operational manual
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
1
S-0110P-A
CAP RATE-ADAPTIVE
ETHERNET DSL
REMOTE UNIT (ATU-R)
A90-36R210
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
2
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
i
CONTENTS
CAP RATE-ADAPTIVE ETHERNET DSL REMOTE UNIT WITH FLASH (ATU-R)...................................................... 1
1. GENERAL DESCRIPTION........................................................................................................................ 1
2. DOCUMENT CONTROL .......................................................................................................................... 1
3. BUILD CONTROL................................................................................................................................... 1
4. COMPATIBILITY ..................................................................................................................................... 2
5. INSPECTION.......................................................................................................................................... 2
6. PRODUCT OVERVIEW............................................................................................................................ 2
6.1 Features and Functions ................................................................................................................. 2
6.2 Transmission................................................................................................................................. 3
6.3 Configuration................................................................................................................................. 4
6.4 ATU-R Indicators........................................................................................................................... 6
6.5 Interfaces and Connectors ............................................................................................................ 7
6.6 Signals........................................................................................................................................... 9
6.7 10BaseT Ethernet DSL Diagnostics.............................................................................................. 9
6.8 System Status and Performance Management........................................................................... 10
7. BLOCK DIAGRAM................................................................................................................................. 10
8. OPERATION ........................................................................................................................................ 11
9. INSTALLATION..................................................................................................................................... 11
9.1 Unpacking.................................................................................................................................... 11
9.2 Installation Criteria....................................................................................................................... 12
9.3 ATU-R Wiring.............................................................................................................................. 12
9.3.1 Installation with an Internal POTS Splitter........................................................................... 13
9.3.2 Installation without an Internal POTS Splitter ..................................................................... 14
10. MAINTENANCE .................................................................................................................................. 15
10.1 Troubleshooting and Repair ...................................................................................................... 15
10.2 Visual Inspection........................................................................................................................ 15
11. SPECIFICATIONS ............................................................................................................................... 16
INDEX........................................................................................................................................................................................ 17
FCC NOTICE:........................................................................................................................................ 18
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
ii
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
1
CAP RATE-ADAPTIVE ETHERNET DSL
REMOTE UNIT WITH FLASH
(ATU-R)
1. General Description
The Ethernet DSL remote unit (ATU-R) (A90-36R210W00) terminates a DSL line at the
subscriber location. The 10BaseT Ethernet DSL system uses Carrierless Amplitude Phase
Modulation (CAP) transmission to provide reliable DSL transport over the existing copper
cable infrastructure. The ATU-R separates CAP high-speed downstream and lower-speed
upstream channel data and POTS (Plain Old Telephone Service) signals which have been
transported via twisted-pair copper wires between an access line module at the central office
and the subscriber premises. The ATU-R provides an industry standard 10BaseT interface
to the customer’s CPE equipment. Application software is fully downloadable to allow for
future enhancements. The ATU-R is available with or without an optional internal POTS
splitter.
ATU-R Options CLEI FCC ID Number
A90-36R210 Without Internal POTS Splitter VARTFMD1AA CH8AR210
2. Document Control
Whenever this section of the manual is revised, the reason will be stated in this subsection.
Each time a revision is made, the revision level (located in the upper right corner) will be
increased by one letter. In addition, any changes in fit, form or function of the equipment
will cause the issue letter (located in the upper right corner) to be increased. An explanation
of the equipment changes will also be made in this subsection. See the Overview section of
this manual for additional information.
3. Build Control
The remote unit (ATU-R) is identified by an issue letter and model number imprinted on the
bottom of the unit. Each time a change is made to the product which changes the form, fit
or function of the product, the issue letter is advanced. Be sure to indicate the unit’s issue
letter and model number when making inquiries about the product. The release number in
the bottom left corner indicates the release(s) for which the module or section is valid.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
2
A90-36R210-xxx
Issue Number Model Number Last three digits indicate
POTS Splitter options.
A90-36CP21R xxx
W00
NA1
No internal POTS splitter
North American POTS Splitter
S-0146-A
4. Compatibility
Refer to the System Overview (030-100983) section, Paragraph 5, for a complete list of all
system element compatibility.
