ADC Telecommunications DVICS1900-1 Digivance 1900 MHz Indoor Coverage Solution User Manual
ADC Telecommunications Inc Digivance 1900 MHz Indoor Coverage Solution
Contents
- 1. user manual
- 2. usermanual
- 3. dru installation manual
user manual
FCC ID: F8I-DVICS1900-1 ADCP-75-110 Issue 2B July 2001 Digivance™ 800/1900 MHz Indoor Coverage Solution Installation and Operation Manual DRAFT 1175170 Rev A ADCP-75-110 • Issue 2B • July 2001 COPYRIGHT 2001, ADC Telecommunications, Inc. All Rights Reserved Printed in the U.S.A. REVISION HISTORY ISSUE DATE REASON FOR CHANGE Issue 1 04/2001 Original Issue 2 06/2001 Changes in LED operation, new power cable maximum length recommendations, and update to specifications table Issue 2B 07/2001 Updated to cover 1900 MHz version of product TRADEMARK INFORMATION ADC and FiberGuide are registered trademarks of ADC Telecommunications, Inc. Digivance is a trademark of ADC Telecommunications, Inc. LC is a trademark of Lucent Technologies Inc. TORX is a registered trademark of Textron, Inc. DISCLAIMER OF LIABILITY Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period. This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3475 (outside U.S.A. and Canada), or by e-mail to bcg_tac@adc.com. ADC Telecommunications, Inc. P.O. Box 1101, Minneapolis, Minnesota 55440-1101 In U.S.A. and Canada: 1-800-366-3891 Outside U.S.A. and Canada: (952) 938-8080 Fax: (952) 946-3292 Page ii ADCP-75-110 • Issue 2B • July 2001 TABLE OF CONTENTS Content Page SYSTEM FUNCTIONAL OVERVIEW AND UNIT DESCRIPTIONS ........................................ 1 1.1 System Functional Overview ....................................................... 1 1.2 Digital Host Unit Description ....................................................... 3 1.3 Digital Remote Unit Description ..................................................... 7 1.4 Digital Expansion Unit Description ................................................... 9 1.5 Terms and Definitions............................................................12 1.6 Specifications .................................................................13 INSTALLATION PLANNING AND SYSTEM DESIGN ................................................16 2.1 Base Station Interface Requirements..................................................16 2.2 Locating and Mounting Requirements .................................................18 2.3 Powering Requirements ..........................................................19 2.4 Optical Options and Requirements ...................................................20 2.5 Coaxial Cable Requirements .......................................................20 2.6 System Expansion Planning ........................................................20 2.7 DRU Antenna Options ............................................................21 2.8 External Alarm System Reporting Requirements ..........................................23 2.9 Frequency Band Selection Requirements (1900 Mhz) ......................................23 2.10 Maintenance Requirements ........................................................24 2.11 System Design Recommendations ...................................................24 DIGITAL HOST UNIT INSTALLATION PROCEDURE................................................27 3.1 System Plan Review and Pre-Installation Cable Routing .....................................27 3.2 Tools and Materials .............................................................27 3.3 Unpacking and Inspection .........................................................28 3.4 Frequency Band Selection Procedure (1900 Mhz DHU Only) 3.5 Mounting Procecure ............................................................29 3.6 Chassis Ground Procedure.........................................................32 3.7 Coaxial Cable Connections ........................................................33 3.8 Ports 1–6 Optical Connections ......................................................34 3.9 DC Power Connections ...........................................................35 .................................28 3.10 Exterma; Alarm System Connections ..................................................37 3.11 AC Power Connections ...........................................................38 3.12 Create As-Built Drawing ..........................................................39 SYSTEM OPERATION ..................................................................40 4.1 Tools and Materials .............................................................40 4.2 Turn-Up System and Verify Operation .................................................40 4.3 Correct Installation Problems .......................................................43 4.4 Test System Performance .........................................................45 SYSTEM MAINTENANCE PROCEDURES ......................................................46 5.1 Tools and Materials .............................................................46 5.2 Fault Detection and Alarm Reporting ..................................................46 (continued) Page iii 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 TABLE OF CONTENTS Content Page 5.3 Fault Isolation and Troubleshooting .................................................. 47 5.4 Test Procedures ............................................................... 50 5.5 DHU or DEU Fan Replacement...................................................... 54 GENERAL INFORMATION ............................................................... 57 6.1 Warranty/Software ............................................................. 57 6.2 Software Service Agreement ....................................................... 57 6.3 Repair/Exchange Policy .......................................................... 57 6.4 Repair Charges................................................................ 57 6.5 Replacement/Spare Products ...................................................... 58 6.6 Returned Material .............................................................. 58 6.7 Customer Information and Assistance................................................. 58 Page iv 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 ABOUT THIS GUIDE This installation and operation manual provides the following information: • An overview of the Digivance Indoor Coverage Solution (ICS) and a description of the basic system components including the Digital Host Unit (DHU), Digital Expansion Unit (DEU), and the Digital Remote Unit (DRU). • System requirements for planning the Digivance ICS installation. • Procedures for installing the DHU. • Procedures for operating and maintaining the Digivance ICS. • Product warranty, repair, return, and replacement information The procedures for installing the DEU and DRU are provided in other publications which are referenced in the Related Publications section and at appropriate points within this manual. RELATED PUBLICATIONS Listed below are related manuals and their publication numbers. Copies of these publications can be ordered by contacting the ADC Technical Assistance Center at 1-800-366-3891 (in U.S.A. or Canada) or 952-946-3000, extension 63475 (outside U.S.A. and Canada). Title/Description ADCP Number Digivance ICS Digital Expansion Unit Installation Instructions Provides a description of the DEU and procedures for installing the DEU. 75-111 Digivance ICS Digital Remote Unit Installation Instructions Provides a description of the DRU and procedures for installing the DRU. 75-112 Digivance ICS Local Interface Unit User Manual Provides a description of the LIU and procedures for installing the LIU. 75-113 Digivance ICS Remote Interface Unit User Manual Provides a description of the RIU and procedures for installing the RIU. 75-114 Page v 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 ADMONISHMENTS Important safety admonishments are used throughout this manual to warn of possible hazards to persons or equipment. An admonishment identifies a possible hazard and then explains what may happen if the hazard is not avoided. The admonishments — in the form of Dangers, Warnings, and Cautions — must be followed at all times. These warnings are flagged by use of the triangular alert icon (seen below), and are listed in descending order of severity of injury or damage and likelihood of occurrence. Danger: Danger is used to indicate the presence of a hazard that will cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Warning: Warning is used to indicate the presence of a hazard that can cause severe personal injury, death, or substantial property damage if the hazard is not avoided. Caution: Caution is used to indicate the presence of a hazard that will or can cause minor personal injury or property damage if the hazard is not avoided. GENERAL SAFETY PRECAUTIONS The following general admonishments apply throughout the procedures in this manual. Warning: Wet conditions increase the potential for receiving an electrical shock when installing or using electrically-powered equipment. To prevent electrical shock, never install or use electrical equipment in a wet location or during a lightning storm. Warning: The DRU is powered by 48 VDC power which is supplied over customer-provided wiring. To prevent electrical shock when installing or modifying the DRU power wiring, disconnect the wiring at the power source before working with uninsulated wires or terminals. Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical adapters of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating adapter or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the adapter or connector Danger: Do not look into the ends of any optical fiber. Exposure to laser radiation may result. Do not assume laser power is turned-off or the fiber is disconnected at the other end. Danger: Always allow sufficient fiber length to permit routing without severe bends. Fibers may be permanently damaged if bent/curved to a radius of less than 2 inches (50 mm). Page vi 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 STANDARDS CERTIFICATION FCC: This equipment complies with the applicable sections of Title 47 CFR Parts 15, 22, 24, and 90. UL/CUL: This equipment complies with UL and CUL 1950 Standard for Safety for Information Technology Equipment, Including Electrical Business Equipment. FDA/CDRH: This equipment uses a Class 1 LASER according to FDA/CDRH Rules. This product conforms to all applicable standards of 21 CFR Part 1040. LIST OF ACRONYMS AND ABBREVIATIONS The acronyms and abbreviations used in this manual are detailed in the following list: AC AGC AMPS CDMA CDRH CUL DAS DC DEU DHU DRU EIA ERP ESD FCC FDA ICS LIU NOC PWR RIU RF RSSI RX TDMA TX UL UPS VAC VDC WECO Amperes Alternating Current Automatic Gain Control Advanced Mobile Phone Service Code Division Multiple Access Center for Devices and Radiological Health Canadian Underwriters Laboratories Distributed Antenna System Direct Current Digital Expansion Unit Digital Host Unit Digital Remote Unit Electronic Industries Association Effective Radiated Power Electrostatic Discharge Federal Communications Commission Food and Drug Administration Indoor Coverage Solution Local Interface Unit Network Operations Center Power Remote Interface Unit Radio Frequency Received Signal Strength Indication Receive or Receiver Time Division Multiple Access Transmit or Transmitter Underwriters Laboratories Uninterruptible Power Supply Volts Volts Alternating Current Volts Direct Current Western Electric Company Page vii 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 SYSTEM FUNCTIONAL OVERVIEW AND UNIT DESCRIPTION This section provides an overview of the Digivance Indoor Coverage Solution (ICS), a description of the functions and features provided by the units that comprise the system, a listing of terms used and their definition, and a table of specifications. 1.1 System Functional Overview The Digivance ICS is a digitally distributed antenna system that provides in-building coverage for analog (AMPS) or digital (TDMA or CDMA) cellular phone systems operating within the 800 and 1900 MHz frequency bands. Large buildings typically interfere with the transmission or reception of cellular phone system signals by imposing high attenuation losses on RF signals. The Digivance ICS is designed to overcome the attenuation losses that make cellular communications within buildings or structures difficult or impossible. With the Digivance ICS, cellular phone RF signals can be distributed to the interior areas of any building or structure to eliminate dead spots and improve reception. 1.1.1 Basic System Components The basic components of the Digivance ICS and their functions are shown in Figure 1. The basic system consists of the Digital Host Unit (DHU), Digital Remote Unit (DRU), and when additional capacity or longer fiber runs are required, the Digital Expansion Unit (DEU). In addition, two accessory items, the Local Interface Unit (LIU) and the Remote Interface Unit (RIU) may be used as needed to interface the DHU with the cellular system Base Transceiver Station (BTS). 1.1.2 Interface With BTS The DHU interfaces, either locally or remotely, with the BTS. As referenced in this publication, the BTS could be either a microcell or a cell site base station. When the BTS (microcell) is co-located with the DHU, a local interface over coaxial cable is possible. An interface device, such as the LIU, may be required to provide the proper input and output RF signal levels between the BTS and the DHU. When the BTS (cell site base station) is not colocated with the DHU, a remote interface using a donor antenna is required. An interface device such as the RIU is required to provide the proper input and output RF signal levels between the donor antenna and the DHU. The DHU interfaces, as described in the preceding paragraph, with the BTS. In the forward path, the DHU receives RF signals from the BTS. The DHU digitizes the RF signals and then converts them to digital optical signals for transport to the DEUs and DRUs. In the reverse path, the DHU receives digital optical signals from the DRUs and DEUs. The DHU converts the optical signals back to the original RF signal format for transmission to the BTS. Page 1 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 DRU DRU REMOTE BTS DRU DRU RIU DHU RF DRU LIU DRU DEU DRU RF LOCAL BTS DRU DEU DRU DRU DRU 16417-A Figure 1. System Overview Functional Block Diagram 1.1.3 Interface With Cellular Phones The DRUs interface with the cellular phones. In the reverse path, the DRU receives RF signals from each cellular phone. The DRU digitizes the RF signals and then converts them to digital optical signals for transport to the DHU. In the forward path, the DRU receives digital optical signals from the DHU. The DRU converts the optical signals back to the original RF signal format for transmission to the cellular phones. A small antenna is connected to the DRU to transmit and receive RF signals from the cellular phones. Page 2 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 1.1.4 Digital Fiber Optic Transport The DHU is connected to each DRU unit over a pair of multi-mode fiber optic links. One link is used to transport the forward path optical signal. The other link is used to transport the reverse path optical signal. Because the optical signal is digital, no adjustments to the optical signal level are required at the DRU or the DHU regardless of the length of the optical link. Either 50 or 62.5 micron core multi-mode fiber optic cable may be used for the optical link. If 50 micron cable is used, the optical link may be up to 750 meters in length. If 62.5 micron core cable is used, the optical link may be up to 500 meters in length. The fiber optic links are terminated with LC connectors. 1.1.5 Capacity for Expansion and Extended Runs The DEU enables 6-way expansion of any optical port. This makes it possible to add more DRUs without having to install additional DHUs. Each DHU is equipped with six optical ports. If more than six DRUs are required by the application, a DEU may be connected to one of the optical ports at the DHU which expands that port to six ports. If still more optical ports are required, then a second DEU may be connected to the DHU or a second DEU may be connected to the first DEU. The ability to cascade DEU’s in parallel or in series provides unlimited flexibility. It is physically possible to connect an unlimited number DRUs to the DHU through the installation of DEUs. The maximum number of DRUs that can connected to the DHU is limited only by the cumulative noise effect caused by antenna combining. 1.1.6 Power Requirements The DHU, DEU, LIU, and RIU are each powered by 120–240 Vac (50–60 Hz) power which is supplied through a standard three-conductor AC power cord. The DRU is powered by 34–48 Vdc which is supplied by either the DHU, DEU, or an ac/dc wall-mount style converter. When the DRU is powered by the DHU or DEU, the power is fed through a category 3 or 5 cable terminated with male RJ-45 connectors. 