Corning Optical Communication 1MRU21-3 MRU-Mid Power Remote Unit with AWS-3 Support User Manual

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Corning
Mid-Power Remote Unit (MRU)
User Manual
Warranties
Hardware Warranty
Corning warrants to the original purchaser (“Customer”)
that for the duration of the warranty period, one (1) year,
commencing on the date of shipment of the Hardware, unless
otherwise agreed in writing by Corning (the “Hardware
Warranty Period”), the Hardware furnished by Corning
shall be free in all material respects from defects in material
and workmanship, and shall conform to the applicable portions
of the Specifications, as defined below (the “Hardware
Warranty”). If notified by Customer of any such defects
in material or workmanship or nonconformity with applicable
portions of the Specifications within the Hardware Warranty
Period, Corning shall promptly, at its own election and
expense, repair or replace any such Hardware proven to be
defective under the terms of this Hardware Warranty. Such
repair or replacement shall be Customer’s sole remedy and
Corning sole obligation in the event this Hardware Warranty
is invoked. If any components comprising a part of the
Hardware are replaced or repaired during the Hardware
Warranty Period, the Hardware Warranty Period for such
repaired or replaced components shall extend to the longer
of (i) the balance of the Hardware Warranty Period or (ii)
three (3) months from the date of repair or replacement. For
purposes of this Warranty, “Specifications” shall mean the
specifications and performance standards of the Products as
set forth in documents published by Corning and delivered to
Customer which contain technical specifications or
performance standards for the Products.
If Customer invokes this Hardware Warranty, it shall notify
Corning promptly of the claimed defect. Customer will allow
Corning to inspect the Hardware at Customer’s location, or
to return the Hardware to Corning closest repair facility. For
Hardware returned to Corning repair facility, Customer shall
be responsible for payment of all transportation and freight
costs (including insurance) to Corning’s repair facility, and
Corning shall be responsible for all transportation and freight
costs (including insurance) incurred in connection with
the shipment of such Hardware to other repair facilities of
Corning and/or its return to Customer.
Notwithstanding the foregoing, in no event will Corning
be liable for damage to Products resulting from improper
handling during or after shipment, misuse, neglect, improper
installation, operation or repair (other than by authorized
Corning personnel), alteration, accident, or for any other
cause not attributable to defects in materials or workmanship
on the part of Corning. Corning shall not reimburse or make
any allowance to Customer for any labor charges incurred by
Customer for replacement or repair of any goods unless such
charges are authorized in advance in writing by Corning.
Software Warranty
Corning warrants to the original purchaser (“Customer”) that
for the duration of the warranty period, one (1) year,
commencing on the date of shipment of the Software, unless
otherwise agreed in writing by Corning (the “Software
Warranty Period”), the Software shall conform with, and
perform the functions set forth in the Specifications, and
shall be free from defects in material or workmanship (the
“Software Warranty”). In the event the Software is proven
to be defective under the terms of this Software Warranty,
Corning shall correct such defects or failure and ensure that
the Software conforms with, and performs the functions set
forth in, the Specifications. Customer will allow Corning to
inspect the Software at Customer’s location or to return it to
Corning’s closest repair facility.Notwithstanding the foregoing,
Corning shall have no obligation under the Software Warranty if
the Software is modified or used with hardware or software not
supplied or approved by Corning or if the Software is subject to
abuse, improper installation or application, accident, electrical
or environmental over-stress, negligence in use, storage,
transportation, or handling Third-party software distributed
with the Software may carry certain warranties which, to the
maximum extent allowed by law, Corning hereby assigns,
transfers and otherwise conveys to Customer, provided,
however, that Corning itself provides no warranty of any
kind, express, implied, statutory or otherwise, for any
third-party software provided hereunder.
Corning does not warrant any hardware, software, or
services not provided by Corning.
THIS WARRANTY IS THE ONLY WARRANTY MADE
BY CORNING AND IS IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. CORNING SHALL NOT BE
LIABLE FOR ANY OTHER DAMAGE INCLUDING,
BUT NOT LIMITED TO, INDIRECT, SPECIAL OR
CONSEQUENTIAL DAMAGES ARISING OUT OF OR
IN CONNECTION WITH FURNISHING OF GOODS,
PARTS AND SERVICE HEREUNDER, OR THE
PERFORMANCE, USE OF, OR INABILITY TO USE
THE GOODS, PARTS, AND SERVICE. CORNING
SALES AGENTS OR REPRESENTATIVES ARE NOT
AUTHORIZED TO MAKE COMMITMENTS ON
WARRANTY RETURNS.
User Manual | CMA-438-AEN | Page 2 of 44
Returns
In the event that it is necessary to return any product
against above warranty, the following procedure shall be
followed:
1. Return authorization is to be received from Corning
prior to returning any unit. Advise Corning of the
model, serial number, and discrepancy. The unit may
then be forwarded to Corning, transportation prepaid.
Devices returned collect or without authorization may
not be accepted.
2. Prior to repair, Corning will advise the customer of
our test results and any charges for repairing customercaused problems or out-of-warranty conditions etc.
3. Repaired products are warranted for the balance of the
original warranty period, or at least 90 days from date
of shipment.
Limitations of Liabilities
Corning’s liability on any claim, of any kind, including
negligence for any loss or damage arising from, connected
with, or resulting from the purchase order, contract,
quotation, or from the performance or breach thereof, or
from the design, manufacture, sale, delivery, installation,
inspection, operation or use of any equipment covered by
or furnished under this contact, shall in no case exceed the
purchase price of the device which gives rise to the claim.
Except as expressly provided herein, Corning makes
no warranty, expressed or implied, with respect to any
goods, parts, and services provided in connection with
this agreement including, but not limited to, the implied
warranties of merchantability and fitness for a particular
purpose. Corning shall not be liable for any other
damage including, but not limited to, indirect, special or
consequential damages arising out of or in connection with
furnishing of goods, parts and service hereunder, or the
performance, use of, or inability to use the goods, parts,
and service.
Note: The grantee is not responsible for any changes
or modifications not expressly approved by the party
responsible for compliance. Such modifications could
void the user's authority to operate the equipment.
Reporting Defects
The units were inspected before shipment and found to be
free of mechanical and electrical defects. Examine the units
for any damage that may have been caused in transit.
If damage is discovered, file a claim with the freight carrier
immediately. Notify Corning as soon as possible in writing.
Note: Keep all packing material until you have completed
the inspection.
Warnings and Admonishments
There may be situations, particularly for workplace
environments near high-powered RF sources, where
recommended limits for safe exposure of human beings
to RF energy could be exceeded. In such cases, restrictive
measures or actions may be necessary to ensure the safe use
of RF energy.
The equipment has been designed and constructed to
prevent, as far as reasonably, practicable danger. Any
work activity on or near equipment involving installation,
operation or maintenance must be, as far as reasonably, free
from danger.
Where there is a risk of damage to electrical systems
involving adverse weather, extreme temperatures, wet,
corrosive or dirty conditions, flammable or explosive
atmospheres, the system must be suitably installed to
prevent danger. Equipment provided for the purpose of
protecting individuals from electrical risk must be suitable
for the purpose and properly maintained and used. This
covers a range of activities including lifting, lowering,
pushing, pulling, carrying, moving, holding, or restraining
an object, animal, or person from the equipment. It also
covers activities that require the use of force or effort, such
as pulling a lever or operating power tools.
Where some of the above mentioned activities are required,
the equipment must be handled with care to avoid being
damaged.
Observe standard precautions for handling ESD-sensitive
devices. Assume that all solid-state electronic devices are
ESD sensitive. Ensure the use of a grounded wrist strap
or equivalent while working with ESD-sensitive devices.
Transport, store, and handle ESD-sensitive devices in staticsafe environments.
Regulatory Compliance Information
WARNINGS!
•	This is NOT a CONSUMER device. It is designed for
installation by FCC LICENCEES and QUALIFIED
INSTALLERS. You MUST have an FCC LICENSE or
express consent of an FCC license to operate this device.
Unauthorized use may result in significant forfeiture
penalties, including penalties in excess of $100,000 for
each continuing violation.
User Manual | CMA-438-AEN | Page 3 of 44
•	
ANTENNAS: Use only authorized and approved
antennas, cables, and/or coupling devices! The use
of unapproved antennas, cables, or coupling devices
could cause damage and may be of violation of FCC
regulations. The use of unapproved antennas, cables,
and/or coupling devices is illegal under FCC regulations
and may subject the user to fines. See Section 3.6 of this
document.
RF Safety
To comply with FCC RF exposure compliance requirements:
ATTENTION!
Compliance with RF safety requirements:
•	Corning products have no inherent significant RF
radiation.