5. Inspection
Upon receipt, thoroughly inspect the remote unit for damage. If the remote unit has been
damaged during transit, please report the damage immediately to the transportation
company and to your Westell representative. Responsibility for safe delivery of goods is
assured by the transportation carrier. Refer to the SuperVision Service/Technical Support
Section of this manual for further information.
6. Product Overview
The remote unit is located at the subscriber’s premises and terminates the digital subscriber
line originating from the (ATU-C) in the central office.
The software within the ATU-R completely controls the hardware by providing an embedded
system that implements a multiport learning MAC layer bridge that interfaces between
Logical Link Control/Subnetwork Access Protocol (LLC/SNAP) AAL5 encapsulated ATM cell-
based, bridged protocol data units (PDUs) and 10BaseT Ethernet frames. The AAL5 layer is
the layer that supports connection-oriented, variable-bit-rate data services such as the
typical "bursty" data traffic found in today's LANs. The LLC sublayer handles error control,
flow control, framing, and MAC-sublayer addressing.
6.1 Features and Functions
The ATU-R provides a flexible platform for providing DSL services and applications. These
features include:
• No in-home configuration required. Once the ADSL line is provisioned by the telco,
the ATU-R is plug-and-play.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
3
• Utilizes RADSL technology which supports rates from 640 kbps to 7.1 Mbps
downstream and 91 kbps to 1.088 Mbps upstream.
• Available options include internal POTS splitters customized to country-specific POTS
specifications or no internal POTS splitters where an external splitter is preferred.
• Support for fully automatic rate adaptation upon power-up, as well as support for
fixed rate operation.
• Translation between Ethernet MAC frames and LLC/SNAP AAL5 encapsulated ATM
bridged PDUs. In the ATM environment, this means that a PDU is sent through each
relevant virtual circuit (VC).
• 10BaseT Ethernet interface on customer side with high-speed ADSL-based network
side.
• Support for up to eight simultaneous connections via ATM PVCs.
• Status indicators via front panel LEDs.
• Multiport MAC layer learning bridge implemented in software. The bridge associates
a destination MAC address with an ATM PVC.
• Support for statically provisioned MAC addresses.
• Programmable handling of Ethernet broadcast and multicast frames.
• Programmable ATM QoS parameters for upstream traffic (towards network).
• Offers centralized, software-controlled configuration, diagnostics and performance
monitoring.
• System software is fully upgradadable via a standard web browser.
6.2 Transmission
The system uses Carrierless Amplitude Phase Modulation (CAP) technology to deliver from
640 kbps to 7.1 Mbps downstream and 91 kbps to 1.088 Mbps upstream for data, while
simultaneously providing lifeline POTS (Plain Old Telephone Service). Upstream is defined
as from CPE to network and downstream from network to CPE.
The following table defines the DSL speed values at which the unit is capable of operating.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
4
DSL Rate
Upstream DSL Rate
Downstream
91 kbps* 640 kbps
272 kbps* 960 kbps
408 kbps 1.28 Mbps
544 kbps* 1.6 Mbps
680 kbps 1.92 Mbps
816 kbps* 2.24 Mbps
952 kbps 2.56 Mbps
1088 kbps 2.688 Mbps
3.2 Mbps
4.48 Mbps
5.12 Mbps
6.27 Mbps
7.168 Mbps
*This upstream rate is not valid when the
downstream rate is above 2.56 Mbps
6.3 Configuration
The ATU-R supports numerous programmable options which can be configured through an
element-management system. The configurable options include:
• PERMANENT VIRTUAL CIRCUIT (PVC) NUMBER – Assigns the number of the ATM
permanent virtual circuit. Defaults to zero (range 0 - 8).
• VIRTUAL PATH IDENTIFIER (VPI) NUMBER – An 8-bit field in the ATM cell header that
indicates the virtual path over which a cell is to be routed. It is the VPI address of the
PVC. Defaults to zero (range 0-255).