1.1.7 Fault Detection and Alarm Reporting LED indicators are provided on the front panel of the various units to indicate if the system is normal or if a fault is detected. In addition, normally open and normally closed alarm contacts (for both major and minor alarms) are provided at the DHU for connection to a customer provided external alarm system. This could be a local system or automatic call-out system. 1.2 Digital Host Unit Description The DHU, shown in Figure 2, serves as the BTS servicing unit for the Digivance ICS. The DHU provides the following basic functions: • RF inputs and outputs • Optical interface to the DRUs or DEUs • Digitizing of the cellular forward path RF signal Page 3 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 • Distribution of the digitized forward path RF signals into six digitized optical signals • Conversion of up to six reverse path digitized optical signals to six digitized RF signals • Combining of the six digitized RF signals into a single composite digitized RF signal • Conversion of the combined digitized RF signal to a composite RF signal • DC power for powering the DRUs • Relay contact closures to provide alarm information to an external alarm system 17.2 INCHES (437 mm) FRONT PANEL MOUNTING BRACKET (BOTH SIDES) 3.5 INCHES (89 mm) 11.4 INCHES (290 mm) 15.3 INCHES (389 mm) CABLE MANAGEMENT TRAY 16418-A Figure 2. Digital Host Unit 1.2.1 Primary Components The DHU consists of two electronic circuit board assemblies, a power supply assembly, and a fan assembly that are mounted within a powder-coated sheet metal enclosure. The metal enclosure provides a mounting point for the electronic assemblies, serves as a heat sink, and controls RF emissions. Except for the fan units, the electronic circuit board assemblies are not user replaceable. The DHU is designed for use within a non-condensing indoor environment such as inside a wiring closet or cabinet. All controls, connectors, and indicators are mounted on the DHU front panel for convenient access. Cable management functions for the power and fiber optic cables are provided by a cable management tray that extends outward from the DHU front panel. 1.2.2 Mounting The DHU may be used in both rack-mount and wall-mount applications. For rack mount applications, a pair of reversible mounting brackets is provided that allow the DHU to be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel of the DHU is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm) beyond the front panel. For wall-mount applications, a pair of holes is provided in the cable management tray which allow the DHU to be mounted on any flat vertical surface. The DHU should be oriented with the front panel facing upward when wall-mounted. Fasteners are provided for rack-mount applications. Page 4 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 1.2.3 Fault Detection and Alarm Reporting The DHU is designed to detect internal circuitry faults and optical port faults. Various front panel Light Emitting Diode (LED) indicators turn from green to red or yellow if a fault is detected or an optical input is lost. A set of alarm contacts (normally open and normally closed) are also provided for reporting an alarm to an external alarm system when a fault is detected. Both major alarm (all fault conditions except high temperature) and minor alarm (high temperature fault condition) contacts are provided. 1.2.4 RF Signal Connections The RF signal connections between the DHU and the BTS are supported through two type N female connectors. One connector is used for coaxial cable connection of the forward path RF signal. The other connector is used for coaxial cable connection of the reverse path RF signal. In most installations, the DHU will not connect directly to the BTS but will be connected to an interface device such as the RIU or the LIU. Additional information concerning the DHU to BTS interface is provided in the Digivance ICS Remote Interface Unit User Manual (ADCP-75-113) and in the Digivance ICS Local Interface Unit User Manual (ADCP-75-114). The DHU requires a composite forward path RF signal level of –20 dBm or lower. An overdrive limiter protects the system against excessive inputs but does not function during normal operation. The DHU does not have Automatic Gain Control (AGC). 1.2.5 Optical and Electrical Interface Connections Operation of the DRUs and DEUs is supported by six optical and six electrical ports. Each optical and electrical interface connection includes a status LED, a small form factor LC type optical transceiver, an RJ-45 DC power jack, and a port enable/disable switch. An optical port may be connected to a DRU, a DEU, or not used. An electrical port may be connected to a DRU or not used. Unused ports require no connections at all and are disabled via the corresponding port enable/disable switch. When disabled, the port LED is off, the alarm reporting function is disabled, the laser is off, and the DC power is off. Enabling the enable/disable switch activates all functions. 1.2.6 Powering The DHU is powered by 120–240 Vac (50–60 Hz) power which is supplied through a standard three-conductor AC power cord. The power cord is provided with the DHU and is 98 inches (2.5 meters ) long. A resetable circuit breaker/On-Off switch is provided at the unit front panel. The switch applies power to the DHU internal power supply. 1.2.7 Cooling Continuous air flow for cooling is provided by dual fans mounted on the right side of the housing. A minimum of 3 inches (76 mm) of clearance space must be provided on both the left and right sides of the DHU for air intake and exhaust. An alarm is provided that indicates if a high temperature condition (>50º C/122º F) occurs. The fans may be field-replaced if either fan fails. 1.2.8 User Interface The DHU user interface consists of the various connectors, switches, terminals, and LEDs that are provided on the DHU front panel. The DHU user interface points are indicated in Figure 3 and described in Table 1. Page 5 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 (3) OPTICAL PORT LED INDICATOR (6 PLACES) (4) OPT/ELEC PORT ENABLE/DISABLE SWITCH (6 PLACES) (5) ELECTRICAL PORT DC POWER JACK (6 PLACES) (6) OPTICAL PORT OPTICAL ADAPTERS TX-LEFT - RX-RIGHT (6 PLACES) (2) AC POWER ON/OFF SWITCH (1) AC POWER CORD CONNECTOR NOTE: SHOWN WITHOUT CABLE MANAGEMENT TRAY (7) UNIT LED INDICATOR (10) RF INPUT CONNECTOR (9) ALARM (8) OVERDRIVE (11) RF OUTPUT TERMINAL LED CONNECTOR STRIP INDICATOR 16419-A Figure 3. Digital Host Unit User Interface Table 1. Digital Host Unit User Interface REF No. USER INTERFACE DESIGNATION DEVICE FUNCTIONAL DESCRIPTION POWER 3-wire AC power cord connector Used for connecting the AC power cord. I/O I/O rocker switch/ circuit breaker Provides AC power On/Off control and AC power over current protection. OK/NOK (Ports 1–6) Multi-colored LED (Red/Green/Yellow) Indicates if the DRU or remote DEU connected to the optical port is normal or faulty or if the reverse path optical input from the DRU or remote DEU is normal or lost. (see Note) ON/OFF (Ports 1–6) I/O rocker switch Enables or disables corresponding electrical and optical ports. DC PWR (Ports 1–6) RJ-45 jack (female) Used for connecting a DRU cat 3 or 5 power cable to the designated DC power jack. FIBER (Ports 1–6) Small form factor LC-type optical transceiver Used for connecting each DEU or DRU forward path and reverse path optical link to the designated optical port. UNIT Multi-colored LED (Red/Green/Yellow) Indicates if the DHU is normal or faulty. (see Note) OVERDRIVE Multi-colored LED (Red/Green/Yellow) Indicates when the forward path RF input power is overdriving the DHU digitizing circuitry. (see Note) MAJOR Screw-type terminal connector (14–26 AWG) Used for connecting an external alarm system to the DHU. Includes normally open (NO), normally closed (NC), and common (COM) wiring connections. 10 RF IN N-type female RF coaxial connector Used for connecting the forward path RF coaxial cable to the DHU. 11 RF OUT N-type female RF coaxial connector Used for connecting the reverse path RF coaxial cable to the DHU. MINOR Note: A detailed description of LED operation is provided in Section 4. Page 6 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 1.3 Digital Remote Unit Description The DRU, shown in Figure 4, serves as the cellular user servicing unit for the Digivance ICS. The DRU provides the following basic functions: • RF interface to the cellular users via an external antenna • Optical interface to the DHU or DEU • Conversion of the forward path digitized optical signal to a digitized RF signal • Conversion of the digitized forward path RF signal to the original cellular RF signal • Digitizing of the cellular reverse path RF signal • Conversion of the digitized reverse path RF signal to a digital optical signal output • Transports alarm status via optical link FRONT PANEL 2.1 INCHES (53 mm) MOUNTING FOOT (EACH CORNER) 7.3 INCHES (185 mm) 7.0 INCHES (178 mm) 16420-A Figure 4. Digital Remote Unit 1.3.1 Primary components The DRU consists of an electronic circuit board assembly that is mounted within a powdercoated sheet metal enclosure. The metal enclosure provides a mounting point for the electronic assembly, serves as a heat sink, and controls RF emissions. The electronic circuit board assembly is not user replaceable. The DRU is designed for use within a non-condensing indoor environment such as inside a building. All controls, connectors, and indicators (except the SMA antenna connector) are mounted on the DRU front panel for convenient access. 1.3.2 Mounting The DRU is equipped with four integral mounting feet that allow it to be mounted on any flat horizontal or vertical surface. A typical location for mounting the DRU would be above ceiling tiles where the optical fiber and power cables can be concealed or on a wall. Slots are provided in the mounting feet for securing the DRU to the mounting surface. Page 7 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 1.3.3 Fault Detection The DRU is designed to detect internal circuitry faults or loss of system inputs. A front panel LED indicator turns from green to red when a fault condition is detected or when the optical input is lost. The DRU sends the fault information to the DHU or DEU over the fiber optic link. A corresponding port LED at the DHU or DEU turns from green to red when the DRU reports a fault. 1.3.4 RF Signal Interface The RF signal interface between the DRU and the cellular users is provided through an external antenna connected to a female SMA connector. The antenna must be ordered separately. Several types of antennas with various RF propagations are available. Non-ADC antennas may also be used with the DRU to meet various application requirements. 1.3.5 Optical Port The DRU is equipped with a small form factor LC type optical transceiver that provides a point for connecting the optical link cables. Depending on the application requirements, the optical port may be connected to either a DHU or a DEU. 1.3.6 Powering The DRU is equipped with a female RJ-45 jack that provides a point for connecting a DC power cable. The DRU is powered by 34–48 Vdc power which is supplied through the RJ-45 connector. Power to the DRU may be supplied by the DHU, DEU, or by a 120 Vac to 48 Vdc power converter (available separately as an accessory item) plugged into a properly grounded 120 Vac outlet. The ac/dc converter is a UL Listed stand alone Limited Power Supply (LPS) unit with a rated output of 48 Vdc at 1.2 Amps. When powered by the DHU or DEU, a category 3 or 5 twisted-pair cable terminated with RJ-45 connectors is required. 1.3.7 Cooling The DRU is cooled by natural convection air flow. The DRU mounting feet are designed to provide clearance under the unit so that air can enter the DRU enclosure from the bottom and exit through the top. A minimum clearance of 3 inches (76 mm) must be provided on all sides of the DRU (except the bottom) to ensure there is adequate air circulation for cooling. In addition, at least one surface of the DRU installation area must be open to the interior of the building. 1.3.8 User Interface The DRU user interface consists of the connectors and the LED that are provided on the DRU front and rear panels. The DRU user interface points are indicated in Figure 5 and described in Table 2. Page 8 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 (3) FIBER LINK (2) 48 VDC POWER OPTICAL ADAPTERS CONNECTOR TX-LEFT - RX-RIGHT FRONT VIEW REAR VIEW 16421-A (1) STATUS LED (4) ANTENNA CONNECTOR Figure 5. Digital Remote Unit User Interface Table 2. Digital Remote Unit User Interface REF No. USER INTERFACE DESIGNATION DEVICE FUNCTIONAL DESCRIPTION STATUS Multi-colored LED (Red/Green/Yellow) Indicates if the status of the DRU is normal or faulty or if the forward path optical input is normal or lost. (see Note) 48 VDC RJ-45 jack (female) Used for connecting a DC power cable. FIBER TX RX Small form factor LC-type optical transceiver Used for connecting the forward path and reverse path optical links. SMA-type coaxial connector (female) Used for connecting the antenna coaxial cable lead. – Note: A detailed description of LED operation is provided in Section 4. 1.4 Digital Expansion Unit Description The DEU, shown in Figure 6, serves as a service expansion unit and line extender for the Digivance ICS. The DEU provides the following basic functions: • Optical interface to the DHU and up to six DRUs or DEUs • Conversion of the forward path digitized optical signal to an electrical bit stream • Splitting of the electrical bit stream into six separate bit streams • Conversion of the six forward path electrical bit streams into six digital optical signals • Conversion of up to six reverse path digital optical signals into six serial bit streams • Combining of the six reverse path serial bit streams into a single digital composite signal • Conversion of the single digital composite signal to a digital optical signal • DC power for powering the DRUs • Alarm transport via the optical links Page 9 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 17.2 INCHES (437 mm) FRONT PANEL MOUNTING BRACKET (BOTH SIDES) 3.5 INCHES (89 mm) 11.4 INCHES (290 mm) 16422-A 15.3 INCHES (389 mm) CABLE MANAGEMENT TRAY Figure 6. Digital Expansion Unit 1.4.1 Primary Components The DEU consists of two electronic circuit board assemblies and a power supply that are mounted within a powder-coated sheet metal enclosure. The metal enclosure provides a mounting point for the electronic assemblies and serves as a heat sink. Except for the fan units, the electronic circuit board assemblies are not user replaceable. The DEU is designed for use within a non-condensing indoor environment such as inside a wiring closet or cabinet. All controls, connectors, and indicators are mounted on the DEU front panel for convenient access. Cable management functions for the power and fiber optic cables are provided by a cable management tray that extends outward from the DEU front panel. 1.4.2 Mounting The DEU may be used in both rack-mount and wall-mount applications. For rack mount applications, a pair of reversible mounting brackets is provided that allow the DEU to be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel of the DEU is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm) beyond the front panel. For wall-mount applications, a pair of holes is provided in the cable management tray which allow the DEU to be mounted on any flat vertical surface. The DEU should be oriented with the front panel facing upward when wall-mounted. Fasteners are provided for rack-mount applications. 1.4.3 Fault Detection The DEU is designed to detect internal circuitry faults or loss of system inputs. Various front panel Light Emitting Diode (LED) indicators turn from green to red or yellow when a fault is detected or when an optical input is lost. The DEU transports the fault information to the DHU or supporting DEU over the fiber optic link. A corresponding port LED at the DHU or DEU turns from green to red when the DEU reports a fault. Page 10 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 1.4.4 Optical and Electrical Interface Connections Operation of the DRUs and DEUs is supported by six optical and six electrical ports. Each optical and electrical interface connection includes a status LED, a small form factor LC type optical transceiver, an RJ-45 DC power jack, and a port enable/disable switch. An optical port may be connected to a DRU, a DEU, or not used. An electrical port may be connected to a DRU or not used. Unused ports require no connections at all and are disabled via the corresponding port enable/disable switch. When disabled, the port LED is off, the alarm reporting function is disabled, the laser is off, and the DC power is off. Enabling the enable/disable switch activates all functions. The DEU also provides one optical port designated the host port for the optical interface with the DHU or a supporting DEU. 1.4.5 Powering The DEU is powered by 120–240 Vac (50–60 Hz) power which is supplied though a standard three-conductor AC power cord. The power cord is provided with the DEU and is 98 inches (2.5 meters) long. A reset able circuit breaker/On-Off switch is provided at the unit front panel. The switch applies power to the DEU internal power supply. 