•	The RF level on the downlink is very low at the downlink
ports. Therefore, there is no dangerous RF radiation when
the antenna is not connected.
CAUTION!
Use of controls, adjustments, or performance of procedures
other than those specified herein may result in hazardous
radiation exposure.
Warning! Antennas used for this product must be fixed
mounted on indoor permanent structures, providing a
separation distance of at least 100 cm from all persons
during normal operation.
Warning! Each individual antenna used for this
transmitter must be installed to provide a minimum
separation distance of 100 cm or more from all persons
and must not be co-located with any other antenna for
meeting RF exposure requirements.
Warning! Antenna gain should not exceed 12.5 dBi.
Warning! The design of the antenna installation needs
to be implemented in such a way so as to ensure RF
radiation safety levels and non-environmental pollution
during operation.
Laser Safety
•	Fiber optic ports of the Corning optical network evolution
(ONE™) solutions emit invisible laser radiation at the
1310/1550 nm wavelength window.
•	Only technicians familiar with fiber optic safety practices
and procedures should perform optical fiber connections
and disconnections of Corning optical network evolution
(ONE) solutions devices and the associated cables.
•	Corning optical network evolution (ONE) solutions MRU
has been tested and certified as a Class 1 laser product to
IEC/EN 60825-1 (2007). It also meets the requirements
for a Hazard Level 1 laser product to IEC/EN 608252:2004 to the same degree.
•	Corning optical network evolution (ONE) solutions MRU
complies with 21 CFR 1040.10 and 1040.11 except for
deviations pursuant to Laser Notice No. 50 (2007).
Care of Fiber Optic Connectors
•	Do not remove the protective covers on the fiber optic
connectors until a connection is ready to be made.
Do not leave connectors uncovered when not connected.
•	The tip of the fiber optic connector should not come
into contact with any object or dust.
Company Certification
ISO 9001:2000 and ISO 13485:2003
Licensee Contact Information
Industrial boosters may only be used by FCC licensees or
those given express (individualized) consent of license.
Corning Optical Communications Wireless certifies all
of the VARs listed as licensed installers for Corning. For
the list of licensed VARs, please contact the Tech Support
Hotline: 410-553-2086 or 800-787-1266.
About This Manual
This user guide provides all the information necessary to
understand the architecture and general installation procedures
and requirements of the Corning optical network evolution
(ONE) solutuions mid-power remote unit (MRU).
Note: The commissioning procedure, monitoring and
management capabilities, and configuration options of
Corning optical network evolution (ONE) solutions elements
are described in the Corning optical network evolution
(ONE) solutions HCM and Web management user manual.
•	External optical power is less than 10 mW, internal
optical power is less than 500 mW.
•	To avoid eye injury never look directly into the optical
ports, patch cords, or optical cables. Do not stare into
beam or view directly with optical instruments. Always
assume that optical outputs are on.
User Manual | CMA-438-AEN | Page 4 of 44
1
Introduction
CHAPTER
CHAPTER
Table of Contents
Installation Guidelines
1.1 Key Features and Capabilities  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 8
3.1 Site Considerations  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .15
1.2 General System Specifications and Requirements  .  . 9
3.2 Safety Guidelines  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 15
1.2.1 Environmental and Regulatory
				 Specifications  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 9
3.3 Installation Requirements  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 15
1.2.2 Safety and Regulatory Approvals  .  .  .  .  .  .  .  . 9
1.2.3 Power Specifications   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 9
3.3.1
Rack Safety Instructions  .  .  .  .  .  .  .  .  .  .  .  .  16
3.3.2
Rack Installation Guidelines  .  .  .  .  .  .  .  .  .  . 16
3.4 Power Requirements  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 16
3.4.1
Power Safety Instructions  .  .  .  .  .  .  .  .  .  .  .  16
1.4 System Monitoring and Management   .  .  .  .  .  .  .  .  11
3.4.2
Types of Power Supplies  .  .  .  .  .  .  .  .  .  .  .  .  16
3.4.3
Circuit Breakers  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 16
3.4.4
Cable Routing .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  16
CHAPTER
1.3 System Architecture  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  10
3.5 RF Coaxial Cable Guidelines  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 17
MRU Interfaces
MRU Interfaces .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  12
3.5.1
General RF Cable Installation Procedures  .  17
3.5.2
RF Rules  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 17
3.5.3
Coax Cable Lengths and Losses  .  .  .  .  .  .  .  . 17
3.6 Antenna Specifications and Guidelines  .  .  .  .  .  .  .  . 18
3.6.1 Authorized Antennas and Required
				 Specifications   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  18
3.6.2 General Installation Guidelines  .  .  .  .  .  .  .  .  .  18
3.7 Fiber Optic Requirements   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  18
3.7.1 Authorized Optical Cables   .  .  .  .  .  .  .  .  .  .  .  .  18
3.7.2 Fiber Optic Rules   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  18
3.8 Grounding Requirement  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  19
3.9 Manual Handling  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 19
User Manual | CMA-438-AEN | Page 5 of 44
Table of Contents
Installation
CHAPTER
CHAPTER
(continued)
Appendix A:
Specifications
4.1 Unpacking and Inspection  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 20
Supported Services  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  40
4.2 Mounting the MRU  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 21
RF Parameters per Service  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  40
4.2.1		 Rack Installation . . . . . . . . . . . . . . . . . 21
Coupling Specifications  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  41
4.2.2		 Wall-Mount Installation  .  .  .  .  .  .  .  .  .  .  .  .  22
Environmental Specifications  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  41
4.2.2.1 Unpacking and Inspection  .  .  .  .  .  .  .  . 22
Standards and Approvals .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  41
4.2.2.2 Mounting MRU on Wall  .  .  .  .  .  .  .  .  .  . 23
Optical Specifications  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 41
4.3 Grounding MRU Chassis  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  25
Physical Specifications  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  42
4.4 Fiber Connections  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  26
4.6 Power Connections  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 28
4.6.1		 AC Models . . . . . . . . . . . . . . . . . . . . . 28
4.6.2		 DC Models  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 28
4.6.2.1 CLASS2 Connector (remote feed)  .  .  .  28
4.6.2.2 CLASS1 Connector (local plant feed)  .  30
4.7 Outdoor Installation . . . . . . . . . . . . . . . . . . . . 31
4.7.1		 Items Required for Outdoor Installation   .  31
4.7.2		 Pre-Installation Procedures  .  .  .  .  .  .  .  .  .  .  33
4.7.3		 Install MRU in Cabinet  .  .  .  .  .  .  .  .  .  .  .  .  .  34
4.7.4		 MRU Connections  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  35
4.7.5		 External Alarm Connections  .  .  .  .  .  .  .  .  .  36
CHAPTER
4.8 Verifying Normal Operation  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 38
CHAPTER
4.5 RF Antenna Connections  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  27
Appendix B:
Ordering Information
MRU Assembly Configurations  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  43
MRU Assembly Configurations Upgrade for
Future AWS1/3 Support  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 43
MRU Stand-Alone Modules   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  44
Accessories  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  44
Cable Assemblies   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  45
Maintenance
5.1 Extracting/Replacing PAM and OPTM   .  .  .  .  .  .  .  .  39
User Manual | CMA-438-AEN | Page 6 of 44
The MRU is a mid-power (2 W) remote solution for the
Corning optical network evolution (ONE™) solutions.
The MRU provides remote indoor and outdoor coverage.
It is a fiber-fed, compact, and scalable multiservice
solution designed to complement the Corning optical
network evolution (ONE) solutions by providing complete
RF open space coverage for large-scale public venues such
as campus applications.
CHAPTER
Introduction
The MRU consists of a compact enclosure that houses the
RF modules, power elements, and the required interfaces,
supporting up to seven bands in various combinations.
It enables multiple wireless technologies and operator
services to be distributed over a single broadband
infrastructure. The MRU can be deployed in new sites
or alongside existing lower-power RAU/RAU5 remotes,
sharing a common headend and element management
system. Alongside Corning optical network evolution
(ONE) solutions deployments, the MRU provides a
comprehensive indoor and outdoor coverage solution for
varying site requirements, supporting everything from
high-rise buildings and campus topologies to stadiums and
airports.
Management and configuration options are provided for
each MRU service via a Web session to the headend
control module (HCM v1.6 and higher). The HCM enables
centralized, single-source local and remote management of
all system elements.
User Manual | CMA-438-AEN | Page 7 of 44
Mid-Power Remote Unit (MRU) | Figure 1-1
1.1 Key Features and
Capabilities
• Multi-frequency/multiservice platform – supports LTE
700, ESMR, CELL, PCS, AWS, and WCS (including an
integrated 2.5 GHz add-on port), accommodating GSM,
CDMA, UMTS, LTE, and more.