• VIRTUAL CHANNEL IDENTIFIER (VCI) NUMBER – The unique numerical tag used to
identify every virtual channel across an ATM network, defined by a 16-bit field in the
ATM cell header. It is used for the addressing information carried on ATM cells.
Indicates the VCI address of the PVC. Defaults to zero (range 0 - 65,535).
• PEAK CELL RATE (PCR) – A traffic management parameter that determines how often
data samples are sent. Defaults to 3600 cells per second (range 0-30,000).
• CELL DELAY VARIANCE TOLERANCE (CDVT) – A network descriptor parameter that
characterizes the delay jitter/cell clumping that can be encountered by cells in the
network and CPE devices. It is used in conjunction with PCR and SCR. Defaults to
zero (range 0 - 255). Measured in cell times.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
5
• SUSTAINABLE CELL RATE (SCR) – Determines the long-term average cell rate that can
be transmitted. Default is 3600 cells per second (range 0 - 30,000).
• MAXIMUM BURST SIZE (MBS) – Defines the maximum cell burst size at the peak cell
rate (PCR). Default is zero (range 0 - 255). Measured in cells at the PCR.
• BRIDGE MODE – Static or Learned. Default is learned.
• UPSTREAM CELL RATE (UCR) – Defines the upstream cell rate in cells per second.
Allows for control of upstream data at the ATM layer as opposed to the DSL line rate
when set to 0. Upstream cell rate equals DSL line rate. Default is 0, (range 0 -
30,000).
• BRIDGE AGING INTERVAL – Determines the length of time a MAC-to-ATM PVC binding is
stored in bridge before a refresh is needed. Default is 1800 seconds (range 0 -
65,535 seconds).
• MAC ADDRESS – A 48-bit MAC address. Up to 16 addresses can be provisioned to
use with static bridge mode operation.
• UPSTREAM TRANSMIT POWER – Upstream transmit power can be programmed from 0
dB to -12 dB in 3-dB increments from typical transmit power of -13.3 dB. This means
maximum upstream transmit power can be set in the range of -13.3 dB (0 dB ∆) to -
25.3 dB (-12 dB ∆).
PER PVC PARAMETERS
ENABLE/DISABLE FORWARDING OF ALL ETHERNET BROADCAST FRAMES – An Ethernet
Broadcast frame is a data packet that will be sent to all nodes on a network.
Broadcasts are identified by a broadcast address. Generally, the broadcast address
is a destination address of all ones. Default is Disabled (only forward IP broadcasts).
ENABLE/DISABLE FORWARDING OF ALL ETHERNET MULTICAST FRAMES – A multicast
frame is a data packet copied by the network and sent to a specific subset of network
addresses. These addresses are specified in the destination address field. Single
addresses that refers to multiple network devices. Synonymous with group address.
Default is Disabled (on multicasts forwarded).
ENABLE/DISABLE ETHERNET FRAME CHECK SEQUENCE (FCS) PRESERVATION – Frame
check sequence refers to the extra characters added to a frame for error-control
purposes. It is used in most data link-layer protocols. The Ethernet FCS consists of
four extra characters at the end of the frame. Default is Disabled (FCS not
preserved).
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
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ENABLE/DISABLE THIS PERMANENT VIRTUAL CONNECTION (PVC) FOR BROADCAST FRAMES
ONLY – Virtual circuit that is permanently established between two points. PVCs save
bandwidth associated with circuit establishment and tear down in situations where
certain virtual circuits must exist all the time. PVCs are provisioned between the ATU-
R and network switching elements. Default is Disabled (normal PVC).
6.4 ATU-R Indicators
Figure 1 shows the 10BaseT Ethernet DSL Remote Unit.
SuperVision
Power
Ready
Link
A cti v ity
Connections are
located on the
back of the
remote unit
S-0107-A
Figure 1. Ethernet DSL Remote Unit (Top)
The Ethernet remote unit has four LEDs on the front panel that allow for verification of the
operation and status of the remote unit, and transmission and recei
pt of data. The green POWER LED and two-color (red and green) READY LED, when lit, gives
an indication of the unit’s operation/status as well as the network DSL connection. The
green LINK LED, when lit, provides an indication that the 10BaseT link between the ATU-R
and the CPE is established and the yellow ACTIVITY LED, when lit, indicates whether
transmit or receive Ethernet data is present on the LAN.