1.4.6 Cooling Continuous air flow for cooling is provided by dual fans mounted on the right side of the sheet metal housing. A minimum of 3 inches (76 mm) of clearance space must be provided on both the left and right sides of the DEU for air intake and exhaust. An alarm is provided that indicates if a high temperature condition (>50º C/122º F) occurs. The fans may be fieldreplaced if either unit fails. 1.4.7 User Interface The DEU user interface consists of the various connectors, switches, and LEDs that are provided on the DEU front panel. The DEU user interface points are indicated in Figure 7 and described in Table 3. (2) AC POWER ON/OFF SWITCH (1) AC POWER CORD CONNECTOR NOTE: SHOWN WITHOUT CABLE MANAGEMENT TRAY (3) OPTICAL PORT LED INDICATOR (6 PLACES) (5) ELECTRICAL PORT DC POWER JACK (6 PLACES) (4) OPT/ELEC PORT ENABLE/DISABLE SWITCH (6 PLACES) (6) OPTICAL PORT OPTICAL ADAPTERS TX-LEFT - RX-RIGHT (6 PLACES) (8) UNIT LED INDICATOR (7) HOST PORT OPTICAL ADAPTERS TX-LEFT - RX-RIGHT (9) HOST PORT LED INDICATOR 16423-A Figure 7. Digital Expansion Unit User Interface Page 11 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 3. Digital Expansion Unit User Interface REF No. USER INTERFACE DESIGNATION FUNCTIONAL DESCRIPTION DEVICE POWER 3-wire AC power cord connector Used for connecting the AC power cord. I/O I/O rocker switch/ circuit breaker Provides AC power On/Off control and AC power over current protection. OK/NOK (Ports 1–6) Multi-colored LED (Red/Green/Yellow) Indicates if the DRU or remote DEU connected to the optical port is normal or faulty or if the reverse path optical input from the DRU or remote DEU is normal or lost. (see Note) ON/OFF (Ports 1–6) I/O rocker switch Enables or disables corresponding electrical and optical ports. DC PWR (Ports 1–6) RJ-45 jack (female) Used for connecting a DRU cat 3 or 5 power cable to the designated DC power jack. FIBER (Ports 1–6) Small form factor LC-type optical transceiver Used for connecting each DRU or remote DEU forward path and reverse path optical link to the designated optical port. HOST PORT Small form factor LC-type optical transceiver Used for connecting the DHU or supporting DEU forward path and reverse path optical link. UNIT Multi-colored LED (Red/Green/Yellow) Indicates if the DEU is normal or faulty. (see Note) HOST PORT Multi-colored LED (Red/Green/Yellow) Indicates if the forward path optical input from the DHU or supporting DEU is normal or lost. (see Note) Note: A detailed description of LED operation is provided in Section 4. 1.5 Terms and Definitions Refer to Table 4 for a listing of the terms used in this manual and their definition. Table 4. Terms and Definitions TERM DEFINITION Alarm Response The response to an alarm input. Base Transceiver Station The radio equipment that transmits and receives the voice and control channels to and from the cellular handsets. Composite Signal The sum of several combined signals. Digital Expansion Unit The unit that extends a single optical interface to multiple optical interfaces or that extends an optical run. Digital Host Unit The unit that converts and provides the digital source signal to all DEUs and DRUs and converts summed inputs from DEUs and DRUs. (continued) Page 12 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 4. Terms and Definitions, continued TERM DEFINITION Digital Remote Unit The unit that interfaces the in-building user to the Digivance optical transport. Digitized RF Signal The RF signal in a digitized form. Forward Path Signal A signal that travels from the base station to the cell phone. Major Alarm An alarm condition that applies when any fault (except high temperature) occurs. Minor Alarm The alarm condition that applies when a high temperature condition occurs. (> 50º C/122º F) Mute To force a forward path RF signal to a “no signal” state. Normal State The operating state after power-up is completed and no faults are detected. Port An RF, optical, or electrical interface point. Port Alarm A fault that affects only the unit or units connected to that port. Indicates no optical input to port. Power-Up State The period between the application of power to a unit and the normal state. This period includes time for circuit stabilization and initialization operations. Reverse Path Signal A signal that travels from one or more cell phones to the base station. Transport Alarm Signal An alarm signal transported over the fiber optic link. Unit Alarm A fault within a unit that usually affects all connected ports. 1.6 Specifications Refer to Table 5 for the Digivance ICS system specifications. All specifications apply after five minute warm-up period. Table 5. System Specifications PARAMETER SPECIFICATION REMARKS Optical – All Units Fiber type Multimode 50 or 62.5 micron core Two fibers per link Maximum Fiber Length 500 m (1,641 ft) 750 m (2461 ft) With 62.5 micron core With 50 micron core Optical Output Power –10 to +4 dBm Optical Wavelength 850 nm Environmental Operating Temperature 0º to 50º C (32º to 122º F) Storage Temperature –30º to +70º C (–22 to 158º F) Humidity No condensation Weather resistance Indoor installation only (continued) Page 13 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 5. System Specifications, continued PARAMETER SPECIFICATION RF Forward Path System Bandwidth 25 MHz REMARKS 800 MHz frequency range (A and B band) US Cellular 869 to 894 MHz 1900 MHz freq. ranges AD band DBE band BEF band EFC band US PCS 1925 to 1950 MHz 1945 to 1970 MHz 1950 to 1975 MHz 1965 to 1990 MHz Output power +13 dBm ± 1 dB at midpoint of passband Maximum composite power Gain +33 ± 1.5 dB at band center At room temperature Gain variation < 6 dB < 1.5 dB variation Over frequency, temperature, and unit to unit. Per 1.25 MHz CDMA channel OIP3 > +35 dBm At +13 dBm composite output CDMA ACPR1 < –45 dBc Spurious Output < –35 dBm DHU RF input signal level –20 dBm maximum composite RF Reverse Path System bandwidth Provides a nominal +13 dBm RF output signal at the DRU 25 MHz 800 MHz frequency range (A and B band) US Cellular 824 to 849 MHz 1900 MHz freq. ranges AD band DBE band BEF band EFC band US PCS 1845 to 1870 MHz 1865 to 1890 MHz 1870 to 1895 MHz 1885 to 1910 MHz Gain +10 dB ± 1 dB at midpoint of passband Gain Variation < 6 dB < 1.5 dB variation Over frequency, temperature, and unit to unit. Per 1.25 MHz CDMA channel Automatic Gain Limiting Prevents A/D saturation with large inputs. Disabled for composite RF input < –40 dBm Noise Figure < 8 dB typical midband 8 + 10 log N (N = # of remotes) See Note at end of table DHU RF output signal level –30 dBm typical With a –40 dBm composite maximum input signal at the DRU (continued) Page 14 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 5. System Specifications, continued PARAMETER SPECIFICATION REMARKS Physical/Electrical – DHU Weight 18.5 lbs (8.4 kg) RF connection Type N Female Alarm connection Screw terminals (14–26 AWG) NO, NC, and COM Optical connection Duplex LC transceiver DC pwr output connection RJ-45 Female Power input 120/240 Vac, 50–60 Hz AC power connection IEC 320 Male Power consumption 250 W Maximum Current rating 85–250 Vac, 2 Amp input Physical/Electrical – DEU Weight 18.5 lbs (8.4 kg) Optical connection Duplex LC transceiver DC pwr output connection RJ-45 Power input 120/240 Vac, 50–60 Hz AC power connection IEC 320 Male Power consumption 250 W Maximum Current rating 85–250 Vac, 2 Amp input Physical/Electrical – DRU Weight 1.5 lbs (708 g) RF connection SMA Female 800 MHz antenna types Ceiling mount omni directional 70º directional panel 90º directional panel Ceiling mount hallway 2.5 dBi gain 8 dBi gain 7.5 dBi gain 4 dBi gain 1900 MHz antenna types Ceiling mount omni directional 90º directional panel Ceiling mount hallway 2.5 dBi gain 7.5 dBi gain 4 dBi gain Optical connection Duplex LC transceiver DC pwr input connection RJ-45 Power input 34 to 48 Vdc DC power cable maximum length (Cat-3 or -5 cable) 500 meters (1,641 ft) Any distance beyond 500 meters requires alternate power sourcing Power consumption 17 W Typical Current rating 48 Vdc, 350 mA input Female Female Note: The noise from all remotes is added at the host. Given N units with identical gain and noise, the formula applies exactly. Slight unit to unit noise figure and gain variations make this a very useful approximation. Page 15 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 INSTALLATION PLANNING AND SYSTEM DESIGN This section provides installation planning information and basic system design recommendations for RF engineers that will be designing and installing an in-building coverage solution using the Digivance ICS. System design and planning services are available from ADC if required. Refer to Section 6 of this manual for additional information. 2.1 Base Station Interface Requirements The DHU may be interfaced either locally or remotely with the BTS. As referenced in this publication, the BTS could be either a microcell or a cell site base station. With a local interface, a hard-wire connection is provided between the DHU and the BTS (microcell) using coaxial cables. With a remote interface, an over-the-air connection is provided between the DHU and the BTS (cell site base station) using a donor antenna. 2.1.1 Local BTS (Microcell) Interface A local interface between the DHU and the BTS (microcell) over coax requires specific RF input and output signal levels at the DHU and BTS. The correct levels can be provided at the BTS and DHU using the Local Interface Unit (LIU). The LIU is an accessory item that provides adjustable gain or attenuation in both the RF forward and reverse path. The level of the RF output signal from the BTS will vary depending on the type of BTS. Therefore, it will generally be necessary to add some gain or some attenuation to the forward path (downlink) signal to provide the recommended composite maximum RF input signal level at the DHU which is–20 dBm. When the level of the RF input signal at the DHU is –20 dBm, the level of the RF output signal at the DRU will be +13 dBm which is the maximum allowed. In the reverse path, the input signal level required at the BTS will also vary depending on the type of BTS. When the level of the reverse path (uplink) signal at the DRU is at the recommended composite maximum of –40 dBm, the level of the RF output signal from the DHU is –30 dBm. Therefore, it may be necessary to add some gain or attenuation to the reverse path signal in order to achieve the required RF input signal level at the BTS. A block diagram showing a typical local DHU to BTS interface is provided in Figure 8. DIRECTIONAL ANTENNA TO/FROM HANDSETS -20 dBm (COMPOSITE MAX) FORWARD (DOWNLINK) T1 LINK TO SWITCH LOCAL BASE TRANSCEIVER STATION (MICRO CELL) LOCAL INTERFACE UNIT REVERSE (UPLINK) +13 dBm (COMPOSITE MAX) OPTICAL LINK DIGITAL HOST UNIT -30 dBm (COMPOSITE MAX) DIGITAL REMOTE UNIT OPTICAL LINK Figure 8. Local BTS Interface Block Diagram Page 16 © 2001, ADC Telecommunications, Inc. -40 dBm (COMPOSITE MAX) 16424-A ADCP-75-110 • Issue 2B • July 2001 The LIU is rack or wall mountable and is powered by 120–240 Vac (50–60 Hz) power. Refer to the Digivance Local Interface Unit User Manual (ADCP-75-113) for a complete description of the LIU. 2.1.2 Remote BTS (Cell Site Base Station) Interface A remote interface between the DHU and the BTS (cell site base station) via a donor antenna requires specific RF input and output signal levels at the DHU and antenna. The correct levels at the DHU and antenna can be provided using the Remote Interface Unit (RIU). The RIU is an accessory item that provides adjustable gain or attenuation in both the RF forward and reverse paths. The RIU connects to a directional antenna through a duplexer which provides separate forward and reverse path connections for the DHU. In the forward path (downlink), the RIU provides the DHU with the recommended composite maximum RF input signal level of –20 dBm. When the level of the RF input signal at the DHU is –20 dBm, the level of the RF output signal at the DRU is +13 dBm which is the maximum allowed. In the reverse path, the required RF output signal level to the donor antenna will vary depending on the distance from the BTS. When the level of the reverse path (uplink) signal at the DRU is at the recommended composite maximum level of –40 dBm, the level of the RF output signal from the DHU is –30 dBm. Therefore, it may be necessary to add gain or attenuation to the reverse path signal in order to achieve the required output signal level at the RIU antenna port. A block diagram showing a typical remote DHU to BTS interface is provided in Figure 9. The RIU is rack or wall mountable and is powered by 120–240 Vac (50–60 Hz) power. Refer to the Digivance Remote Interface Unit User Manual (ADCP-75-114) for a complete description of the RIU. DIRECTIONAL ANTENNA TO/FROM CELL SITE BTS REVERSE (UPLINK) DIRECTIONAL ANTENNA TO/FROM HANDSETS FORWARD (DOWNLINK) +13 dBm (COMPOSITE MAX) -20 dBm (COMPOSITE MAX) OPTICAL LINK DIGITAL HOST UNIT REMOTE INTERFACE UNIT -30 dBm (COMPOSITE MAX) -40 dBm (COMPOSITE MAX) DIGITAL REMOTE UNIT OPTICAL LINK 16425-A Figure 9. Remote BTS Interface Block Diagram Page 17 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 2.2 Location and Mounting Requirements 2.2.1 DHU and DEU Location and Mounting Requirements The DHU and the DEU may be either rack mounted or wall mounted. Fasteners (both metric and US standard) are included with each unit for rack mount applications. A pair of reversible mounting brackets is provided that allows the unit to be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. When rack-mounted, the front panel of the unit is flush with the front of the rack. The cable management tray extends 3.9 inches (99 mm) beyond the front panel. Both the DHU and DEU occupy 3.5 inches (89 mm) of rack space. Make sure the mechanical loading of the rack will be even to avoid a hazardous condition such as a severely unbalanced rack. The rack should safely support the combined weight of all the equipment it holds. For wall-mount applications of the DHU or DEU, a pair of holes is provided in the cable management tray that allows the unit to be mounted on any flat vertical surface. The mounting holes are spaced 11-21/32 inches (296 mm) apart. Orient the DHU/DEU so the front panel faces up when mounted. Appropriate fasteners for wall mounting must be provided by the installer. It is recommended that a backer board such as 3/4-inch plywood be installed over the mounting surface to provide a secure base for attaching the DHU or DEU. Mount the DHU and DEU in a non-condensing indoor environment such as inside a wiring closet or within an environmentally controlled cabinet. All controls, connectors, and indicators are mounted on the front panel. Route all cables to the front panel for connection. Use the cable retainers provided on the cable management tray to secure the fiber optic, DC power, and external alarm system cables. The maximum recommended ambient temperature for the DHU and DEU is 50º C (122º F). Allow sufficient air circulation or space between each unit when installed in a multi-unit rack assembly because the operating ambient temperature of the rack environment might be greater than room ambient. Provide a minimum clearance of 3 inches (76 mm) on both the left and right sides of the unit for air intake and exhaust. Refer to Figure 2 for the DHU dimensions and Figure 6 for the DEU dimensions. 2.2.2 DRU Location and Mounting Requirements The DRU may be wall-mounted or ceiling-mounted. The DRU is equipped with four integral mounting feet that allow it to be fastened to any flat vertical or horizontal surface. Holes are provided in the mounting feet for inserting fasteners. Appropriate fasteners for securing the DRU to the selected mounting surface must be provided by the installer. Mount the DRU in a non-condensing indoor environment. Route the DC power cable and fiber optic links to the DRU front panel for connection. Route the antenna coaxial cable to the DRU rear panel for connection. Provide a minimum of 3 inches (76 mm) of clearance space on all sides of the DRU (except the bottom) to ensure there is adequate air circulation for cooling. In addition, at least one surface of the DRU installation area must be open to the interior of the building. If a portable/flexible antenna will be installed, allow a minimum of 9 inches (229 mm) clearance along the surface with the antenna. Refer to Figure 4 for the DRU dimensions. Page 18 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 2.3 Powering Requirements 2.3.1 DHU and DEU Powering The DHU and DEU are powered by 120–240 Vac (50–60 Hz) which is supplied through a standard three-conductor AC power cord. The 120 Vac power cord is provided with the unit and is 98 inches (2.5 m) long. Both the DHU and the DEU have a current rating of 2.0 Amps at 120 Vac input. Locate each unit so that an AC outlet is within the reach of the power cord. If back-up powering is required, it is recommended that the building Uninterruptible Power Supply (UPS) system be used to provide back-up power to the DHU and DEU in the event of an AC power outage. 