•	
Multioperator-optimized platform – services from a
number of operators can be distributed by the same unit.
•	
Cost-effective higher power – optimizes and reduces
the number of antennas required to cover open areas
by offering up to 33 dBm (2 W) composite power per
frequency band.
•	
Modular and scalable design – modular design enables
adding new wireless services easily and cost-effectively
without disruption to workspaces or existing services.
Supports external 2.5 GHz RF source.
•	
Simple installation and maintenance – all connections
and status LEDs located on the front panel. MRU is
modular, hot swappable, and field upgradable.
•	
Management and control – alarm forward to NOC or
standard element management system (EMS) via SNMP,
software controlled output power, and optical link auto
gain control.
•	
Operator-grade performance – advanced signal
handling, RF filtering, and management ensures
operator-grade performance.
•	
Optical fiber savings – all services routed to an MRU
are routed over a single optical fiber pair.
•	
Design and deployment flexibility – MRU available
in AC or DC power supply options. Antenna splitting
schemes are possible due to the higher power output
capability.
User Manual | CMA-438-AEN | Page 8 of 44
1.2 General System
Specifications and Requirements
1.2.1 Environmental and Regulatory
Specifications
Temperature
Operating
Storage
-40° to +65°C (-40° to 149°F)
-30° to 85°C (-22° to 185°F)
Table 1‑1. Temperature and Humidity Specifications
1.2.2 Safety and Regulatory Approvals
Regulation/Standard
Category
Approval
Laser Safety
FDA/CE 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser Notice
No. 50 and IEC 60825-1
EMC
FCC 47 CFR Part 15, 22, 24, 27
Safety
UL 60950
IEC 60825-1:2007
IEC 60825-2:2010
CAN/CSA-C22.2 No. 60950-1-03
NEBS
GR-63, GR-1089 (with outdoor enclosure)
Table 1-2. Safety and Regulatory Approvals
1.2.3 Power Specifications
Power Specification
Description
Power Consumption (maximum)
360 W (for fully loaded chassis)
AC Power Input
100-240 VAC/50-60 Hz
Maximum AC Current Consumption
5A
DC Power Input
DC class 1: 48 VDC (40-60 VDC), 9 A maximum
DC class 2: 24/48 VDC (20-60 VDC)
Power amplifier consumption per pair: 50 W
Maximum power consumption: 330 W
Maximum current consumption: 1.75 A per pair
Maximum current draw per pair: 64 W
Table 1-3. MRU Power Specifications
User Manual | CMA-438-AEN | Page 9 of 44
1.3 System Architecture
Figure 1‑2 illustrates the MRU system architecture. In
the downlink, at the headend, BTS/BDA RF signals are
conditioned by service-specific RIMs installed in the
headend unit (i.e. HEU/IHU), ensuring a constant RF level.
The conditioned signals are then forwarded to the OIU and
converted by the OIMs to an optical signal for transporting
over single-mode fiber to the MRUs at the remote locations.
All mobile services are combined and distributed through a
single antenna port over the broadband antenna infrastructure
installed at the remote locations. In the uplink, the process is
reversed. As illustrated in the system architecture shown in
Figure 1‑2, all mobile services are combined and distributed
through a single antenna port over the broadband antenna
infrastructure installed at the remote locations.
System Architecture | Figure 1-2
User Manual | CMA-438-AEN | Page 10 of 44
1.4 System Monitoring
and Management
The MRU is centrally managed via the headend control
module software management application (v1.6 and higher).
Figure 1-3 shows the management tabs of the selected
MRU. Refer to the “Headend Control Module (HCM) and
Web Management GUI v1.6” user manual (CMA-423-AEN)
for information on how to configure and manage the MRU.
Example of MRU Management GUI (SW v1.6) | Figure 1-3
User Manual | CMA-438-AEN | Page 11 of 44
This chapter provides detailed descriptions of the MRU
chassis and main modules and interfaces. This content
includes port and LED interface descriptions. The MRU
comprises the following main modules:
•	Power amplifier modules (PAM) – internal servicespecific power amplifier module that interfaces to an
optical interface module (OIM) at the headend site via
a single-mode pair and supports one service. MRU
supports up to seven bands. The PAM provides the
additional amplification on the DL signals routed from
the OIM toward the multiplexer. PAMs are pre-installed
in designated slots according to supported band.
•	Multiplexer – combines the UL and DL RF signals of
the supported services in addition to external RF signal
(future option for connecting to external 2.5 GHz signal
source) while providing the proper filtering into a single
duplexed antenna port.
CHAPTER
MRU Interfaces
•	Optical Module – includes the fiber optic, RF expansion,
and external alarm interfaces.
•	Power supply module (PSM) – local AC or remote DC
power feed (model dependent).
•	Fan module (FAM) – integrated fan module comprised of
four fans which are also monitored via the Web GUI.
The MRU includes front panel interfaces (e.g. antenna,
fiber optic connections, and LED status indicators) as
well as status indicators per each internal module (which
are accessed by opening the cabinet door). The following
sections provide details on the front panel and internal
module interfaces.
MRU Main Modules | Figure 2-1
User Manual | CMA-438-AEN | Page 12 of 44
The MRU front panel includes the RF and fiber optic
interfaces in addition to the system level status LEDs and
service maintenance ports. The internal PAMs each include
a PWR/STS LED.
MRU External Interfaces | Figure 2-2
Port
Description
ANTENNA PORT
4.3-10 type duplexed RF antenna port
TEST PORT
QMA coupling test port used for UL and DL measurements during system operation
2.5 GHz INPUT PORT
N/A (future option); 4.3-10 type RF port for 2.5 GHz external RF source
GND
One two-hole, standard barrel grounding lug (refer to Appendix A: Specifications
for grounding lug specifications)
User Manual | CMA-438-AEN | Page 13 of 44
Port
Description
PSM Power Connector
Model dependent:
AC models – AC connector connected to power source using provided AC power
cable only
DC models – two types of terminal block connectors:
•	CLASS2 (default) – two “DC In” 8-pin terminal block connectors for remote
feed: one pair for each PAM (total of five pairs) and one pair for the FAM and
OPTM; one RSV pair
• CLASS1 – one “DC-In” 2-pin terminal block for local plant feed
Exp. UL/DL
SMA RF ports for UL and DL connections to add-on unit (supporting any band across
the supported spectrum: 300 MHz to 3 GHz)
List. Mode
N/A
OPTIC
LC APC port for single-mode fiber connection
MGMT
RJ45 Ethernet connection for MRU local management connection
External Alarms
DB9 female external alarm connector for external dry contact alarm connections
Exp.
RJ45 Ethernet connection for add-on local craft
Table 2-1. MRU Interface Ports
LED
Description
PWR
Steady green:	Required power is supplied to MRU chassis
Off:
RUN
STS
No power input detected
Blinking green: Unit is running and operational
Rapid blinking
green:
“Identify” feature has been enabled via the management GUI
Off:
No power input detected
Steady green:
Normal operation; overall status OK
Steady red:
Indicates generated alarm in unit
Blinking red:	“Over temperature” alarm active, indicates temperature has
exceeded threshold (with door open)
Note: Temperature alarm is set as first priority and overrides any other alarm indicator.
FAM
LINK
(PAM)
Steady green:
All four fans are operating at normal speed (fan alarms clear)
Steady red:
Fault detected in at least one fan (fan alarm set)
Steady green:
Optical link level from optical module above normal threshold
Steady red:
Optical link level is lower than normal threshold
Steady green:
Power and status of power amplifier module OK. No alarms active
Steady red:
One or more alarms are active
Table 2-2. MRU LED Descriptions
User Manual | CMA-438-AEN | Page 14 of 44
CHAPTER
Installation Guidelines
This chapter provides installation guidelines for the
Corning optical network evolution (ONE™) solutions MRU.
The following installation rules are based on the assumption
that the site survey and installation planning (including
power requirements) have been completed. This preparation
includes planning the distribution of antennas to provide
the required coverage, as well as planning the layout of the
devices and cables in the telecom closet or shaft.
3.1 Site Considerations
•	The distance between the MRU service antenna and the
coverage area should correspond to line of sight (LoS)
requirements for maximum coverage area.
3.3 Installation Requirements
• Mounting surface shall be capable of supporting the
weight of the equipment.
•	In order to avoid electromagnetic interference, a
proper mounting location must be selected to minimize
interference from electromagnetic sources such as large
electrical equipment.
• Working space available for installation and maintenance
for each mounting arrangement.
• Ensure unrestricted airflow.
• The maximum fiber path loss is 5 dB.
• Ensure grounding connector is within reach of the
ground wire.