The LEDs have the following states:
POWER
State Description
Steady Green Power ON
No Light No power
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
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READY
State Description
Slow Flashing Green Power ON and passed power-up diagnostics (1 flash/sec)
Moderate Flashing Green Power ON and attempting synchronization (2 flashes/sec)
Fast Flashing Green Power is ON and synchronized with the ATU-C and downloading
operational sequence (4 flashes/sec)
Steady Green Power ON and synchronized with ATU-C
Steady Green/
Intermittent Red
Power is ON and synchronized with ATU-C, but a line error
condition was detected
Steady Red Unit diagnostic failed
Blinking Red Unit failed power-up diagnostic
No Light No power
LINK
State Description
Steady Green Link established
No Light No 10BaseT link
ACTIVITY
State Description
Pulsing Yellow Traffic is being transmitted. Pulses should match the receipt or
transmit of Ethernet data
No Light No traffic
6.5 Interfaces and Connectors
On the rear panel, the ATU-R has a power ON/OFF switch, connectors for power,
POTS/DSL, a phone and customer terminal equipment port. Figure 2 shows the ATU-R’s
side panel.
Connectors
NAME TYPE USE
Power MINI-DIN connector Power
Line one 8-pin modular jack POTS/DSL
Phone 6-pin modular jack RJ11 POTS
Ethernet 8-pin RJ45 jack Ethernet (customer terminal equipment option)
Figure 2 shows the connector side of the ATU-R with the optional phone connector shown.
Figure 3 shows the side panel without POTS splitter. The phone jack is not provided on the
unit without internal POTS.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
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8
I
O
DSL CONNECTOR
10BaseT
CONNECTOR
POWER
CONNECTOR
24 VAC, 0.4 A
50-60 Hz
POWER
ON/OFF
SWITCH
PHONE CONNECTOR
(OPTIONAL) - ONLY WITH
INTERNAL POTS SPLITTER
LINE ETHERNET
S-0108-B
PHONE
Figure 2. Rear Panel of 10BaseT Ethernet DSL Remote Unit with Internal POTS Splitter
POWER
CONNECTOR
24 VAC, 0.4 A
50-60 Hz
I
O
DSL CONNECTOR
10BaseT
CONNECTOR
POWER
ON/OFF
SWITCH
LINE ETHERNET
S-0109-A
Figure 3. Rear Panel of 10BaseT Ethernet DSL Remote Unit without Internal POTS Splitter
Pinout for Alternate POTS
(Phone - RJ11)
1Not Used
2Not Used
3
Phone Tip
4
Phone Ring
5Not Used
6Not Used
A connector is provided on units with an internal POTS splitter only.
Pinout for DSL
1Not Used
2Not Used
3Not Used
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
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Pinout for DSL
4
DSL Tip
5
DSL Ring
6Not Used
7Not Used
8Not Used
DSL connector designed to operate with either an 8-pin or 6-pin standard cable.
Pinout for 10BaseT interface
1
Rx
+
2
Rx
-
3
Tx
+
4Not Used
5Not Used
6
Tx
-
7Not Used
8Not Used
6.6 Signals
ATU-C to ATU-R – POTS and DSL signals are sent from the access line module at the
central office to the ATU-R over the digital subscriber line. The POTS signal is carried in the
voice band frequency range, 0 to 4 kHz, that is specified by the telephone network voice
switch. The ADSL video and data signals are carried in the frequency range above 35 kHz
(out-of-voice band). The upstream channel occupies the frequency range between 35 kHz
and 170 kHz. The downstream channel occupies the range above 240 kHz and below 1.551
MHz.
ATU-R to Subscriber – The ATU-R receives the modulated signal from the access line
module and then separates the POTS signal from the DSL signal. The POTS signal is
routed to the subscriber’s telephone. The ATU-R demodulates the DSL signal and routes it
to the PC or other user equipment via an 10BaseT interface.