2.3.2 DRU Powering The DRU is powered by 48 Vdc power which is supplied to the DRU through the front panel RJ-45 connector. Power to the DRU may be provided by the DHU, DEU, or by a 120 Vac to 48 Vdc power converter (available separately as an accessory item) plugged into a properly grounded 120 Vac outlet. The DRU has a current rating of 350 mA at 48 Vdc input. If the DRU will be powered by the DHU or DEU, the power cable must be fabricated on-site by the installer. Use category 3 or 5 twisted pair cable as the power supply cable when the DRU is powered by the DHU or DEU. The maximum recommended length of the power cable is 500 meters. If the DRU will be located more than 500 meters from the DHU or DRU, the DRU must be locally powered by a 48 Vdc power converter. Route the power cable between the power source and the DRU. Terminate both ends of the power cable with a male RJ-45 connector. The DRU may be powered locally by the ac/dc converter, shown in Figure 10, which is available as an accessory item. The converter is a UL Listed stand alone Limited Power Supply (LPS) unit with a rated output of 48 Vdc at 1.2 Amps. The converter is equipped with a 6-foot (1.8 m) DC power cable which is terminated with an RJ-45 male connector. The converter is powered by 120–240 Vac (50–60 Hz) power which is supplied though a standard three-conductor AC power cord. The 120 Vac power cord is 6 feet (1.8 m) long and is provided with the converter. 15988-A Figure 10. AC/DC Power Converter Page 19 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 2.4 Optical Options and Requirements Each DHU and its associated DEUs and DRUs are connected over a pair of fiber optic links. One link transports the forward path optical signal and the other link transports the reverse path optical signal. Either 50 or 62.5 micron core multi-mode fiber optic cable may be used for the optical link. If 50 micron cable is used, the optical link may be up to 750 meters (2461 ft) in length. If 62.5 micron cable is used, the optical link may be up to 500 meters (1,641 ft) in length. A diagram of the optical connections is shown in Figure 11. BASIC CONFIGURATION WITH DHU AND DRU DIGITAL HOST UNIT DIGITAL REMOTE UNIT PORTS 1-6 TX FIBER PORT TX RX RX REVERSE PATH FORWARD PATH BASIC CONFIGURATION WITH DHU, DEU, AND DRU DIGITAL EXPANSION UNIT DIGITAL HOST UNIT PORTS 1-6 PORTS 1-6 TX RX TX DIGITAL REMOTE UNIT HOST PORT RX TX FIBER PORT RX TX REVERSE PATH REVERSE PATH FORWARD PATH FORWARD PATH END-TO-END OPTICAL CONNECTOR/CABLE ASSEMBLY DIAGRAM Figure 11. Digivance ICS Optical Connections Page 20 © 2001, ADC Telecommunications, Inc. RX ADCP-75-110 • Issue 2B • July 2001 Whenever possible, use conduit or a guideway such as the FiberGuide system to route the optical links between the DHU, the DEUs, and the DRUs. Avoid routing optical fibers through ladder type cable racks or troughs that do not provide sufficient support to limit bending or prevent accidental damage. Tie-wrapping is not recommended as a means of securing fiber optic cables. Provide sufficient slack at each unit for connecting each fiber to the required port. Fibers may be preterminated or terminated on-site using field-installable LC type connectors. 2.5 Coaxial Cable Requirements The DHU interfaces either locally (see Figure 8) or remotely (see Figure 9) with the BTS through coaxial cable connections. In a local interface with the BTS, coaxial cables are required to link the DHU with the LIU and the LIU with the BTS. In a remote interface, coaxial cables are required to link the DHU with the RIU and the RIU with the donor antenna. The DHU, LIU, and RIU are equipped with N-type female connectors for connecting the forward and reverse path coaxial cables. Use high performance, flexible, low loss 50-ohm coaxial communications cable (RG 400 or equivalent) for all coaxial connections. 2.6 System Expansion Planning The DEU enables 6-way expansion of any optical port. This makes it possible to add more DRUs without having to install additional DHUs. Each DHU is equipped with six optical ports. If more than six DRUs are required by the application, a DEU may be connected to one of the optical ports at the DHU which expands that port to six ports. If still more optical ports are required, then a second DEU may be connected to the DHU or a second DEU may be connected to the first DEU. The ability to cascade DEU’s in parallel or in series provides unlimited flexibility. It is physically possible to connect an unlimited number DRUs to the DHU through the installation of DEUs. The total number of DRU’s that can be served is limited by the cumulative noise effect caused by antenna combining. This number cannot be determined until the radius distance of coverage required at the DRU antenna is determined and the path loss attributed to the structure are known. The system design requires that the carrier to noise differential be greater than the customer’s desired signal to noise ratio. If it is likely that the system will be expanded in the future, locate the DHU in such a way that it can either be used as a hub for an expanded system or replaced with a DEU which is then connected to a relocated DHU. It should also be noted that a DEU can be used as an optical regenerator. A DRU may sometimes need to be located at a point that is beyond the 500 or 750 meter limit (depending on fiber type) imposed by the optical link. The solution is to install a DEU at the maximum optical link limit (500 or 750 meters) from the DHU. This provides an additional 500 or 750 meters of optical link beyond the DEU for connecting the DRU. 2.7 DRU Antenna Options Various antennas, shown in Figures 12 and 13, are available from ADC for use with the DRU. All antennas include a 6 foot (1.8 m) long 50-ohm coaxial cable (equipped with SMA male connector) for connection to the DRU. The DRU is equipped with an SMA female connector for connecting the antenna cable. Page 21 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 ALL ANTENNAS ARE EQUIPPED WITH A 72-INCH RG58/U CABLE TERMINATED WITH A MALE SMA CONNECTOR MOUNTING STUD LENGTH - 1.5 INCHES (38 mm) DIAMETER - 0.875 INCHES (22 MM) 2.26 INCHES (57 MM) MOUNTING STUD LENGTH - 1.5 INCHES (38 mm) DIAMETER - 0.875 INCHES (22 MM) 7.26 INCHES (184 MM) DIAMETER - 6.14 INCH (156 MM) DEPTH - 1.05 INCH (27 MM) 3.88 INCHES (99 MM) 2.5 dBi GAIN CEILING-MOUNT OMNIDIRECTIONAL 4 dBi GAIN CEILING-MOUNT HALLWAY 7.90 INCHES (201 MM) 8.65 INCHES (220 MM) 2.38 INCHES (60 MM) 8.65 INCHES (220 MM) 6.55 INCHES (166 MM) 8 dBi GAIN 70 DIRECTIONAL PANEL (WALL-MOUNT) 2.38 INCHES (60 MM) MOUNTING BASE LENGTH - 3.85 INCHES (98 MM) 7.5 dBi GAIN 90 DIRECTIONAL PANEL (CORNER MOUNT) 16237-C Figure 12. 800 MHz DRU Antenna Options The DRU antennas are designed for unobtrusive mounting within an office environment. Each type of antenna provides a specific coverage pattern in order to accommodate the shape of the area where coverage is required. The ceiling-mount omni directional antenna is designed to mount in the center of the coverage area. The directional panel antenna is designed to mount vertically on one side of the coverage area. The panel antenna (800 MHz only) provides is designed to mount vertically in the corner of the coverage area. The ceiling mount hallway antenna is designed to mount in the center of long corridors. Antennas other than those offered by ADC may also be used if required. Note: To comply with Maximum Permissible Exposure (MPE) requirements, antennas must be installed to provide at least 20 centimeters (8 inches) of separation from all persons per FCC 47 CFR part 2.1091. Page 22 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 ALL ANTENNAS ARE EQUIPPED WITH A 72-INCH RG58/U CABLE TERMINATED WITH A MALE SMA CONNECTOR MOUNTING STUD LENGTH - 1.5 INCHES (38 mm) DIAMETER - 0.875 INCHES (22 MM) DIAMETER - 4.25 INCH (105 MM) DEPTH - 0.57 INCH (14 MM) 4 dBi GAIN CEILING-MOUNT HALLWAY 2.5 INCHES (64 MM) 2.5 dBi GAIN CEILING-MOUNT OMNIDIRECTIONAL 3 INCHES (76 MM) 5 INCHES (127 MM) 0.5 INCHES (13 MM) 7.5 dBi GAIN 90 DIRECTIONAL PANEL (COMBINATION WALL AND CORNER MOUNT) 4.6 INCHES (118 MM) MOUNTING BASE LENGTH - 2.5 INCHES (64 MM) 1.4 INCHES 36 MM) Fig 13-A Figure 13. 1900 MHz DRU Antenna Options 2.8 External Alarm System Reporting Requirements The DHU provides normally open (NO) and normally closed (NC) dry alarm contacts for reporting minor and major alarms to an external alarm system. A minor alarm is defined as a high temperature condition. A major alarm is defined as any fault condition except high temperature. Connections to the alarm contacts are provided through a screw-type terminal strip. Use category 3 or 5 cable for the alarm wires. If an external alarm system is not in use, no alarm connections are required. 2.9 Frequency Band Selection Requirements (1900 MHz) The 1900 MHz version of the DHU and DRU must be configured by the installer to operate in the appropriate forward and reverse path frequency band. Four band selections (AD, DBE, BEF, and EFC) are possible. A DIP switch on the underside of each unit is provided for selecting the required frequency band. The band selection must be done prior to installation since the DIP switch is usually not accessible after the unit is mounted. Once the required selection has been made, no further band adjustments are required. Page 23 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 2.10 Maintenance Requirements The Digivance ICS requires no regular maintenance to insure continuous and satisfactory operation. Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and correcting service problems as they occur. Faults and failures arising from within the Digivannce ICS will generate an external alarm response which includes lighting an LED indicator(s) and closing or opening a set of alarm contacts. When an alarm is reported, it will be necessary to isolate the source of the problem by observing the LED indicators on each unit and then performing specified tests to isolate the problem. Once the source of the fault is isolated, the appropriate action can be taken to correct the problem. The only unit components that can be replaced are the cooling fans which mount in the DHU and the DEU. The failure of any other component within a unit will require replacement of the unit. Basic trouble-shooting procedures are provided in Section 5 of this manual. 2.11 System Design Recommendations Follow a systematic process when designing an in-building coverage solution. The following sub sections outline the four phases of the in-building coverage solution design process. System design and planning services are available from ADC if required. Refer to Section 6 of this manual for additional information. 2.11.1 Phase One – Initial Evaluation Qualify the Installation: Confirm that there are no extenuating circumstances that would prevent a successful installation such as: extreme cellular system issues (blocking, severe interference, site problems, etc.), building issues, power issues, or safety issues (site should not present any hazards or conditions that would make operation of the equipment unsafe). Analyze the RF Situation: Determine how the system RF link to the outside world will be provided. Will it be a direct feed from a BTS (microcell) or an over-the-air connection via a donor antenna? If it is a donor antenna, is the customer within the coverage footprint of a serving cell or better? The coverage can be determined during the preliminary walkthrough by checking the downlink Received Signal Strength Indication (RSSI) outside the building with a unity gain sampling antenna. Sometimes a rooftop reading is needed to obtain a sufficient signal level. Note that it is an FCC violation to expand the normal coverage footprint of a cellular site with an in-building product. In addition, consider the impact the system will have on traffic, especially the busy hour. Confirm with the service provider that the expected increase in the volume of calls will be addressed (if needed), possibly with additional equipment such as additional channels or a microcell. Determine the Amount of Building Attenuation: If a donor antenna will provide the RF link to the BTS, determine if there is enough signal isolation between the donor antenna and the inbuilding system to avoid a feedback loop and signal degradation. This step can often be accomplished during the preliminary walkthrough. Discuss Installation with Building Management and Engineering: Discuss all initially anticipated Digivance ICS coverage areas (including any obviously desirable cable routings, equipment installations, power and mechanical requirements) with the authorized client and Page 24 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 building personnel for an initial approval/confirmation. This gives a good estimate of the extent of the system work needed. Occasionally, some of the system design work can be accomplished at this point. 2.11.2 Phase Two – System Design Determine forward and reverse path loss and then design for unity gain on the uplink and maximum power out of the DRU on the downlink: The overall purpose of the Digivance ICS is to transparently overcome attenuation losses, not to provide additional gain beyond what is required to bring the signal to unity gain. Complete the following steps to make this determination: 1. Determine the in-building reverse path (uplink) losses at typical operating frequencies and distances from the subscriber handset (terminal) to the DRU. This information will be used to determine the optimal uplink signal level to the outside world. 2. Determine the typical composite cell site Effective Radiated Power (ERP) into the system. Calculate the interface adjustment required to feed the required downlink signal level to the DHU in order to drive the DRU output signal at the desired level. Determine the location of the DHU and its RF and AC power sources: Complete the following steps to make this determination: 1. Determine where and how the DHU will be mounted. 2. Determine the location of the DHU AC power source. 3. Determine the RF source (LIU with BTS or RIU with BTS through donor antenna) for the DHU. 4. If an LIU connection with the BTS is required, determine the distance to the DHU. 5. If a RIU connection with the BTS is required, determine what type of antenna is needed and where it can be mounted. 6. Determine the attenuation or amplification requirements for the DHU to BTS interface. Discuss the design of the Digivance ICS installation with building management and engineering: Explain the proposed system design with building management and engineering personnel and obtain final design approval prior to installation. 2.11.3 Phase Three – Installation Use industry standard practices for cabling, installation, and powering to complete the following: 1. Install the DHU as described in Section 3 of this manual and adjust the RF interface levels based on the system design specifications. Additional information concerning the DHU to BTS interface is provided in the Digivance ICS Remote Interface Unit User Manual (ADCP-75-113) and in the Digivance ICS Local Interface Unit User Manual (ADCP-75-114). Page 25 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 2. Install a DRU as described in the Digital Remote Unit Installation Instructions (ADCP 75-112). If a donor antenna is used, install the DHU and RIU close to the donor antenna. 3. Conduct an initial performance evaluation and complete the following: a) Confirm proper isolation, signal quality, and power levels. b) Make test calls from DRU service area and evaluate call quality (confirm with service provider if desired). c) Address performance issues as needed. 4. Install the remaining DRUs and also any DEUs as described in the Digital Expansion Unit Installation Instructions (ADCP-75-111). Test call quality and range of each DRU as needed. 5. Check powering and alarm functions of entire system per Digivance ICS specifications. 2.11.4 Phase Four - Performance Evaluation Complete the following to evaluate the performance of the Digivance ICS: 1. Evaluate the forward path (downlink) and reverse path (uplink) RF signal levels and quality. 2. Make continuous calls from DRU to DRU, checking all service areas, seams, and coverage boundaries for call quality (both DL and UL). Address all quality issues as needed. 3. Place calls both leaving and entering the building(s), in parking lots, etc. Address all quality issues as needed. 4. Contact client/service provider to inform them when the Digivance ICS is operational. Page 26 © 2001, ADC Telecommunications, Inc.