•	The system delay of the optical system must be taken
into consideration when there are neighboring BTS sites
overlapping in coverage.
• Ensure a power source is within reach of the power cord
and the power source has sufficient capacity.
3.2 Safety Guidelines
• Where appropriate, ensure unused RF connectors are
terminated.
Before installing the equipment, review the following safety
information:
• Do not locate the equipment near large transformers or
motors that may cause electromagnetic interference.
• Follow all local safety regulations when installing the
equipment.
• Reduce signal loss in feeder cable by minimizing the
length and number of RF connections.
• Only qualified personnel are authorized to install and
maintain the repeater.
•	Ensure the equipment is operated within the stated
environment (refer to Appendix A: Specifications or
unit datasheet).
• Ground specified equipment with the provided
grounding bolt.
• Do not use the grounding bolt to connect external devices.
• Follow electrostatic discharge (ESD) precautions.
• Where appropriate, confirm availability of suitably
terminated grade of RF and optical fiber.
• Observe handling of all cables to prevent damage.
• Use low-loss cables to connect the antennas.
User Manual | CMA-438-AEN | Page 15 of 44
3.3.1 Rack Safety Instructions
The following guidelines are relevant to the rack installed
units. Review the following guidelines to help ensure your
safety and protect the equipment from damage during the
installation.
• Only trained and qualified personnel should be allowed
to install or replace this equipment.
•	The equipment has been designed to operate at the
temperature range as stated in the product specifications.
Verify that ambient temperature of the environment does
not exceed the maximum MRU operating temperature of
65°C (149°F).
•	
IMPORTANT! If installed in a closed or multi-unit
rack assembly, the operating ambient temperature of the
rack environment may be greater than the room ambient.
Therefore, ensure that the installation environment
complies with the maximum MRU operating temperature.
•	Ensure that adequate airflow and ventilation within
the rack and around the installed components so that
the safety of the equipment is not compromised. It is
recommended to allow for at least about 1 in of airspace
between devices in the rack.
• Verify that the equipment is grounded as required –
especially in installations using supply connections other
than direct connections to the branch circuit (e.g. use of
power strips).
3.3.2 Rack Installation Guidelines
• To maintain a low center of gravity, ensure that heavier
equipment is installed near the bottom of the rack and
load the rack from the bottom to the top.
• Verify that the rack height can support the unit to be
installed (MRU rack height = 6U), where you may also
want to consider future installations.
3.4 Power Requirements
3.4.1 Power Safety Instructions
SAFETY WARNINGS! When installing or selecting
the power supplies:
• For AC models – only use the provided AC power cable
(straight, U.S. 10 A, UL, L = 1.8-2.5 m, black,110 V)
to connect the power supply to the MRU.
• Be sure to disconnect all power sources before servicing.
• Calculate the required power according to the
requirements of the specific installation and then
determine the configuration of the power supplies. The
required DC cables will then be determined by the
selected power supply configuration.
• Use only UL-approved power supplies.
• Install external overcurrent protective devices for the
system according to the power specifications described
in Section 1.2.3.
3.4.2 Types of Power Supplies
Corning supplies various power supplies that can be
installed in a rack or mounted on a wall, depending on your
configuration.
3.4.3 Circuit Breakers
Calculate the required fuse protection while referring
to power specifications described in Appendix A:
Specifications. When installing fuse protections for the
system, make sure to take into account other Corning
system elements that may require external fuse protection
as well.
3.4.4 Cable Routing
Ensure all cables, e.g. power cable, feeder cable, optical
fiber, commissioning cable, connecting are properly routed
and secured to avoid damage.
User Manual | CMA-438-AEN | Page 16 of 44
3.5 RF Coaxial Cable Guidelines
3.5.1 General RF Cable Installation
Procedures
Note: The installer should be familiar with the ANSI/TIA/
EIS-568 Cabling Standard guidelines.
•	Observe the general cable installation procedures that
meet with the building codes in your area. The building
code requires that all cabling be installed above ceiling
level (where applicable). The length of cable from the
risers to each antenna must be concealed above the
ceiling.
•	The cable must be properly supported and maintained
straight using Velcro® cable ties, cable trays, and clamps
or hangers every 10 ft (where practical above ceiling
level). Where this is not practical, the following should
be observed:
• The minimum bending radius of the supplied
1/2-in coax cable should be 7 in.
• Cable that is kinked or has a bending radius
smaller than 7 in must be replaced.
• Cable runs that span less than two floors should
be secured to suitably located mechanical
structures.
• The cables should be supported only from the
building structure.
• All cables shall be weather-resistant type.
• Cable length is determined by the system installation
plan. When calculating the cable length, take into account
excess cable slack so as not to limit the insertion paths.
3.5.2 RF Rules
•	Use coax RG-223, 50 Ohm, male-to-male QMA to
N-type for RF connections from the RIMs to the BTS and
4.3-10 type for MRU.
• When using the Corning remote unit in an environment
in which other indoor coverage systems are installed, it is
recommended (where possible) that the antennas are
placed at least 2 m apart.
• When bending coax cables, verify that the bending radius
does not exceed the coax specifications.
• Terminate all unused MRU RF ports with a 50 Ohm load.
• Make sure that the VSWR measured at the coax cable
meets the product specification. The VSWR must be
measured before terminating the MRU RF ports in the
remote communication rooms.
3.5.3 Coax Cable Lengths and Losses
Use coax RG-223, 50 Ohm, for RF connections between
MRU and DAS antennas.
Note: The required distance between the antennas (installed
in the ceiling) depends on the infrastructure and calculated
path loss. For example, if there is free space-loss between
the antennas, a minimum distance of 100 ft is required; if
there are partitions (loss) between the antennas, a distance
of less than 100 ft between them is allowed.
•	Observe the general cable installation procedures that
meet with the building codes in your area. The building
code requires that all cabling be installed above ceiling
level (where applicable). The length of cable from the
risers to each antenna must be concealed above the
ceiling.
Coax
Length
Coax Loss
(900 MHz)
Connector
Loss
Total Loss
30
0.7
1.5
2.2
40
0.9
1.5
2.4
50
1.1
1.5
2.6
60
1.3
1.5
2.8
70
1.5
1.5
80
1.7
1.5
3.2
90
1.9
1.5
3.4
100
2.1
1.5
3.6
110
2.3
1.5
3.8
120
2.5
1.5
130
2.7
1.5
4.2
140
2.9
1.5
4.4
150
3.1
1.5
4.6
160
3.3
1.5
4.8
170
3.5
1.5
180
3.7
1.5
5.2
190
3.9
1.5
5.4
200
4.1
1.5
5.6
Table 3‑1. Description of Coax Length and Losses
• Use wideband antennas supporting a range of 300 MHz
to 3 GHz.
User Manual | CMA-438-AEN | Page 17 of 44
3.6 Antenna Specifications and
Guidelines
Determine the antenna installation configuration according
to the transmission and coverage requirements and the
installation site conditions.
3.7 Fiber Optic Requirements
3.7.1 Authorized Optical Cables
The following specified optical cables are authorized for
use with the MRU product:
• Composite plenum tether assemblies
3.6.1 Authorized Antennas and Required
Specifications
• Fiber: LC APC, 2-24 fibers
•	External antennas – no limitation on any vendor of
available external antennas with respect to the following
requirements:
• Armored, non-armored
•	Omnidirectional or directional, Supported frequency
range: wideband antennas supporting a range of 700 to
2600 MHz, Gain: up to 12.5 dBi, Impedance: 50 Ohm.
•	Couplers – use N-male to N-female broadband coupler
separately ordered from Corning (P/N AK-1COUPLERNM-NF) or the equivalent:
•	Broadband frequency: 300-3000 MHz, -20 dB coupling
(SMA coupling port), Maximum VSWR/return loss:12
dB, Maximum insertion loss: 0.2 dB
• Number of antennas that can be connected (with cables/
splitters) – it is not recommended to connect more than
one antenna per connector since 1:1 connectivity is
reduced with each split.
• Types of couplers/splitters – depends on number of splits
(not recommended).
3.6.2 General Installation Guidelines
• The MRU should be installed at a convenient location,
free of metallic obstruction (can also be installed in
plenum spaces).
• Install the MRU at the designated height and tune it
roughly toward the service coverage area.
• Installation of this antenna must provide a minimum
separation distance of 100 cm from any personnel within
the area.
• Cable and jumper loss is at least 2 dB.
• cu: 16, 14, 12 AWG; 2-12 conductors
3.7.2 Fiber Optic Rules
• Use only LC APC connectors.
• UniCam® connectors can be used for field termination.
• Use only fusion splice for connecting two fibers.
• Use minimum splicing/connectors to achieve minimum
losses on the fibers (< 0.5 dB).