6.7 10BaseT Ethernet DSL Diagnostics
The system includes built-in diagnostics that may be invoked through the element-
management system. Diagnostics are performed at the card level on an individual basis and
results are sent back to the EMS system.
The Ethernet DSL system provides the unit self-test diagnostic to facilitate trouble isolation
and restoral. Unit self-tests verify the operation of the units themselves and are used to
determine whether the equipment is causing specific problems. When card-level
diagnostics are performed, the cards and circuits under test are taken out-of-service.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
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Test results are displayed as each diagnostic routine completes. Diagnostic self-tests are
performed upon start-up, and then only when requested by the element-management
system. This diagnostic causes the DSL loop to go through a retraining sequence and is
considered to be intrusive diagnostics.
6.8 System Status and Performance Management
The CAP DSL system utilizes a Reed Solomon forward error correction (FEC) algorithm and
a convoluted interlever to improve performance on noisy transmission lines.
The ATU-R can verify connectivity to the central office line and via loopbacks of F5 OAM
cells. Upon receiving this cell through the ADSL interface, the ATU-R will loop back this cell
to the originator via the ADSL network interface.
On normal power-down, the ATU-R will generate a “dying gasp” message to the ATU-C to
indicate a power-down status.
A visual indicator on the front panel READY LED provides an indication of severely errored
condition occurring on the DSL link. This errored card threshold is programmed into the
system via the element management system. Once the threshold has been crossed, the
READY LED will blink intermittent red.
A variety of statistics are maintained by the common control modules on performance of the
digital subscriber line (DSL). The ATU-R reads its performance monitoring data and then
forwards the data to the central office module for reporting via the element-management
system. The data that is collected includes:
• CODING VIOLATION (CV) – A CRC error over the DSL link. Note that there are
downstream coding violations and upstream. CV violations are use by the ATU-Cs to
calculate Errored Seconds (ES), Severely Errored Seconds (SES), and Unavailable
Seconds (UAS).
• DSL HEC (CELL HEADER ERROR CORRECTION BYTE) ERROR SECONDS (DHES) – A count
of one-second periods where at least one HEC Error was observed.
• SIGNAL-TO-NOISE MARGIN (SNM) – The current signal margin recorded.
• LINE ATTENUATION (ATTN) – The current line attenuation recorded.
7. Block Diagram
Figure 4 shows a block diagram of ATU-R operation.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
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10BaseT
ADSL
LINE LINE
DRIVER
A
NALOG
FRONT END DSL
TRANSCEIVER FRAMER
PROTOCOL
A
ND
CONTROL
PROCESSOR
CPE
INTERFACE
S-0141-A
Figure 4. 10BaseT Remote Block Diagram
8. Operation
The remote unit is designed to run unattended. After it has been installed, configured,
synchronized with the access line module, and passed the boot up tests, no further action is
required to operate it.
9. Installation
The ATU-R is installed on the customer premises and not at the central office. Figure 5
shows the remote unit.
S-0110P-A
Figure 5. Rate-Adaptive DSL Ethernet Remote Unit
9.1 Unpacking
Remove the ATU-R from the shipping box and verify the following items:
SuperVision® System Manual
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• One ATU-R Unit
• One Power Transformer (sold and packaged separately)
The following cables are required (but not supplied):
• 10BaseT Ethernet cable per IEEE 802.3
∗ Straight through cable used for connection to a PC
∗ Crossover cable used for connection to Ethernet hub
• 8-pin modular cable
• RJ11 6-pin modular cable
9.2 Installation Criteria
• Installation must be within 6 feet (182.88 cm) of an accessible domestic power
receptacle.
• Sturdy surface providing approximately 9.8 x 9.8 inch (25 x 25 cm) of mounting
surface area.
• Approximately 19.7 in. (50 cm) of front, rear, and top access clearance after the unit is
surface mounted.
• Unobtrusive but accessible location.
• Will operate up to 304.8 feet (100 M) from ATU-R to computer over 100-Ohm, Cat. 5
cable.