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usermanual
FCC ID: F8I-DVICS1900-1 ADCP-75-110 • Issue 2B • July 2001 DIGITAL HOST UNIT INSTALLATION PROCEDURE This section provides the installation procedures for the DHU. Installation of the DEU(s) and DRU(s) may proceed separately from the installation of the DHU. The installation procedures for the DEU are provided in the Digital Expansion Unit Installation Instructions (ADCP -75111) which are shipped with the DEU. The installation procedures for the DRU, the DRU antennas, and the ac/dc converter (optional DRU accessory) are provided in the Digital Remote Unit Installation Instructions (ADCP-75-112) which are shipped with the DRU. When all units of the Digivance ICS have been installed, refer to Section 4 of this manual for the system power up and test procedures. 3.1 System Plan Review and Pre-Installation Cable Routing Before beginning the installation, review the system plan with the system engineer. Make sure each equipment installation site is identified and located and all cable runs are mapped out. The coaxial, DC power, and fiber optic cables may be routed between the various equipment locations before the equipment is installed. Whenever possible, route fiber optic cables through conduit or a guideway such as the FiberGuide system. Avoid routing fibers through ladder type cable racks or troughs that do not provide sufficient support to limit bending or prevent accidental damage. Tie-wrapping is not recommended as a means of securing fiber optic cables. Make sure to leave sufficient slack at each equipment location for connectorizing and cable management. The procedures for terminating the cables and for connecting the cables to the DHU are provided in the sections that follow. 3.2 Tools and Materials The following tools are required in order to complete the procedures in this section: • Box cutter • Pencil or scribe • Medium and small size flat-bladed screwdrivers • TORX screwdriver (T20 bit) • Pliers • Wire cutters • Wire stripper • Non-conductive probe (1900 MHz units only) • Tool kit for attaching RJ-45 male connectors to category 3 or 5 cable • Tool kit for attaching N-type male connectors to coaxial cable • Tool kit for attaching LC connectors to multimode fiber optic cable • Drill and assorted drill bits (wall-mount installations only) • Multimeter • Optical power meter • Laser light source Page 27 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 The following materials are required in order to complete the procedures in this section: • Wall-mount fasteners (wall-mount applications only) • #22 AWG (0.40 mm) category 3 or 5 cable (for power cable and external alarm connections) • RJ-45 male connectors (for power cable) • #18 AWG (1.00 mm) insulated stranded copper wire (for chassis grounding wire) • Ring terminal for #18 wire (for chassis ground wire connection) • 50 or 62.5 micron core multi-mode fiber optic cable • LC-type field installable connectors • High performance, flexible, low loss 50-ohm coaxial cable • N-type male connectors • Wire ties 3.3 Unpacking and Inspection This subsection provides instructions for opening the shipping boxes, verifying that all parts have been received, and verifying that no shipping damage has occurred. Use the following procedure to unpack and inspect the DHU: 1. Open the shipping carton and carefully unpack the DHU from the protective packing material. 2. Check the DHU for broken or missing parts. If there are any damages, contact ADC (see Section 6 at the end of this manual) for an RMA (Return Material Authorization) and to reorder if replacement is required. 3.4 Frequency Band Selection Procedure (1900 MHz DHU only) The 1900 MHz version of the DHU may be configured to operate at any one of four frequency bands. A DIP switch is provided on the underside of the DHU for selecting the required frequency band. Use the following procedure to set the DIP switch to provide the required 1900 MHz frequency band: 1. Determine the required frequency band for the DHU (AD, DBE, BEF, or EFC) as specified in the system design plan. 2. Orient the DHU as shown in Figure 14 and then locate the small hole in the bottom of the DHU that provides access to the band select DIP switch. 3. Use a non-conductive probe to align the DIP switch sliding handles to provide the required frequency band (see Figure 14). 4. Place the copper sticker provided with the DHU over the small opening that provides access to the DIP switch. Note: The copper sticker provides EMI/RFI shielding. Do not use some other type of material to cover the DIP switch access hole. Page 28 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 ALIGN DIP SWITCH HANDLES AS SHOWN ON THE LABEL TO PROVIDE SPECIFIED FREQUENCY BAND Fig 13-A Figure 14. 1900 MHz DHU Frequency Band Selection 3.5 Mounting Procedure The DHU may be either rack-mounted or wall-mounted. Of the procedures that follow, use which ever procedure is appropriate for the installation: Note: To insure that all optical connectors and transceivers remain dust-free during installation, leave all dust caps and dust protectors in place until directed to remove them for connection. 3.5.1 Rack Mount Installation The DHU may be mounted in either a 19-inch or 23-inch EIA or WECO equipment rack. Both US standard and metric machine screws are included for rack mounting the DHU. When loading the DHU in a rack, make sure the mechanical loading of the rack is even to avoid a hazardous condition such as a severely unbalanced rack. The rack should safely support the combined weight of all the equipment it holds. In addition, the maximum recommended ambient temperature for the DHU is 50º C (122º F). Allow sufficient air circulation or space between units when the DHU is installed in a multi-unit rack assembly because the operating ambient temperature of the rack environment might be greater than room ambient. Warning: Wet conditions increase the potential for receiving an electrical shock when installing or using electrically-powered equipment. To prevent electrical shock, never install or use electrical equipment in a wet location or during a lightning storm. Use the following procedure to install the DHU in the equipment rack: 1. The DHU is shipped with the mounting brackets installed for 19-inch rack installations. If mounting the DHU in a 19-inch rack, proceed to step 4. If mounting the DHU in a 23inch rack, proceed to step 2. 2. Remove both mounting brackets from the DHU (requires TORX screwdriver with T20 bit) Page 29 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 3. Reinstall both mounting brackets so the long side of the bracket is flush with the DHU front panel as shown in Figure 15. Use the screws removed in step 2 to re-attach the brackets to the DHU enclosure. REMOVE AND REINSTALL MOUNTING BRACKETS AS SHOWN FOR INSTALLATION IN 23-INCH RACKS 16426-A Figure 15. Installing the Mounting Brackets for 23-Inch Rack Installations 4. Position the DHU in the designated mounting space in the rack (per system design) and then secure the mounting brackets to the rack using the four machine screws provided (use #12-24 screws or M6 x 10 screws, whichever is appropriate) as shown in Figure 16. Note: Provide a minimum of 3 inches (76 mm) of clearance space on both the left and right sides of the DHU for air intake and exhaust. 16165-A Figure 16. DHU Rack Mount Installation Page 30 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 3.5.2 Wall-Mount Installation The DHU may be mounted from any flat vertical surface. It is recommended that a backer board such as 3/4-inch plywood be applied over the mounting surface to provide a secure base for attaching the DHU. Two mounting holes are provided in the cable management tray for securing the DHU to the mounting surface. The fasteners must be provided by the installer. Use the following procedure to wall-mount the DHU: Warning: Wet conditions increase the potential for receiving an electrical shock when installing or using electrically-powered equipment. To prevent electrical shock, never install or use electrical equipment in a wet location or during a lightning storm. 1. Obtain the appropriate fasteners (lag bolts, screw anchors, etc.) for securing the DHU to the mounting surface. 2. Position the DHU on the mounting surface in the specified location (per the system design) with the front panel facing up as shown in Figure 17. Note: Provide a minimum of 3 inches (76 mm) of clearance space on both the left and right sides of the DHU for air intake and exhaust. BACKER BOARD SUCH AS 3/4-INCH PLYWOOD 16427-A Figure 17. DHU Wall-Mount Installation 3. Using the DHU as a template, mark the location of the mounting holes on the mounting surface. Note: The mounting holes in the DHU cable management tray are spaced 11-21/32 inches (296 mm) center to center. Page 31 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 4. Set the DHU aside and then drill appropriately sized holes in the mounting surface for the fasteners. 5. Partially install the fasteners in the drilled holes. Leave the head of each fastener protruding about 1/4 inch (6 mm) from the mounting surface. 6. Hang the DHU from the fasteners and then securely tighten each fastener. 3.6 Chassis Ground Connection A stud is provided on the rear side of the chassis for connecting a grounding wire to the chassis. Use the following procedure to connect the grounding wire to the chassis and to route the grounding wire to an approved earth ground source: 1. Obtain a length of #18 AWG (1.00 mm) insulated stranded copper wire for use as a chassis grounding wire. 2. Terminate one end of the wire with a ring terminal. 3. Locate the chassis ground stud at the rear of the DHU as shown in Figure 18. 16169-A Figure 18. Chassis Ground Stud 4. Attach the ring end of the wire to the chassis ground stud (see Figure 18). 5. Route the free end of the chassis grounding wire to an approved (per local code or practice) earth ground source. 6. Cut the chassis grounding wire to length and connect it to the approved ground source as required by local code or practice. Note: Be sure to maintain reliable grounding for rack and wall mounted equipment. Pay particular attention to ground source connections. Page 32 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 3.7 Coaxial Cable Connections The RF interface between DHU and the BTS is supported through a pair of type N female connectors mounted on the DHU front panel. One connector provides the coaxial cable connection for the forward path (downlink) signal. The other connector provides the coaxial cable connection for the reverse path (uplink) signal. Coaxial cables link the DHU to the BTS through an interface device such as the LIU or the RIU. Use the following procedure to install the forward and reverse path coaxial cables and connect them to the DHU: 1. Obtain the required lengths of high performance, flexible, low loss 50-ohm coaxial communications cable (RG 400 or equivalent) for all coaxial connections. 2. Route the forward path and reverse path coaxial cables (if not already routed) between the DHU and the specified BTS interface device (per system design) and cut to the required length. Allow sufficient slack for dressing and organizing cables at the DHU. 3. Terminate each cable with a type N male connector following the connector supplier’s recommendations. 4. Connect the forward path cable to the RF IN connector on the DHU front panel as shown in Figure 19. 5. Connect the reverse path cable to the RF OUT connector on the DHU front panel as shown in Figure 19. TYPE-N MALE CONNECTOR RF IN CONNECTOR (FORWARD PATH) 16428-A RF OUT CONNECTOR (REVERSE PATH) Figure 19. Forward and Reverse Path Coaxial Cable Connections 6. Dress and secure cables at the DHU per standard industry practice. 7. Connect the forward and reverse path cables to the LIU (microcell) or the RIU (donor antenna) as specified in the instructions provided with that unit. 8. Complete all remaining coaxial cable connections between the LIU and the BTS or between the RIU and the donor antenna as specified in the instructions provided with the interface unit. Page 33 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 3.8 Ports 1–6 Optical Connections The optical interface between the DHU and each DEU or DRU is supported by six optical ports. Each of the six optical ports provides a duplex LC type optical transceiver which is mounted on the DHU front panel. One side of the transceiver provides the optical fiber connection for the forward path (downlink) signal. The other side of the transceiver provides the optical fiber connection for the reverse path (uplink) signal. Use the following procedure to install the forward and reverse path optical fibers and to connect them to the DHU: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Obtain the required lengths of 50 or 62.5 micron core multi-mode fiber optic cable. 2. Route the fiber optic cable between the DHU and the DEU or DRU (if not already routed) and cut to required length. Allow sufficient slack for dressing and organizing the cables at each unit. Maintain a minimum bend radius of 2 inches (50 mm). Note: The maximum distance for routing 50 micron core fiber optic cable is 750 meters (2,461 feet). The maximum distance for routing 62.5 micron core fiber optic cable is 500 meters (1,641 feet). 3. Terminate each optical fiber with a field-installable LC type fiber optic connector as shown in Figure 20. Follow the instructions provided by the connector manufacturer for installing the connector. 4. Test each fiber for optical loss as described in Subsection 5.4.2 of this manual. 5. Designate one of the fibers as the forward path link and the other as the reverse path link and attach an identification tag to each fiber end next to the connector. 6. Use the plastic joiner provided with the LC connectors to join the DHU Port 1 forward and reverse path connectors together (see Figure 20). Make sure the forward path and reverse path connectors are oriented as shown. Note: When viewing any Port 1-6 optical transceiver from the front, the forward path port is on the left and the reverse path port is on the right. 7. Remove the dust caps from the optical fiber connectors and the port 1 optical transceiver. Note: Leave the dust cap in place on any unused optical port. 8. Clean each connector (follow connector supplier’s recommendations) and then insert the optical link connector pair into DHU optical port 1 (see Figure 20). Page 34 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 OPTICAL CONNECTOR ASSEMBLY DETAIL FORWARD PATH (TX) CONNECTOR REVERSE PATH (RX) CONNECTOR CABLE GUIDE DETAIL PORT 1 OPTICAL TRANSCEIVER OPTICAL CONNECTOR DESIGNATION CARD AND CLEAR HOLDER DETAIL PLASTIC COVER CARD CABLE GUIDES 16429-B HOLDER Figure 20. Ports 1–6 Fiber Optic Cable Connections 9. Place the optical fibers within the cable guides provided on the cable management tray (see Figure 20) and then dress and secure the fibers at the DHU per standard industry practice. 10. Connect the forward and reverse path optical fibers to the DEU or the DRU as specified in the instructions provided with that unit. 11. Use the designation card provided (see Figure 20) to indicate the location and name of the DRU or DEU that is connected to the optical fibers. The designation card holder may be attached to any convenient flat surface such as the DHU cable management tray 12. Repeat steps 1–11 for each remaining optical port. 3.9 DC Power Connections The DC power interface between the DHU and each DRU is supported by six RJ-45 female connectors. Each DHU RJ-45 connector provides nominal 48 Vdc power for the associated DRU except when the DRU is powered with an ac/dc converter. A category 3 or 5 twisted pair cable is used to feed the power from the DHU to the DRU. Use the following procedure to install the DC power cable and to connect it to the DHU. 1. Obtain the required length of category 3 or 5 twisted pair cable. 