• Use precaution while installing, bending, or connecting
fiber optic cables:
• Fiber optic cable is sensitive to excessive pulling,
bending, and crushing forces. Consult the
cable specification sheet for the cable you are
installing.
• Do not bend cable more sharply than the
minimum recommended bend radius.
• Do not apply more pulling force to the cable than
specified.
• Do not crush the cable or allow it to kink.
Doing so may cause damage that can alter the
transmission characteristics of the cable. The
cable may have to be replaced.
•	Use an optical power meter and light source for checking
the fiber optic cables.
• Make sure the environment is clean while connecting/
splicing fiber optic cables.
• All fiber optic connectors should be cleaned prior to
connecting to the system.
User Manual | CMA-438-AEN | Page 18 of 44
• Fiber connector protective caps should be installed on
all non-terminated fibers and removed just before they
are terminated.
• Pay special attention while connecting the LC APC
connectors – ensure that you hear a “click,” indicating a
secure connection.
• Never look directly into the end of a fiber that may be
carrying laser light. Laser light can be invisible and can
damage your eyes.
3.8 Grounding Requirement
Verify that the equipment has been well grounded (refer to
the grounding lug on the bottom front panel of the MRU
chassis). This requirement includes antennas and all cables
connected to the system. Ensure lightning protection for the
antennas is properly grounded. See Section 4.3 for MRU
grounding connection.
3.9 Manual Handling
During transportation and installation, take necessary
handling precautions to avoid potential physical injury to
the installation personnel and the equipment.
User Manual | CMA-438-AEN | Page 19 of 44
CHAPTER
Installation
This document describes the installation procedure for
the Corning optical network evolution (ONE™) solutions
mid-power remote unit (MRU). Please refer to Chapter
3 – Installation Guidelines for specific guidelines on
infrastructure planning, design, and installation or consult
with a Corning product line manager or Corning-approved
installer.
4.1 Unpacking and Inspection
Unpack and inspect the cartons as follows:
1. Open the shipping cartons and carefully unpack each unit
from the protective packing material.
2. Verify that all the items listed in Table 4-1 are included
in the MRU package. If any of the listed items are
missing, contact your Corning representative.
3. Check for signs of external damage. If there is any
damage, call your Corning representative.
Kit
Item Description
Quantity Image
MRU
Mid-Power Remote Unit
Note: See “Appendix B: Ordering
Information” for MRU part numbers.
Hosted
Modules
(preinstalled)*
Service-Specific Power
Amplifier Modules (PAM) –
pre-installed according to
ordered configuration
1-5
Fan Module (FAM)
AC or DC (model dependent) 1
Power Supply Module (PSM)
AC Power
Cable (AC
models
only)
Power Cable, straight, U.S.,
10 A, UL, L = 1.8-2.5 m, black,
110 V
Rack Ears for 19-in rack (factory assembled 2
onto sides of MRU)
Table 4-1. MRU Kits
* ATTENTION! In the event that a PAM or the OPTM needs to be removed from the chassis, make sure to first press the
release button on the module and then pull out using the handle. Any attempt to pull out the module without first releasing
may cause damage. Refer to Section 5.1 for more details. Corning will not be liable for damage of products resulting from
improper handling during installation or repair.
User Manual | CMA-438-AEN | Page 20 of 44
4.2 Mounting the MRU
To install MRU in rack
The MRU supports two types of mounting installations:
1. Determine the location of the MRU in the rack while
considering additional units (e.g. power supply).
• 19-in rack installation (Section 4.2.1)
• Wall-mount installation (Section 4.2.2)
• Outdoor installation – the MRU can be installed in a
separately ordered outdoor enclosure; Refer to Section
4.2.3 for instructions on how to install the MRU in a
Purcell Systems cabinet (FlexSure® 12-2420).
4.2.1 Rack Installation
Note the following:
• MRU chassis requires 6U rack height availability.
2. Referring to Figure 4-1, secure the units’ rack ears to the
rack frame as follows:
•	Insert two screws halfway into the rack frame (one
on each side).
•	Position the bottom half slots of the chassis rack
ears on to the screws.
•	Secure the unit in the rack via the three remaining
applicable bracket holes using the appropriate rack
nuts and screws.
• Rack nuts and screws not provided.
Example of MRU Chassis Rack Installation | Figure 4-1
User Manual | CMA-438-AEN | Page 21 of 44
4.2.2 Wall-Mount Installation
Note the following:
• MRU wall-mount brackets are not included with
the MRU package and are ordered separately (P/N:
BR-MRU-W).
• The mounting surface shall be capable of supporting the
weight of the equipment. The weight of a fully populated
MRU chassis is 70.55 lbs (32 kg).
• The installer is responsible for accommodating the
installation to the surface type.
4.2.2.1 Unpacking and Inspection
Unpack and inspect the carton as follows:
1. Open the shipping carton and carefully unpack each unit
from the protective packing material.
2. Verify that all the items listed in Table 4-2 are included
in the wall-mount bracket package. If any of the listed
items are missing, contact your Corning representative.
3. Check for signs of external damage. If there is any
damage, call your Corning representative.
Item
Quantity
Wall-Mount Bracket
Screws, flat head, 8-32 x 3/8
11
Image
Table 4-2. MRU Wall-Mount Bracket Package Items
User Manual | CMA-438-AEN | Page 22 of 44
4.2.2.2 Mounting MRU on Wall
1. Assemble wall-mount bracket to MRU underside.
Assembling Bracket onto MRU | Figure 4-2
2. Select location and mark and drill appropriate holes in wall.
IMPORTANT! MRU is installed belly-to-the-wall
with door opening rightward. If installed near a right facing
wall, make sure that there is at least 16 in of clearance to
open the door to the right and to successfully remove and
replace all modules.
Wall-Mount Bracket Dimensions | Figure 4-3
User Manual | CMA-438-AEN | Page 23 of 44
2. Insert anchors in wall, hang unit, and tighten to secure.
Mounting MRU on Wall | Figure 4-4
User Manual | CMA-438-AEN | Page 24 of 44
4.3 Grounding MRU Chassis
The grounding connection is performed via a two-hole,
standard barrel grounding lug located on the front of the
MRU chassis (see Figure 4-5).
Required tools and components
The following additional (not supplied) tools and
components are required for connecting the system ground:
•	Wire-stripping tool to remove the insulation from the
grounding wire.
Connecting system ground
1.	Use a wire-stripping tool to remove approximately 0.4 in
(10.9 mm) of the covering from the end of the grounding
wire.
2.	Insert the stripped end of the grounding wire into the
open end of the grounding lug.
•	Grounding wire – The grounding wire should be sized
according to local and national installation requirements.
The provided grounding lug supports 14 to 10 AWG
stranded copper (or 12 to 10 AWG solid) wire
conductors.
3.	Crimp the grounding wire in the barrel of the grounding
lug. Verify that the ground wire is securely attached to
the ground lug by holding the ground lug and gently
pulling on the ground wire.
Note: The length of the grounding wire depends on the
proximity of the switch to proper grounding facilities.
4.	Prepare the other end of the grounding wire and connect
it to an appropriate grounding point at the site to ensure
adequate earth ground.
• Phillips screwdriver.
•	Crimping tool to crimp the grounding wire to the
grounding lug.
MRU Grounding Lug Connection | Figure 4-5
User Manual | CMA-438-AEN | Page 25 of 44
4.4 Fiber Connections
To connect optical fiber
1. Remove the LC APC connector plugs.
2. Using Corning® SMF-28® fiber (or compatible), connect
the MRU LC APC fiber connector to the fiber patch panel.
See Figure 4‑6.
Fiber Connections Toward Fiber Patch Panel | Figure 4-6
User Manual | CMA-438-AEN | Page 26 of 44
4.5 RF Antenna Connections
Connect the MRU male DIN type 4.3-10 duplexed RF
“ANTENNA” port to the broadband antenna(s) using
appropriate coax cables. See Figure 4-7.
The MRU includes one 4.3-10 type RF port used for
connecting to a 2.5 GHz external RF source (e.g. picocell).
Example of MRU Connections to Broadband Antennas (via splitter) | Figure 4-7
User Manual | CMA-438-AEN | Page 27 of 44
4.6 Power Connections
The MRU power connections depend on the type of power
module (AC or DC). The PSM is located on the bottom
right of the chassis front.
• Refer to Section 4.6.1 for AC model power connections
• Refer to Section 4.6.2 for DC model power connections
4.6.1 AC Models
Using the provided AC power cable only, simply connect
the MRU AC power connector to the AC power source.