2. Route the cable between the DHU and the DRU (unless already routed) and then cut to required length. Allow sufficient slack for dressing and organizing the cable at the DHU. Note: The maximum distance for routing power cable is 500 meters (1,641 feet). Page 35 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 3. Terminate each end of the cable with a male RJ-45 connector. Match the wire color to the connector pin as specified in Table 6. Caution: The DRU will be damaged if the RJ-45 connector is wired incorrectly. Table 6. RJ-45 Connector Pin Designations PIN NUMBER WIRE COLOR White/Green Green White/Orange Orange White/Blue Blue White/Brown Brown CONNECTOR PINS +48 VDC ON PINS 1, 3, 5, AND 7 RETURN ON PINS 2, 4, 6, AND 8 PIN PIN 16180-A 4. Perform a continuity test to verify that each wire is properly connected to the terminating RJ-45 connector and check the connector for correct polarity (see diagram in Table 6). 5. Connect the DC power cable to the DHU port 1 DC PWR jack as shown in Figure 21. RJ-45 CONNECTOR DETAIL RJ-45 CONNECTOR PORT 1 DC POWER CONNECTOR 16430-A CABLE GUIDE DETAIL CABLE GUIDES Figure 21. 48 Vdc Power Cable Connection Page 36 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 6. Place the DC power cable within the cable guides provided (see Figure 21) and then dress and secure the cable at the DHU per standard industry practice. 7. Connect the DC power cable to the DRU as specified in the instructions provided with that unit. 8. Repeat steps 1–7 for each remaining DRU that will be powered by the DHU. 3.10 Extermal Alarm System Connections The alarm interface between the DHU and an external alarm system is supported by a sixterminal plug (with screw-type terminals) that connects to a receptacle mounted on the DHU front panel. The terminal plug provides connections to normally open (NO) and normally closed (NC) dry type alarm contacts for both minor and major alarms. A category 3 or 5 cable is typically used to connect the DHU to the external alarm system. Use the following procedure to install the alarm wiring and connect it to the DHU: 1. Obtain the required length of category 3 or 5 cable. 2. Route the cable between the DHU and the external alarm system (if not already routed) and then cut to required length. Allow sufficient slack for dressing and organizing the cable at the DHU. 3. Strip back the outer cable sheath and insulation to expose the wires at both ends of the cable and strip back 0.2 inches (5 mm) of insulation each wire. 4. Connect the Major alarm wire pair to the MAJOR COM/NC or MAJOR COM/NO terminals (whichever is required by the external alarm system) on the DHU alarm terminal connector (supplied with DHU) as shown in Figure 22. ALARM CONNECTOR MINOR ALARM WIRES MAJOR ALARM WIRES ALARM CONNECTOR DETAIL 16370-A Figure 22. External Alarm System Connections Page 37 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 5. Connect the Minor alarm wire pair to the MINOR COM/NC or MINOR COM/NO terminals (whichever is required by the external alarm system) on the DHU alarm terminal connector as shown in Figure 22. 6. Connect the Major and Minor alarm wire pairs to the appropriate terminals on the external alarm system. 7. Dress and secure cable per standard industry practice. 3.11 AC Power Connections The AC power interface between the DHU and the AC power source is supported by a 3-wire AC power cord connector located on the DHU front panel. The AC connector provides a connection point for the power cord which is provided separately with the DHU. Use the following procedure to install the AC power cord: 1. Locate the AC power cord which is provided separately with the DHU. Use only the AC power cord provided with the DHU or an equivalent UL/CUL listed 3-conductor, 18 AWG cord terminated in a molded-on plug cap rated 125 V, 15 A with a maximum length of 6 feet (1.8 m). Note: The DHU is intended to be used with a 3-wire grounding type plug which has a grounding pin. Equipment grounding is required to ensure safe operation. Do not defeat the grounding means. Verify DHU is reliably grounded when installed. 2. Place the DHU AC power ON/OFF switch, shown in Figure 23, in the OFF position (press O). 16431-A AC POWER CORD Figure 23. AC Power Connection 3. Connect the receptacle end of the power cord to the AC connector on the DHU. 4. Route the plug end of the power cord to the specified AC outlet (per the system design) and connect plug to outlet. Warning: The current rating of the DHU is 2.0 Amps at 120 Vac. Avoid overloading circuits which may cause damage to over-current protection devices and supply wiring. Page 38 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 5. Dress and secure cable per standard industry practice. 6. When all units of the Digivance ICS have been installed, refer to Section 4 of this manual for the system power up and test procedures. 3.12 Create As-Built Drawing Following installation, create an “as-built” drawing of the complete Digivance ICS system. Using a drawing of the building floor plan, show the installed location of each piece of equipment including the various Digivance electronic units, the antennas, the interface units, and the microcell (if used). In addition, show the location and routing of all copper, coaxial, and fiber optic cable runs used with the system. Retain the as-built drawing for reference when troubleshooting or when planning for system expansion. Page 39 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 SYSTEM OPERATION This section provides guidelines for turning-up the Digivance ICS, verifying that all units are operating properly, testing to ensure that all performance requirements are satisfied, and correcting any installation problems. This process assumes that the various units that comprise the Digivance ICS have been installed in accordance with the system design plan and the BTS interface unit (LIU or RIU) has been installed and tested. The procedures for installing and testing the LIU or RIU are provided in the user manual that is shipped with the unit. 4.1 Tools and Materials The following tools and materials are required in order to complete the procedures in this section: • Portable spectrum analyzer • Portable test transmitter • Cell phone • Pencil or pen • Writing pad 4.2 Turn-Up System and Verify Operation The process of turning-up the system and verifying operation involves powering up the various system components and then verifying that the LED indicators show normal operation. Refer to Tables 7, 8, and 9 as needed for a complete description of the unit LED indicators. Use the following procedure to power-up the system. If any unit does not respond as described, refer to Subsection 4.3 for the correction procedures. 1. Temporarily disconnect the alarm system or notify alarm system provider that testing is in progress. 2. Verify that each AC powered unit is connected to the appropriate outlet. 3. Place the ON/OFF switch on the DHU in the ON position (press I). 4. Verify that the UNIT LED and the OVERDRIVE LED on the DHU turn yellow (for approximately 6 seconds) and then green. 5. Place the PORT 1 ON/OFF switch on the DHU in the ON position (press I). 6. If a DEU is connected to port 1, proceed to step 7. If a DRU is connected to port 1, skip steps 7 and 8 and proceed to step 9. 7. Place the ON/OFF switch on the DEU in the ON position (press I). 8. Verify that the UNIT LED on the DEU turns yellow (for approximately 6 seconds) and then green. 9. Verify that the PORT 1 OK/NOK LED on the DHU turns yellow (for approximately 6 seconds) and then green. Page 40 © 2001, ADC Telecommunications, Inc. FCC ID: F8I-DVICS1900-1 ADCP-75-110 • Issue 2B • July 2001 10. If a DEU is connected to PORT 1, proceed to step 11. If a DRU is connected to PORT 1, skip steps 11 through 13 and proceed to step 14. 11. Verify that the HOST PORT LED on the DEU turns green. 12. Place the PORT 1 ON/OFF switch on the DEU in the ON position (press I). 13. Verify that the PORT 1 OK/NOK LED on the DEU turns yellow (for approximately six seconds) and then green. 14. Verify that the STATUS LED on the DRU connected to PORT 1 turns yellow (for approximately six seconds) and then green. 15. Repeat the procedure covered in steps 5 through 14 for each of the remaining DHU optical ports (ports 2 through 6) that is connected to a DEU or a DRU. 16. Reconnect the alarm system and notify alarm system provider that system is operational. Table 7. Digital Host Unit LED Indicators INDICATOR UNIT LED PORT 1–6 OK/NOK LEDs COLOR DESCRIPTION Green Yellow Red Off Indicates when the DHU is normal or faulty. DHU in normal state, no faults detected. DHU in power-up state or DHU high temperature fault detected. (see Note) DHU fault detected (see Note). AC power off to DHU or DHU internal fault. Green Yellow Red Red (blinking) Off OVERDRIVE LED Green Yellow Red Indicates if any connected DEU or DRU is normal or faulty or if the optical inputs from any connected DEU or DRU are normal or lost. All connected units in normal state, no faults detected. DHU in power-up state or high temperature fault detected in DEU. (see Note) Fault detected in any connected DEU or DRU, *no reverse path optical signal from any connected DEU or DRU detected, or excessive reverse path errors detected from any connected DEU or DRU. (see Note) *No reverse path optical signal from any connected DEU or DRU detected, Port disabled (via front panel switch) or DHU internal fault. *Early versions of the DHU use a steady red LED to indicate all major fault conditions. Later versions of the DHU use a blinking red LED to indicate no optical signal received from the connected DRU or DEU. Indicates when the forward path RF input is below or above the overdrive threshold. RF input signal level at DHU below overdrive threshold. DHU in power-up state. RF input signal level at DHU above overdrive threshold. Note: Detection of any fault will generate an alarm. A high temperature fault will generate a minor alarm (yellow LED). All other types of faults will generate a major alarm (red LED). Page 41 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 8. Digital Expansion Unit LED Indicators INDICATOR COLOR UNIT LED Green Yellow Red Off HOST PORT LED Green Red (steady or blinking) Off PORT 1–6 OK/NOK LEDs Green Yellow Red Red (blinking) Off DESCRIPTION Indicates when the DEU is normal or faulty. DEU in normal state, no faults detected. DEU in power-up state or DEU high temperature fault detected. (see Note) DEU internal fault detected. (see Note) AC power off to DEU or DEU internal fault. Indicates when the optical inputs from the DHU or supporting DEU are normal or lost. DHU or supporting DEU in normal state, no faults detected. No forward path optical signal from DHU or supporting DEU detected or excessive forward path errors detected. (see Note). DEU internal fault. Indicates if any connected DEU or DRU is normal or faulty or if the optical inputs from any connected DEU or DRU are normal or lost. DRU or remote DEU in normal state, no faults detected. DEU in power-up state. Fault detected in any connected DEU or DRU, *no reverse path optical signal from any connected DEU or DRU detected, or excessive reverse path errors detected from any connected DEU or DRU. (see Note) *No reverse path optical signal from any connected DEU or DRU detected. Port disabled (via front panel switch) or DEU internal fault. *Early versions of the DEU use a steady red LED to indicate all major fault conditions. Later versions of the DEU use a blinking red LED to indicate no optical signal received from the connected DRU or DEU. Note: Detection of any fault will generate an alarm. A high temperature fault will generate a minor alarm (yellow LED). All other types of faults will generate a major alarm (red LED). Table 9. Digital Remote Unit LED Indicator INDICATOR COLOR DESCRIPTION Green Yellow Red Indicates if the DRU is normal or faulty or if the forward path optical inputs to the DRU are normal or lost. DRU in normal state, no faults detected. DRU in power-up state. DRU internal fault detected, *no forward path optical signal detected, or excessive forward path errors detected. (See Note) *No forward path optical signal from the DHU or DEU detected. STATUS LED Red (blinking) Off DC power off to DRU or DRU internal fault. *Early versions of the DRU use a steady red LED to indicate all major fault conditions. Later versions of the DRU use a blinking red LED to indicate no optical signal received from the DHU or DEU. Note: Detection of any fault will generate an alarm. A high temperature fault will generate a minor alarm (yellow LED). All other types of faults will generate a major alarm (red LED). Page 42 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 4.3 Correct Installation Problems Use the procedures outlined in Table 10 to troubleshoot various installation problems. Table 10. Troubleshooting Installation Problems PROBLEM 1 All LED indicators on the DHU or DEU stay off when the ON/OFF switch is placed in the ON position. DHU OR DEU = GREEN = RED = OFF 16432-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. AC power source is turned off. 1. Verify that the AC circuit breaker is turned on or that a functional fuse is installed. 2. Test AC power cord and repair/replace as required. 3. Replace faulty DHU or DEU 2. Faulty AC power cord. 3. Faulty DHU or DEU. PROBLEM 2 The UNIT LED indicator on the DHU or DEU is RED. DHU OR DEU = GREEN = RED = OFF 16433-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty DHU or DEU. 1. Replace faulty DHU or DEU PROBLEM 3 The OVERDRIVE LED indicator on the DHU is RED. DHU = GREEN = RED 16434-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Forward path RF input level at the DHU is too high 1. Reduce forward path gain by inserting additional attenuation in the forward path signal. PROBLEM 4 The OK/NOK LED indicator on the DHU or DEU is steady RED or blinking RED and the STATUS indicator on the corresponding DRU is GREEN. FORWARD PATH LINK DHU OR DEU DRU 3 REVERSE PATH LINK = GREEN = RED 16435-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty reverse path optical link. 2. Faulty optical transmit port at DRU. 3. Faulty optical receive port at DHU or DEU. 1. Test optical link and repair or replace as required. 2. Test DRU with optical loopback. Replace if faulty. 3. Connect optical link to another optical port at the DHU or DEU. If problem is corrected, replace the DHU or DEU. PROBLEM 5 The OK/NOK LED indicator on the DHU or DEU is GREEN and the STATUS indicator on the corresponding DRU is RED. FORWARD PATH LINK DHU OR DEU POSSIBLE CAUSE DRU 3 REVERSE PATH LINK = GREEN = RED 16436-A CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical link. (Early 1. Test optical link and repair or replace as required. version of DHU only) 2. Faulty optical receive port at DRU. 2. Replace DRU. 3. Faulty optical transmit port at DHU or DEU. 3. Connect optical link to another optical port at the DHU or DEU. If problem is corrected, replace the DHU or DEU. (continued) Page 43 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 10. Troubleshooting Installation Problems, continued PROBLEM 6 The OK/NOK LED indicator on the DHU or DEU is RED or blinking RED and the STATUS indicator on the corresponding DRU is RED or blinking RED. FORWARD PATH LINK DHU OR DEU DRU 3 REVERSE PATH LINK = GREEN = RED 16437-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Forward and reverse path optical links reversed. 2. Faulty forward and reverse path optical links. 3. Faulty DHU, DEU, or DRU. 1. Verify forward and reverse path optical connections at the DHU or DEU are correct. 2. Test optical links and repair or replace as required. 