Note the following:
• Power input: 100-240 VAC/50-60 Hz
• Power consumption: 360 W (maximum)
• Maximum AC current consumption: 5 A
4.6.2 DC Models
DC models include two types of terminal block
connectors:
• CLASS2 (default) – two 8-pin terminal block connectors
for remote feed (see Section 4.6.2.1).
• CLASS1 – one 2-pin terminal block for local plant feed.
To use CLASS1, user must change default connector
mode from CLASS2 to CLASS1 (see Section 4.6.2.2).
4.6.2.1 CLASS2 Connector (remote feed)
The CLASS2 DC connector supports one pair for each
installed PAM (up to five pairs), one pair for OPTM and
FAM, and one reserved pair (RSV) for future use. Refer to
Figure 4-9.
DC CLASS2 connector specs:
• Supported wire AWG:
			 • Conductor cross-section, solid (AWG/mm²):
				 30-12/0.2-2.5
			 • Conductor cross-section, flexible (AWG/mm²):
				 30-12/0.2-2.5
• Wire strip length: 9-10 mm
• DC power input:
			 • DC class 1: 48 VDC (40-60 VDC) 9 A maximum
			 • DC class 2: 24/48 VDC (20-60 VDC) 1.75 A
				 maximum per pair
MRU AC Model Power Connector | Figure 4-8
			 • Power amplifier consumption per pair: 50 W
• Maximum power consumption: 330 W
• Maximum current consumption: 1.75 A per pair
To perform CLASS2 DC connector wiring – for each
DC pair:
1.	Identify the positive and negative terminals for the
DC pair to be wired on the CLASS2 connector feed
positions. The wiring sequence is positive to positive and
negative to negative as shown in Figure 4-9.
2. Use a wire-stripping tool to remove the covering from
the end of the DC wire pairs.
User Manual | CMA-438-AEN | Page 28 of 44
3.	Open the terminal block screw above the negative feed
position and then insert the exposed black wire (negative
feed) into the terminal block.
Note: Ensure that no exposed portion of the DC wires
extends from the terminal block plug.
4.	Torque the terminal block captive screw (above
the installed wire lead), using a ratcheting torque
screwdriver. Recommended torque is 0.49 N•m.
5. Repeat the same process as in Steps 3 and 4 for
remaining positive feed (exposed red wire).
CAUTION! Secure the wires coming in from the
terminal block so that they cannot be disturbed by casual
contact. For example, use tie wraps to secure the wires to
the rack.
Example of CLASS2 DC Wiring Connections | Figure 4-9
User Manual | CMA-438-AEN | Page 29 of 44
4.6.2.2 CLASS1 Connector (local plant feed)
Note: In order to power the MRU via the CLASS1
connector (two-pole terminal plug), the DC bridge must be
moved from the default CLASS2 mode position to CLASS1.
DC CLASS1 power specs:
• Power input: 48 VDC (40-60 VDC)
• Maximum current consumption: 9 A
To perform CLASS1 DC connector wiring
1. Loosen PEM captive screws and pull out module from
chassis. See Figure 4-10.
Extracting PSM from Chassis | Figure 4-10
User Manual | CMA-438-AEN | Page 30 of 44
2. Move DC bridge from CLASS2 position to CLASS1 to
set DC input source type to “CLASS1” connector. Refer to
Figure 4-11.
4.7 Outdoor Installation
This section provides instructions on how to install the
MRU in a Purcell Systems cabinet (FlexSure 12-2420) and
perform external alarm connections between the unit and
the enclosure.
Note the following:
•	The MRU, outdoor enclosure, and required dry contact
alarms cable are each ordered separately.
•	Additional relevant documentation – Purcell Systems
FlexSure® 12-2420 installation manual provided with the
cabinet.
•	Only trained and qualified personnel should be allowed
to install, replace, or service this equipment.
•	The MRU connections are performed after the chassis is
installed in cabinet.
Setting CLASS1 Mode | Figure 4-11
3. Push PSM back in slot and close captive screws.
4.7.1 Items Required for Outdoor Installation
Refer to Table 4-3 for the items required for installing the
MRU in the outdoor enclosure.
4.	Identify the positive and negative terminals for the DC
pair to be wired on the CLASS1 connector feed positions.
The wiring sequence is positive to positive and negative
to negative.
5.	Use a wire-stripping tool to remove the covering from the
end of the DC wire pairs.
6.	Open the terminal block screw above the negative feed
position and then insert the exposed black wire (negative
feed) into the terminal block.
Note: Ensure that no exposed portion of the DC wires
extends from the terminal block plug.
7.	Torque the terminal block captive screw (above
the installed wire lead), using a ratcheting torque
screwdriver. Recommended torque is 0.49 N•m.
8.	Repeat the same process as in Steps 6 and 7 for
remaining positive feed (exposed red wire).
CAUTION! Secure the wires coming in from the
terminal block so that they cannot be disturbed by casual
contact. For example, use tie wraps to secure the wires to
the rack.
User Manual | CMA-438-AEN | Page 31 of 44
Kit
Item
Quantity
FLX12-2420 Enclosure
Purcell Systems FlexSure® 12U Outdoor GR-487 Enclosure for single MRU
installations in SISO cabinets:
Purcell Systems P/N: 2000003905 FLX12-2420, 39W/C HEX, right hinge door
Purcell Systems P/N: 2000003974 FLX12-2420, 39W/C HEX, left hinge door
MRU
Mid-Power Remote Unit
FLX12-2420 Pole-Mounting P/N 2000003986 Platform Pole-Mount Kit for FLX12-2420 SISO and
Kit (optional)
FLX16-2520 MIMO
FLX12-2420 Wall-Mounting P/N 2000003985 Wall-Mount Kit for FLX12-2420 SISO
Kit (optional)
External Alarms Cable
(AK-MRU-DCA-CBL)
DB9 Male Open Wire Cable for external alarm connections
Table 4-3. Items Required for Outdoor Installation
Additional required items (not provided):
• Standard electrician tools (including ratchet wrench with
extension bar and 8 mm socket) for tightening selfdrilling screws securing MRU chassis to cabinet rails)
• Assorted cable ties
• 90-degree right angle 4.3-10 type male connector coax
cables – one for antenna connection and one for external
2.5 GHz RF source connection (if relevant)
• Recommended – flexible cable conduits for routing
connections cables through cabinet knockouts; refer to
Figure 4-6 for relevant knockouts. Following are
recommended Heyco part numbers for flexible conduits:
Manufacturer P/N
Description
8406
HFC 1 Conduit Fitting with
8467 nut, 1-in thread, black
8453
HF2 1 Tubing, 100-ft coil,
black
8456
HFC 2 Tubing, 50-ft coil, black
8642
HFC 2 Conduit Fitting, 2-in
thread, black
Table 4-4. Recommended Conduits
• Sealing material for knockouts – if not using conduits
User Manual | CMA-438-AEN | Page 32 of 44
4.7.2 Pre-Installation Procedures
1. Remove each rack ear and reassemble according to
position shown in Figure 4-12.
Required Position of MRU Rack Ears | Figure 4-12
2. Referring to Figure 4-13 for relevant knockouts, use
appropriate knockout tools to punch out knockouts for
routing connection cables.
Required Knockout Positions | Figure 4-13
User Manual | CMA-438-AEN | Page 33 of 44
4.7.3 Install MRU in Cabinet
1. Carefully lay cabinet on backside (so door faces upward)
and open door.
ATTENTION! Make sure that the door hatch locks
into the door rail in order to avoid closing of door while
installing the chassis. See Figure 4-14.
Note: Push hatch inward toward the door to release and
close the cabinet.
Opening Cabinet Door and Locking in Place | Figure 4-14
User Manual | CMA-438-AEN | Page 34 of 44
2.	Insert one 8-mm self-tapping screw (provided with the
cabinet) halfway into the bottom hole of each rail. Refer
to Figure 4-15.
Note: An extension bar may be required to access the screws
due to narrow space between chassis and cabinet rails.
4. Insert at least two additional screws into each of the
cabinet rails to safely secure MRU and tighten.
5.	(Optional) Insert the appropriate conduits (refer to Table
4‑4 in Section 4.7.1 for recommended part numbers) in
each of the punched out knockouts.
4.7.4 MRU Connections
Note the following:
1. Ground the cabinet and MRU:
• For cabinet grounding instructions – refer to the
manufacturer’s installation guide for instructions on
cabinet grounding.
• Using one of the grounding cables provided with the
cabinet, ground the MRU chassis via the two-hole,
standard barrel grounding lug located on the front panel
to one of the cabinet grounding bolts. Refer to
Figure 4-17.
Self-Tapping Screw Inserted in Each Rail | Figure 4-15
3.	Position the bottom half slots of the MRU rack ears onto
the protruding screws and tighten the screws using a
ratchet wrench. Refer to Figure 4-16.