3. Replace defective unit. PROBLEM 7 The OK/NOK LED indicator on the DHU or DEU is RED or blinking RED and the HOST PORT LED indicator on the corresponding remote DEU is GREEN. FORWARD PATH LINK DHU OR DEU REVERSE PATH LINK REMOTE DEU (Port 3) = GREEN = RED = OFF 16438-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty reverse path optical link. 2. Faulty optical transmit port at remote DEU. 3. Faulty optical receive port at DHU or DEU. 1. Test optical link and repair or replace as required. 2. Replace remote DEU. 3. Replace DHU or DEU. PROBLEM 8 The OK/NOK LED indicator on the DHU or DEU is GREEN and the HOST PORT LED indicator on the corresponding remote DEU is RED or blinking RED. FORWARD PATH LINK DHU OR DEU REVERSE PATH LINK POSSIBLE CAUSE REMOTE DEU (Port 3) = GREEN = RED = OFF 16439-A CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical link. 1. Test optical link and repair or replace as required. 2. Faulty optical receive port at remote DEU. 2. Replace remote DEU. 3. Faulty optical transmit port at DHU or DEU. 3. Replace DHU or DEU. PROBLEM 9 The OK/NOK LED indicator on the DHU or DEU is RED or blinking RED and the HOST PORT LED indicator on the corresponding remote DEU is RED or blinking RED. FORWARD PATH LINK DHU OR DEU REVERSE PATH LINK REMOTE DEU (Port 3) = GREEN = RED = OFF 16440-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Forward and reverse path optical links reversed. 2. Faulty forward and reverse path optical links. 1. Switch forward and reverse path optical connections at the DHU or DEU. 2. Test optical links and repair or replace as required. PROBLEM 10 The STATUS LED indicator on the DRU stays OFF when the PORT 1-6 ON/OFF switch at the DHU or DEU is placed in the ON position or when the ac/dc converter is connected. FORWARD PATH LINK DHU OR DEU DRU 3 REVERSE PATH LINK = GREEN = RED = OFF 16441-A POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty DC power cord or plug not seated. 2. DC power cord too long. 3. Insufficient DC power output from DHU, DEU, or ac/dc converter. 1. Test DC power cord and plug. Correct as required. 2. Verify power cord does not exceed 500 meters. 3. Verify DC voltage level at DRU is between 34 and 48 Vdc. Replace DHU, DEU, or ac/dc converter if voltage is outside specified range. Page 44 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 4.4 Test System Performance Testing the performance of the system involves completing various RF tests and telephone service tests that verify if the system is functioning properly. Use the following procedure to test the system performance: 1. Verify that the forward path (downlink) input signal level at the DHU is optimized. The peak COMPOSITE forward path input signal level at the DHU should be set at –20 dBm. Note: In a CDMA system, the power level is dependent on the traffic. For optimum operation in a CDMA system, the input signal level should be set below the level of the pilot signal. Adjust level based upon observation of overload indicator during traffic peaks (busy hour). 2. Verify that the reverse path (uplink) signal level at the local BTS or donor antenna is optimized. Note that the reverse path output signal level required is dependent on service provider signal to noise requirements, ICS system noise floor, the service provider equipment, and the system configuration. 3. Check and record the Received Signal Strength Indication (RSSI) and any spurious emission levels at and between all DRU antennas. Analyze all DRUs and the DHU interface using a spectrum analyzer. 4. Plot the RSSI levels on a floor plan of the building and check against the pre-installation RSSI levels to determine the overall and average RSSI improvement attributed to the Digivance ICS. Check the entire Digivance coverage area. 5. Verify call processing and voice quality within the coverage areas. Initiate and receive multiple long and short duration calls. Document the performance and address any issues as calls are processed within the entire coverage area. Assuming a properly functioning server RF link and BTS and a properly designed and optimized ICS system, there should be no clicks, mutes, clipping, or crackles within the coverage area. In a wireless office application, hand off will not occur. 6. If the DHU interfaces with a local BTS (microcell), verify the handoff function by placing a call and confirming handoffs between the Digivance/microcell coverage area and the outdoor macrocell coverage area (macro system) and vice versa. The handoff should take place without any noticeable call quality or performance issues. 7. If the DHU interfaces with a remote BTS through a donor antenna, verify call quality by placing a call and then walking between the Digivance coverage area and an area receiving good coverage directly from the cell site base station. There should be no noticeable difference in call quality. 8. Following service provider guidelines, test the 411 and 911 links to verify the routing of emergency and special services calls on local BTS configurations. 9. Verify that the alarm reporting system functions properly by turning the DHU off. This should generate a major alarm and operate a set of alarm contacts. Check for alarm confirmation from the service provider’s local switch and Network Operations Center (NOC). A minor alarm (high temperature fault condition) can be checked by opening or closing (which ever applies) the minor alarm lead wires at the DHU. Note that this tests only the external alarm system and does not verify operation of the Digivance alarm reporting system. Page 45 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 SYSTEM MAINTENANCE PROCEDURES This section explains the alarm reporting system, provides a method for isolating and troubleshooting faults, and provides procedures for replacing the DHU or DEU cooling fans. The Digivance ICS requires no regular maintenance to insure continuous and satisfactory operation. Maintenance, as it applies to the Digivance ICS, primarily involves diagnosing and correcting service problems as they occur. When an alarm is reported, it will be necessary to follow a systematic troubleshooting procedure to locate the problem. Once the source of the problem is isolated, the appropriate corrective action can be taken to restore service. The only unit components that can be replaced are the cooling fans which mount in the DHU and DEU. The failure of any other component within a unit will required replacement of that unit. 5.1 Tools and Materials The following tools and materials are required in order to complete the procedures in this section: • ESD wrist strap • IR filtering safety glasses • Optical loopback device (such as Stratos Lightwave LC5-103-03) and LC duplex adapter • Optical power meter • Magnification device for inspecting LC connectors • Laser light source • Multimeter • Cell phone • RJ-45 circuit access tool (such as the Harris 8-wire Banjo Adapter) • Medium and small size flat-bladed screwdrivers • TORX screwdriver (T10) 5.2 Fault Detection and Alarm Reporting Detection of a fault by the Digivance ICS will generate an external alarm response. LED indicators are provided on the front panel of the various units to indicate when a fault is detected. In addition to LED indicators, the DHU also provides normally open (NO) and normally closed (NC) dry alarm contacts for reporting minor and major alarms to an external alarm system. A minor alarm is defined as a high temperature condition. A major alarm is defined as any fault condition except high temperature. When the DHU alarm contacts are connected to an external alarm system, detection of a fault will generate an alarm at the Network Operations Center (NOC). However, various types of faults may not generate an alarm response. In this case, the first indication of a problem will probably be from cell phone users reporting a loss of service or poor service. Whenever a problem is reported, whether by a external alarm system or by a call from a user, refer to Subsection 5.3 to isolate and correct the fault. Page 46 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 5.3 Fault Isolation and Troubleshooting Table 11 provides fault isolation and troubleshooting guidelines. When a problem is reported, note the type of alarm generated (minor, major, or none) and any problems that may be observed. Then check the LED indicators on the DHU and note any that are red, yellow, or off. If a Port 1–6 OK/NOK LED indicator is any color but green, check the LED indicators on the connected DEUs and/or DRUs. When the required information has been obtained, locate the problem in Table 11, check out the suggested possible causes, and take corrective action as required. Table 11. Fault Isolation and Troubleshooting Alarm Type Minor LED Indicators DHU or DEU: Problem The DHU or DEU is overheating. UNIT - Yellow - All other LEDs are green POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Air intake or exhaust openings to DHU or DEU chassis blocked. 2. Ambient temperature > 50º C/122º F. 3. Faulty fan. 1. Remove cause of air-flow blockage. 2. Reduce ambient temperature. 3. Replace fan (see Subsection 5.5). Alarm Type Major LED Indicators DHU or DEU: Problem The DHU or DEU detects an internal circuitry fault. UNIT - Red POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty DHU or DEU. 1. Replace DHU or DEU. Alarm Type Major LED Indicators DHU or DEU: DRU: Problem The DRU is not powered. OK/NOK - Red or blinking Red - All other LEDs are green STATUS - Off POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. DC power cable open. 1. Test cable for continuity and repair or replace if faulty. 2. Check DC voltage level at the DRU (see Subsection 5.4.3). Replace converter, DHU, or DEU (whichever applies) if voltage is not within 34 to 48 Vdc. 3. Replace DRU. 2. No power or insufficient power output from ac/dc power converter, DHU, or DEU. 3. Faulty DRU. Alarm Type Major LED Indicators DHU or DEU: DRU: Problem The DRU is not receiving an optical signal from the DHU or DEU. All LEDs are green STATUS - Red or blinking Red POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical link between DHU or DEU and DRU 2. Faulty optical transmit port at DHU or DEU; or faulty optical receive port at DRU. 1. Test optical link and repair or replace if faulty (see Subsection 5.4.2). 2. Test optical ports. Replace DHU, DEU, or DRU if port is faulty (see Subsection 5.4.1). (continued) Page 47 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 11. Fault Isolation and Troubleshooting, continued Alarm Type Major LED Indicators DHU or DEU: DRU: Problem The DHU or DEU is not receiving an optical signal from the DRU. OK/NOK - Red or blinking Red - All other LEDs are green STATUS - Green POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty reverse path optical link between DHU or DEU and DRU. 2. Faulty optical receive port at DHU or DEU; or faulty optical transmit port at DRU. 1. Test optical link and repair or replace if faulty (see Subsection 5.4.2). 2. Test optical ports. Replace DHU, DEU, or DRU if port is faulty (see Subsection 5.4.1). Alarm Type Major LED Indicators DHU or DEU: DRU: Problem The DHU or DEU is not receiving an optical signal from the DRU and the DRU is not receiving an optical signal from the DHU or DEU; or the DRU detects an internal circuitry fault. OK/NOK - Red or blinking Red - All other LEDs are green STATUS - Red or Blinking Red POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward and reverse path optical link between the DHU or DEU and DRU 2. Faulty DRU. 1. Test optical link and repair or replace if faulty (see Subsection 5.4.2) 2. Replace DRU. Alarm Type Major LED Indicators DHU or DEU: Supported DEU: Problem The supported DEU is not receiving an optical signal from the DHU or DEU. All LEDs are green HOST PORT - Red or blinking Red - All other LEDs are green POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward path optical link between DEU or DHU and supported DEU. 2. Faulty optical transmit port at DHU or DEU or faulty optical receive port at supported DEU. 1. Test optical link and repair or replace if faulty (see and 5.4.2). 2. Test optical ports. Replace DHU, DEU, or supported DEU if port is faulty (see Subsection 5.4.1). Alarm Type Major LED Indicators DHU or DEU: Supported DEU: Problem The DHU or DEU is not receiving an optical signal from the supported DEU. OK/NOK - Red or blinking Red - All other LEDs are green All LEDs are green POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty reverse path optical link between DEU or DHU and supported DEU. 2. Faulty optical receive port at DHU or DEU or faulty optical transmit port at supported DEU. 1. Test optical link and repair or replace if faulty (see and 5.4.2). 2. Test optical ports. Replace DHU, DEU, or supported DEU if port is faulty (see Subsection 5.4.1). Alarm Type Major LED Indicators DHU or DEU: Supported DEU: Problem The DHU or DEU is not receiving an optical signal from the supported DEU and the supported DEU is not receiving an optical signal from the DHU or DEU. OK/NOK - Red or blinking Red - All other LEDs are green HOST PORT - Red or blinking Red - All other LEDs are green POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty forward and reverse path optical link between DEU or DHU and supported DEU. 1. Test optical link and repair or replace if faulty (see and 5.4.2). (continued) Page 48 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Table 11. Fault Isolation and Troubleshooting, continued Alarm Type LED Indicators None DHU, DEU, and DRU: Problem Loss of phone service from one DRU. Service normal at all other DRUs. All LEDs are green. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. DRU antenna cable disconnected. 2. DRU antenna obstructed or misdirected. 3. DRU antenna faulty. 4. DRU faulty. 1. Re-connect DRU antenna cable to DRU. 2. Remove antenna obstruction or re-orient antenna. 3. Replace antenna. 4. Replace DRU. Alarm Type None LED Indicators DHU, DEU, and DRU: Problem Loss of phone service from all DRUs. All LEDs are green POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Faulty coaxial connection between DHU and the LIU or RIU. 2. Faulty coaxial connection between LIU and the BTS or RIU and donor antenna. 3. Faulty LIU or RIU. 4. Faulty DHU 5. Fault with cellular network or equipment. 1. Check forward path signals at the DHU. Check reverse path signals at the LIU or RIU. 2. Check forward path signals at the LIU or RIU. Check reverse path signals at the BTS or antenna. 3. Adjust or replace LIU or RIU. 4. Replace DHU. 5. Contact cell service provider and verify that cellular network and equipment is operational. Alarm Type None LED Indicators DHU, DEU, and DRU: Problem Calls may be originated and terminated but service is noisy. All LEDs indicate normal operation. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Some electrical device in the immediate vicinity is creating interference. 1. Try turning off each device that may be causing interference and see if problem corrects itself. Alarm Type None LED Indicators DHU, DEU, and DRU: Problem Sudden high rate of blocked calls (delay dial tone). All LEDs indicate normal operation. POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Too many users for the number of channels available. 2. Faulty DHU, DEU, or DRU. 1. Wait a few minutes and try dialing again. Upgrade service if additional channels are required. 2. Replace defective unit. Alarm Type None LED Indicators DHU: Problem Forward path RF input level too high. OVERDRIVE - Red POSSIBLE CAUSE CORRECTIVE ACTION/COMMENTS 1. Incorrect attenuation in forward path RF coaxial link. 1. Adjust attenuation at RIU or LIU. Page 49 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 5.4 Test Procedures 5.4.1 Optical Loopback Test Procedure A faulty optical port, a break in an optical fiber, or a fault in an optical connector will interrupt communications between fiber linked components. Use the following procedure to determine if a fault exists with an optical port or with an optical link: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Put on the IR filtering safety glasses. 2. At the DHU or supporting DEU, place the PORT ON/OFF switch for the fiber port or link to be tested in the OFF position (press O). 3. Disconnect the optical connectors at the DHU or supporting DEU optical port (near end of fiber) and place a dust cap over each connector. 4. Plug a loopback into the optical port to be tested as shown in Figure 24. OPTICAL LOOPBACK CONNECTION DETAIL 16767-A PORT 1 OPTICAL TRANSCEIVER OPTICAL LOOPBACK Figure 24. DHU/DEU Loopback Test 5. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position (press I). 6. The PORT OK/NOK LED will turn either red or green. If the LED turns red, the optical port is faulty. Replace the DHU or DEU and then recheck system operation. If the LED turns green, the optical port is good. Proceed to step 7 to continue the test procedure. Page 50 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 7. Place the PORT ON/OFF switch in the OFF position (press O). 8. Disconnect the loopback from the DHU or supporting DEU and reconnect the optical fiber connectors (remove dust caps) to the optical port. 9. Disconnect the optical connectors at the DRU optical port or remote DEU host port (far end of fiber). 10. Connect the loopback (requires LC adapters) to the optical fiber connectors. OPTICAL LOOPBACK 16768-A OPTICAL ADAPTER OPTICAL CONNECTOR Figure 25. Optical Fiber Loopback Test 11. Insert a dust plug into the DRU optical port or remote DEU host port. 12. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position (press I). 13. The PORT OK/NOK LED will turn either red or green. If the LED turns red, one of the optical fibers is faulty. Refer to Subsection 5.4.2 to isolate which fiber is at fault. If the LED turns green, the optical fibers are good. Proceed to step 14 to finish the test procedure. 14. At the DHU or supporting DEU, place the PORT ON/OFF switch in the OFF position (press O). 15. Disconnect the loopback and the optical adapters from the optical fiber connectors. 16. Place a dust cap over the connector for each optical fiber 17. Remove the dust plug from the DRU optical port or remote DEU host port. 18. Plug the loopback into the DRU optical port or DEU host port. 19. If testing a DRU that is powered by the DHU or by a supporting DEU, place the PORT ON/OFF switch in the ON position (press I). 20. The DRU STATUS LED or DEU HOST LED will turn either red or green. If the LED turns red, the optical port is faulty and the unit must be replaced. If the LED turns green, the optical port is good. Page 51 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 OPTICAL LOOPBACK CONNECTION DETAIL 16769-A OPTICAL TRANSCEIVER OPTICAL LOOPBACK Figure 26. DRU Loopback Test 21. At the DHU or supporting DEU, place the PORT ON/OFF switch in the OFF position (press O). 22. Remove the loopback and reconnect the optical fiber connectors (remove dust caps) to the DRU optical port or remote DEU host port. 23. At the DHU or supporting DEU, place the PORT ON/OFF switch in the ON position (press I). 24. Verify that the PORT OK/NOK LED turns green. 5.4.2 Optical Loss Test Procedure A break in an optical fiber or a fault with the optical connector will interrupt communications between linked components. Use the following procedure to isolate a problem with an optical fiber or optical connector: Danger: This equipment uses a Class 1 Laser according to FDA/CDRH rules. Laser radiation can seriously damage the retina of the eye. Do not look into the ends of any optical fiber. Do not look directly into the optical transceiver of any digital unit or exposure to laser radiation may result. An optical power meter should be used to verify active fibers. A protective cap or hood MUST be immediately placed over any radiating transceiver or optical fiber connector to avoid the potential of dangerous amounts of radiation exposure. This practice also prevents dirt particles from entering the transceiver or connector. 1. Put on the IR filtering safety glasses. 2. At the DHU or supporting DEU, place the PORT ON/OFF switch for the fiber link to be tested in the OFF position (press O) if not already off. 3. Disconnect the optical connectors at the DHU or supporting DEU and at the corresponding DRU or remote DEU. Page 52 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 4. Inspect the optical connectors. Verify that each connector is clean and that no scratches or imperfections are visible on the fiber end. Clean and polish the optical connector if necessary. 5. Connect a laser light source to one end of the first optical fiber and an optical power meter to the other end. 6. Verify that the power loss is within specifications (8 dB loss) for the length of the fiber installed. If the power loss is not within specifications, repair or replace the optical fiber and/or connector per local practice. 7. Repeat steps 5 and 6 for the second optical fiber. 8. Reconnect the optical connectors at the DHU or supporting DEU and the corresponding DRU or remote DEU. 9. At the DHU or supporting DEU, place the PORT ON/OFF switch for the fiber link that was tested in the ON position (press I). 5.4.3 DC Power Test Procedure The DRU is powered by 34–48 Vdc power which is supplied through the RJ-45 connector. Power to the DRU may be supplied by the DHU, DEU, or by a 120 Vac to 48 Vdc power converter (available separately as an accessory item) plugged into a properly grounded 120 Vac outlet. Use the following procedure to test the DC power cable: 1. Disconnect the DC power cable from the DRU. 2. Connect the RJ-45 circuit access tool to the DRU as shown in Figure 27. 3. Connect the DC power cable to the RJ-45 circuit access tool (see Figure 27). 16205-A POWER PORT RJ-45 CIRCUIT ACCESS TOOL POWER CONNECTOR Figure 27. Connect RJ-45 Circuit Access Tool Page 53 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 4. Using a DC voltmeter, verify that the DC voltage level is between 34 and 48 Vdc between any set of positive and negative (+/-) terminals at the RJ-45 circuit access tool as shown in Figure 28. Due to source current limiting at the DHU or DEU, low voltage can mean excess wire resistance, low source voltage, or excess remote current. Warning: The DRU uses 48 Vdc power. To avoid electric shock or burns, use extreme care when working near exposed terminals or uninsulated cables. Be careful not to touch exposed terminals or to cause a short between terminals when checking voltage levels. TEST POINTS (+) (-) TEST POINTS (+) (-) 16206-A Figure 28. RJ-45 Circuit Access Tool Pin/Wire Designations 5. Disconnect RJ-45 circuit access tool from the DRU. 6. Use the DC voltmeter to check for open pin connections by checking for voltage between the +/– pairs on the RJ-45 circuit access tool (see Figure 28). 7. Disconnect the DC power cable from the RJ-45 circuit access tool. 8. Re-connect DC power cable to the DRU. 5.5 DHU or DEU Fan Replacement Procedure It is recommended that the fans (catalog # DGVI-100000FAN) be replaced every five years. Replacement of a fan requires that the DHU or DEU be turned off for a short period of time. This will drop all existing calls, cause a temporary loss of service, and generate a major alarm. Use the following procedure to replace the cooling fans within the DHU or the DEU: 1. Before touching the DHU or DEU or handling a fan, slip on an Electro-Static Discharge (ESD) wrist strap and connect the ground wire to an earth ground source. Wear the ESD wrist strap while completing each section of the fan installation procedure. Warning: Electronic components can be damaged by static electrical discharge. To prevent ESD damage, always wear an ESD wrist strap when working on the DHU or DEU and when handling electronic components. 2. Observe the fans (located on right side of enclosure) to determine which fan requires replacement. The faulty fan may be stopped, running at a reduced speed, or the fan bearing may be noisy. Note: Because the Mean Time Between Failures (MBTF) is the same for both fans, it may be more efficient to replace both fans at the same time. 3. Notify the NOC or alarm monitoring system operator that the system is going offline. Page 54 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 4. Place the DHU or DEU AC power On/Off switch (see Figure 3 or Figure 7) in the OFF position (press O). 5. Remove the six flat-head screws (requires TORX screwdriver with T15 bit) that secure the fan/grill assembly to the side of the enclosure as shown in Figure 29 and save for reuse. 6. Carefully withdraw the fan/grill assembly from the enclosure until the wiring harness is exposed and the connectors are accessible. 7. Lift the small latch on each wiring harness connector (see Figure 29) and carefully unplug each connector from the circuit board connector. 16172-B Figure 29. Fan/Grill Assembly Removal 8. Remove the four plastic rivets that secure the faulty fan to the grill by pushing outward on rivet center post until the rivet can be withdrawn from the grill as shown in Figure 30. 9. Remove the faulty fan(s) from the grill and then locate the replacement fan(s). 10. Use the rivets removed in step 8 to secure the replacement fan to the grill. Orient the fan so the wiring harness is on the top and the arrow on the fan housing faces into the enclosure. 11. Connect the two wiring harness connectors to the circuit board connectors. 12. Secure the fan/grill assembly to the side of the enclosure (see Figure 29) using the six flat-head screws removed in step 5. Page 55 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 16173-B Figure 30. Removing Fan From Grill 13. Place the DHU or DEU AC power On/Off switch in the ON position (press I). 14. Verify that the fans run properly following power up. 15. Notify the NOC or alarm monitoring system operator that the system is going back online. Page 56 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 GENERAL INFORMATION 6.1 Warranty/Software The Product and Software warranty policy and warranty period for all ADC products is published in ADC’s Warranty/Software Handbook. Contact the Broadband Connections Group (BCG) Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3000 (outside U.S.A. and Canada) for warranty or software information or for a copy of the Warranty/Software Handbook. 6.2 Software Service Agreement ADC software service agreements for some ADC Products are available at a nominal fee. Contact the BCG Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3000 (outside U.S.A. and Canada) for software service agreement information. 6.3 Repair/Exchange Policy All repairs of ADC Products must be done by ADC or an authorized representative. Any attempt to repair or modify ADC Products without authorization from ADC voids the warranty. If a malfunction cannot be resolved by the normal troubleshooting procedures, contact BCG Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3000 (outside U.S.A. and Canada). A telephone consultation can sometimes resolve a problem without the need to repair or replace the ADC Product. If, during a telephone consultation, ADC determines the ADC Product needs repair, ADC will authorize the return of the affected Product for repair and provide a Return Material Authorization number and complete shipping instructions. If time is critical, ADC can arrange to ship the replacement Product immediately. In all cases, the defective Product must be carefully packed and returned to ADC. 6.4 Repair Charges If the defect and the necessary repairs are covered by the warranty, and the applicable warranty period has not expired, the Buyer’s only payment obligation is to pay the shipping cost to return the defective Product. ADC will repair or replace the Product at no charge and pay the return shipping charges. Otherwise, ADC will charge a percentage of the current Customer Product price for the repair or NTF (No Trouble Found). If an advance replacement is requested, the full price of a new unit will be charged initially. Upon receipt of the defective Product, ADC will credit Buyer with 20 percent of full price charged for any Product to be Out-of-Warranty. Products must be returned within (30) days to be eligible for any advance replacement credit. If repairs necessitate a visit by an ADC representative, ADC will charge the current price of a field visit plus round trip transportation charges from Minneapolis to the Buyer’s site. Page 57 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 6.5 Replacement/Spare Products Replacement parts, including, but not limited to, button caps and lenses, lamps, fuses, and patch cords, are available from ADC on a special order basis. Contact BCG Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-9463475 (outside U.S.A. and Canada) for additional information. Spare Products and accessories can be purchased from ADC. Contact Sales Administration at 1-800-366-3891, extension 63000 (in U.S.A. or Canada) or 952-946-3000 (outside U.S.A. and Canada) for a price quote and to place your order. 6.6 Returned Material Contact the ADC Product Return Department at 1-800-366-3891, extension 63748 (in U.S.A. or Canada) or 952-946-3748 (outside U.S.A. and Canada) to obtain a Return Material Authorization number prior to returning an ADC Product. All returned Products must have a Return Material Authorization (RMA) number clearly marked on the outside of the package. The Return Material Authorization number is valid for 90 days from authorization. 6.7 Customer Information and Assistance For customers wanting information on ADC products or help in using them, ADC offers the services listed below. To obtain any of these services by telephone, first dial the central ADC telephone number, then dial the extension provided below. The central number for calls originating in the U.S.A. or Canada is 1-800-366-3891. For calls originating outside the U.S.A. or Canada, dial country code “1” then dial 952-946-3000. Sales Assistance Extension 63000 • Quotation Proposals • Ordering and Delivery • General Product Information Systems Integration Extension 63000 • • • • • • • Complete Solutions (from Concept to Installation) Network Design and Integration Testing System Turn-Up and Testing Network Monitoring (Upstream or Downstream) Power Monitoring and Remote Surveillance Service/Maintenance Agreements Systems Operation BCG Technical Assistance Center Extension 63475 E-Mail: bcg_tac@adc.com • • • • • • Technical Information System/Network Configuration Product Specification and Application Training (Product-Specific) Installation and Operation Assistance Troubleshooting and Repair Product Return Department Extension 63748 E-Mail: repair&return@adc.com • ADC Return Authorization number and instructions must be obtained before returning products. Product information may also be obtained using the ADC web site at www.adc.com or by writing ADC Telecommunications, Inc., P.O. Box 1101, Minneapolis, MN 55440-1101, U.S.A. Page 58 © 2001, ADC Telecommunications, Inc. ADCP-75-110 • Issue 2B • July 2001 Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice. In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits and ADC further disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of liability applies to all products, publications and services during and after the warranty period. This publication may be verified at any time by contacting ADC’s Technical Assistance Center at 1-800-366-3891, extension 63475 (in U.S.A. or Canada) or 952-946-3475 (outside U.S.A. and Canada), or by e-mail to bcg_tac@adc.com. © 2001, ADC Telecommunications, Inc. 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