Grounding MRU to Cabinet | Figure 4-17
Securing MRU to Cabinet Rails | Figure 4-16
User Manual | CMA-438-AEN | Page 35 of 44
2. Connect RF antenna coax – (for both 4.3-10 type
“ANTENNA PORT” and “2.5 GHz INPUT PORT”)
route coax cable with 90-degree right angle connector
through its designated knockout (see Figure 4-13)
behind and above the MRU chassis and connect to the
corresponding RF port. Refer to Figure 4-18.
3. Route optical fiber from ICU and power cable through
designated knockouts (see Figure 4-13) and connect
according to instructions in Section 4.4. Refer to
Figure 4-18.
Note: For DC power connections – route DC power cable
with open wires (without connector) and then wire according
to instructions in Section 4.6.2.
4.7.5 External Alarm Connections
Note: Also refer to relevant section of the Purcell Systems
cabinet installation manual (i.e. “Connecting Optional
Custom Alarms”).
A DB9 female pin “External Alarms” connector (located on
optical module below RJ45 ports) provides support for up to
three external dry contact alarm connections from external
sources (incoming outputs). See Figure 4-19. The connector
provides indications for door opening, heat exchanger
(HEX) and one additional input for future use.
MRU External Alarms Connector and Cable | Figure 4-19
Example of Routed Connection Cables | Figure 4-18
User Manual | CMA-438-AEN | Page 36 of 44
To perform external alarm connections:
1. Connect the external alarms cable (ordered separately)
to the chassis’s DB9 ”External Alarms” connector.
Refer to Table 4-5 and Figure 4-20 for pinout information.
Pin
Description
Common
Not connected
Not connected
Not connected
Not connected
Door alarm
Heat exchange (HEX) alarm
Future alarm
Exist indication (indicates existing
connection of alarm cable)
2.	Route the cable alarm wires to the alarm block, located
on the upper right corner of the cabinet. See Figure 4-21.
Table 4-5. MRU External Alarm Connector Pinout Description
Location of External Alarms
Connector and Cabinet Alarms Block | Figure 4-21
MRU External Alarms Connector Pinout | Figure 4-20
3.	Connect the external alarm connections to the cabinet.
Table 4-6 provides the dry contact alarms cable wiring
description.
Color
Description
Red
+48 V_COMMON
Green
-48 V_EXIST INDICATION
Brown
-48 V_DOOR ALARM
Black
-48 V_HEX ALARM
White
-48 V_FUTURE ALARM
Table 4-6. Dry Contact Alarm Cable Wiring Info
User Manual | CMA-438-AEN | Page 37 of 44
Refer to Table 4-7 for wiring description of MRU External
Alarms connector and to Figure 4-22 for examples of the
upper and lower cabinet block wiring connections.
External Alarms Connector Pin No.
Common
Door Alarm
NC
HEX Alarm
NC
Future Alarm
NC
Exist Indication
NC (not connected)
4.8 Verifying Normal
Operation
• Verify that all the fans are operational.
• By referring to Table 2-2 in Chapter 2, verify that all the
LEDs on the top-left of the chassis door and on each
PAM are signaling normal system operation.
Table 4-7. External Alarms to Cabinet Block Wiring
Example of External Alarm Wiring Connections | Figure 4-22
4. Verify that fans are operational. Refer to status LEDs
on the inside of the cabinet door and verify that all
show green.
User Manual | CMA-438-AEN | Page 38 of 44
All of the MRU components (except backplanes) are hot
swappable and field upgradable modules (i.e. PSM, PAM,
OPTM, and FAM). Refer to Chapter 7 - Appendix B:
Ordering Information for stand-alone modules which can
be ordered for upgrade or maintenance purposes.
CHAPTER
Maintenance
5.1 Extracting/Replacing PAM
and OPTM
ATTENTION! In the event that a PAM or the OPTM
needs to be removed from the chassis for upgrade or
maintenance purposes, make sure to first press the release
button on the module and then pull out using the handle.
Any attempt to pull out the module without first releasing
may cause damage. Corning will not be liable for damage
of products resulting from improper handling during
installation or repair.
Extracting PAM/OPTM Module | Figure 5-1
User Manual | CMA-438-AEN | Page 39 of 44
CHAPTER
Appendix A: Specifications
Supported Services
Frequency Range (MHz)
Technology
Service/Band
Uplink (UL)
Downlink (DL)
LTE
700 MHz Lower ABC
700 MHz Upper C
698-716
776-787
728-746
746-757
CDMA/LTE
ESMR 800
817-824
862- 869
CDMA/GSM/LTE/UMTS
CELL 850
824-849
869-894
CDMA/LTE/GSM/UMTS
PCS + G 1900
1850-1915
1930-1995
UMTS/LTE
AWS + AWS-3
1710-1778
2110-2180
LTE
WCS
2305-2315
2350-2360
LTE
BRS/EBS
2496-2690
RF Parameters per Service
Service/Band
RF Parameter
Frequency Range
(MHz)
Maximum
Output Power
per Antenna Port
(dBm)
Input Power
(dBm)
LTE
700 MHz
DL
UL
UL
AWS
1700 MHz
AWS1/3***
1700 MHz
PCS
1900 MHz
WCS
2300 MHz
DL
UL
DL
UL
DL
UL
DL
UL
21102155
17101755
21102180
17101780
19301995
18501915
23502360
23052315
30
30
33
34
33
33
0-37
0-37
0-37
0-37
0-37
0-37
-19 to
15
-19 to 15
-19 to
15
-19 to
15
-19 to
15
-19 to
15
60
64
60
60
64
60
SFDR* (dB)
≤ -13
≤ -13
UL NF* (dB)
Gain Flatness/
Ripple (dB)
DL
728-746 698-716 862-869/ 817-824/
746-756 777-787 869-894 824-849
UL Gain Range
(dB)
Maximum
Intermod
Distortion (dBm)
ESMR 800/
CELL 850 MHz
≤ -13
12
± 2.0
12
± 2.0
≤ -13
12
± 2.0
≤ -13
12
± 2.0
≤ -13
12
± 2.0
12
± 2.0
*SFDR calculated with bandwidth of 1.23 MHz for the CELL and PCS and with 5 MHz for the LTE, AWS, and WCS.
**Typical for single remote unit
***AWS1/3 supported only with MRU-PAM-A17E
User Manual | CMA-438-AEN | Page 40 of 44
Coupling Specifications
DL Center Frequency of
Supported Bands (MHz)
Typical Coupling* (dB)
742.5
26.0
878.0
26.0
1962.5
26.0
2145.0
26.0
2355.0
26.0
*The typical coupling value for the supported bands is -26 dB; however, a delta of +/- 3 dB can be expected. As such, the actual coupling value for
each unit (measured for the DL center frequency of supported bands) is specified on a label on the unit. Note that the test port is bi-directional, so
that a UL signal can also be injected and measured with a -26 dB loss.
Environmental Specifications
Operating Temperature
-40° to +65°C (-40° to 149°F)
Storage Temperature
-30° to 85°C (-22° to 185°F)
Standards and Approvals
Laser Safety
FDA/CE 21 CFR 1040.10 and 1040.11 except for deviations pursuant to Laser
Notice No. 50 and IEC 60825-1
EMC/Radio
FCC 47 CFR Part 15, 22, 24, 27
Safety
UL 60950
IEC 60825-1:2007
IEC 60825-2:2010
CAN/CSA-C22.2 No. 60950-1-03
NEBS
GR-63, GR-1089, GR-487 (with outdoor enclosure)
Optical Specifications
Optical Output Power
< 9 dBm
Maximum Optical Budget
7 dB (5 dB over any temperature and optical variations)
Back Reflectance
-60 dB
Optical Connector
LC APC single-mode
Fiber Type
Corning® SMF-28® fiber or compatible
Wavelength
1310 ± 10 nm (at 25°C)
User Manual | CMA-438-AEN | Page 41 of 44
Physical Specifications
MRU Hosting Capabilities
• Five service-specific power amplifier modules (PAMs)
• One optical module (OPTM)
• One fan module (FAM)
• One AC or DC (model dependent) power supply module (PSM)
Interfaces
• One 4.3-10 type duplexed RF antenna port
• One LC APC port for fiber optic connection
• One QMA coupling “Test Port” (used for UL and DL measurements during
system operation)
• One 4.3-10 type RF port for 2.5 GHz external RF source
• One RJ45 MGMT (local) connection
• One two-hole, standard barrel grounding lug; for use with stranded copper
wire conductors; 10-14 AWG; holes – 1/4 in
• “DC In” connectors (model dependent):
• One “DC In” 2-pin “Class 1” terminal block
•T
 wo “DC In” 8-pin “Class 2” terminal block connectors: one pair for each
PAM (total of five pairs) and one pair for the FAM and OPTM; one RSV pair
• One QMA input connector for EXP UL
• One QMA output connector for EXP DL
• One DB9 female external alarm connector for external dry contact
alarm connections
Power
• Power Consumption: DC version: 330 W (maximum)
AC version: 360 W (maximum)
• AC Power Input: 100-240 VAC/50-60 Hz
• Maximum AC Current Consumption: 5 A
• DC Power Input:
• DC class 1: 48 VDC (40-60 VDC) 9 A maximum
• DC class 2: 24/48 VDC (20-60 VDC)
• Power amplifier consumption per pair: 50 W
• Maximum power consumption: 330 W
• Maximum current consumption: 1.75 A per pair
• Maximum current draw per pair: 64 W
Management
Managed via the headend control module (HCM v1.6)
Physical Characteristics
Mounting: 			
19-in rack (6U rack height),
Wall mount (separately ordered accessory kit)
Dimensions (H x W x D):
10.5 x 17.5 x 15.75 in* (266.7 x 445 x 400 mm)
*without brackets
Weight:			
Chassis without PAMs: 48 lbs (21.8 kg)
Each PAM: 4.7 lbs (2.15 kg)
User Manual | CMA-438-AEN | Page 42 of 44
CHAPTER
Appendix B: Ordering Information
MRU Assembly Configurations*
Part Number
Description
MRU-ASM-DC
MRU-DC Assembly with OPTIM, FAM, and DC PSM (PAMs required)
MRU-78171923-DC
MRU-DC Assembly with five PAM modules supporting LTE700, ESMR, CELL, AWS, PCS, and WCS
MRU-781719-DC
MRU-DC Assembly with four PAM modules supporting LTE700, ESMR, CELL, AWS, and PCS
MRU-7819-DC
MRU-DC Assembly with three PAM modules supporting LTE700, ESMR, CELL, and PCS
MRU-81719-DC
MRU-DC Assembly with three PAM modules supporting ESMR, CELL, AWS, and PCS
MRU-71719-DC
MRU-DC Assembly with three PAM modules supporting LTE700, AWS, and PCS
MRU-ASM-AC
MRU-AC Assembly with OPTIM, FAM, and AC PSM (PAMs required)
MRU-78171923-AC
MRU-AC Assembly with five PAM modules supporting LTE700, ESMR, CELL, AWS, PCS, and WCS
MRU-781719-AC
MRU-AC Assembly with four PAM modules supporting LTE700, ESMR, CELL, AWS, and PCS
MRU-7819-AC
MRU-AC Assembly with three PAM modules supporting LTE700, ESMR, CELL, and PCS
MRU-81719-AC
MRU-AC Assembly with three PAM modules supporting ESMR, CELL, AWS, and PCS
MRU-71719-AC
MRU-AC Assembly with three PAM modules supporting LTE700, AWS, and PCS
Table 7-1. Part Numbers for MRU Assemblies Configurations
*Refer to Table 7-2 for part numbers for MRU assemblies which have been upgraded for future AWS1/3 support.
MRU Assembly Configurations Upgraded for Future
AWS1/3 Support
Part Number
Description
MRU-E-78171923-DC
MRU-DC-AWSe Supported Assembly with five PAM modules supporting: LTE700, ESMR, CELL,
PCS, AWS1, and WCS
MRU-E-781719-DC
MRU-DC-AWSe Supported Assembly with four PAM modules supporting: LTE700, ESMR, CELL,
PCS, and AWS1
MRU-E-81719-DC
MRU-DC-AWSe Supported Assembly with three PAM modules supporting: ESMR, CELL, AWS1,
and PCS
MRU-E-71719-DC
MRU-DC-AWSe Supported Assembly with three PAM modules supporting: LTE700, AWS1,
and PCS
MRU-E-78171923-AC
MRU-AC-AWSe Supported Assembly with five PAM modules supporting: LTE700, ESMR,
CELL,PCS, AWS1 and WCS
MRU-E-781719-AC
MRU-AC-AWSe Supported Assembly with four PAM modules supporting: LTE700, ESMR, CELL,
PCS, and AWS1
MRU-E-81719-AC
MRU-AC-AWSe Supported Assembly with three PAM modules supporting: ESMR, CELL, AWS1,
and PCS
MRU-E-71719-AC
MRU-AC-AWSe Supported Assembly with three PAM modules supporting: LTE700, AWS1,
and PCS
MRU-E-ASM-AC-B
MRU-AC-AWSe Supported Assembly with OPTIM, FAM, and AC PSM modules
MRU-E-ASM-DC-B
MRU-DC-AWSe Supported Assembly with OPTIM, FAM, and DC PSM modules
Table 7-2. Part Numbers for MRU Assembly Configurations Upgraded for Future AWS1/3 Support
User Manual | CMA-438-AEN | Page 43 of 44
MRU Stand-Alone Modules
Note: Stand-alone modules can be ordered for upgrade or maintenance purposes.
Part Number
Description
MRU-OPTM-P
Mid-Power Remote Unit Optical Module Support IF and listening mode,
MRU-PAM-17
Mid-Power Remote Unit Power Amplifier Module supporting AWS 1700 MHz
MRU-PAM-8
Mid-Power Remote Unit Amplifier Module supporting ESMR800 and CELL 850
MRU-PAM-7
Mid-Power Remote Unit Power Amplifier Module supporting LTE 700 MHz
MRU-PAM-19
Mid-Power Remote Unit Power Amplifier Module supporting PCS 1900 MHz
MRU-PAM-23
Mid-Power Remote Unit Power Amplifier Module supporting PCS 2300 MHz
MRU-PSM-AC
Mid-Power Remote Unit AC Power Supply Module
MRU-PSM-DC
Mid-Power Remote Unit DC Power Supply Module
MRU-FAM
Mid-Power Remote Unit Modular Fan Module
Table 7-3. Part Numbers for MRU Stand-alone Modules
Accessories
Part Number
Description
BR-MRU-W
Mid-Power Remote Unit Wall Mounting Bracket (vertical installation)
AK-MRU-DCA-CBL
Mid-Power Remote Unit Dry Contact Cable Assembly (optional)
Table 7-4. Part Numbers for MRU Accessories
User Manual | CMA-438-AEN | Page 44 of 44
Cable Assemblies
|1
|2
|3
|4
|5
|6
|7
|8
|9
F-
|10 |11
|1
|4
|7
Select end one connector.
Select cu conductor count.
Select cable type.
00 = None
18 = LC APC duplex
66 = SC APC duplex
0 = No conductors
2 = 2 conductors
4 = 4 conductors
6 = 6 conductors
U = Fiber and copper conductors
G = Fiber only
|2
|5
Select end two connector.
Select cu connectors.
08 = LC APC duplex
66 = SC APC duplex
C = With connectors
N = No connectors
|3
Select cu wire gauge.
F = 12 AWG
G = 14 AWG
H = 16 AWG
|6
Select fiber count.
04 = 4 fibers
06 = 6 fibers
24 = 24 fibers (see Note 1)
48 = 48 fibers (see Note 1)
72 = 72 fibers (see Note 1)
96 = 96 fibers (see Note 1)
E4 = 144 fibers
Note 1: Fiber-only trunk cables (no conductive pairs); MTP ® connector is
			 standard – for other options, please contact Customer Care.
Note 2: Cable lengths:
			 • Preconnectorized cable can only be ordered in 10-ft increments.
			 • Non-connectorized bulk cabling can only be ordered in 50-ft increments.
|8
Select armored or non-armored.
20 = Non-armored
A3 = Armored indoor plenum
|9
Select cable length.
010-999 ft (see Note 2)
|10
Select pulling grip.
P = One-sided pulling grip
N = No pulling grip
|11
Select kit.
K = Two strain-relief
trunk holders (see Note 3)
N = None
Note 3: Available for 24-144 fiber cables only.
Corning Optical Communications Wireless, Inc. • 13221 Woodland Park Road, Suite 400 • Herndon, Virginia 20171 USA
866-436-9266 • FAX: 703-848-0280 • Tech Support Hotline: 410-553-2086 or 800-787-1266 • www.corning.com/opcomm
Corning Optical Communications Wireless reserves the right to improve, enhance, and modify the features and specifications of Corning Optical Communications Wireless products without
prior notification. A complete listing of the trademarks of Corning Optical Communications Wireless is available at www.corning.com/opcomm/trademarks. All other trademarks are the properties
of their respective owners. Corning Optical Communications Wireless is ISO 9001 certified. © 2016 Corning Optical Communications. All rights reserved. CMA-438-AEN / April 2016
P/N 709C017501

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