9.3 ATU-R Wiring
Figures 6 and 7 show how to connect an internal POTS splitter, if applicable.
SuperVision® System Manual
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9.3.1 Installation with an Internal POTS Splitter
TIP
RING
3
4
4
5DSL TIP
DSL RING
PHONE (RJ11) LINE
RX+
RX-
TX+
TX-
10BaseT
TO CPE
]
1
2
3
6
ATU-R
S-0111-A
Figure 6. Installation Diagram with an Internal POTS Splitter
Use the following procedure:
1. Connect the power transformer to the back of the unit and then plug into the wall
power receptacle.
2. Connect either an 8-pin module cable or a standard 6-pin telephone cable from the
LINE connector on back of the unit to the network jack.
3. Connect the proper Ethernet cable from the 10BaseT connector to the interface on
the CPE equipment (for example, the PC NIC card).
4. Connect the phone to connector phone connection on the back of the unit.
5. Power the unit ON.
6. By observing the READY LED, check the unit to ensure that the power self-test has
successfully completed, and that the unit is synchronized with the access line
module. It may take from 50 to 70 seconds for the unit to achieve line synchronization
with the central office ADSL unit. The READY LED illuminates to a steady green to
show that the unit is synchronized.
7. Verify the connection to the CPE by observing the LINK and ACTIVITY LEDs on the
front of the unit.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
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Rev. P2, 07/01/98
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10BT-R.DOC
14
9.3.2 Installation without an Internal POTS Splitter
4
5DSL TIP
DSL RING
LINE
RX+
RX-
TX+
TX-
10BaseT
TO CPE
]
1
2
3
6
ATU-R
S-0112-A
Figure 7. Installation Diagram without a POTS Splitter
Use the following procedure:
1. Connect the power transformer to the back of the unit and then plug into the wall power
receptacle.
2. Connect the 8-pin module cable or a standard 6-pin telephone cable from the LINE
connector on back of the unit to a POTS splitter (refer to POTS splitter data sheet for
instructions) or to the network jack if POTS service is not provided.
3. Connect the proper Ethernet cable from the 10BaseT connector on the back of the unit to
the interface on the CPE equipment (for example, the PC NIC card).
4. Power the unit ON.
5. By observing the READY LED, check the unit to ensure that the power self-test has
successfully completed, and that the unit is synchronized with the access line module. It
may take from 50 to 70 seconds for the unit to achieve line synchronization with the
central office ADSL unit. The READY LED illuminates to a steady green to show that the
unit is synchronized.
6. Verify the connection to the CPE by observing the LINK and ACTIVITY LEDs on the front of
the unit.
SuperVision® System Manual
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10. Maintenance
DO NOT FIELD-REPAIR EQUIPMENT. If the equipment is suspected of being faulty, see
the Product Service, Repair and Return section of the SuperVision Service/Technical
Support Section of this manual.
WARRANTY ADVISORY
Any attempt to repair or modify the equipment by
anyone other than an authorized Westell
representative will cause the warranty to be void.
10.1 Troubleshooting and Repair
If trouble is found while testing the equipment, verify that all connections are properly made
and that the unit is properly optioned. Troubleshooting and repair of the unit is limited to
isolating the fault to the ATU-R, then removing and replacing the ATU-R with a spare unit.
WARNING
Risk of electric shock. Voltages up to 140Vdc
(with reference to ground) may be present on
telecommunications circuits.
1. Check for faulty communication/signal lines external to the ATU-R.
2. Check for communication/signal lines connected to incorrect jacks, plugs, or
terminals.
If trouble persists, see the Product Service, Repair and Return procedures in the
SuperVision Service/Technical Support Section of this manual.
10.2 Visual Inspection
Visually inspect the unit for any obvious signs of a fault or damage.
• Burnt, heat blistered, or cracked plastic frame
• Loose parts within plastic frame
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
16
11. Specifications
DIMENSIONS
Height – 7.5 in. (19 cm)
Width – 7.78 in. (19.76 cm)
Depth – 1.9 in. (4.82 cm)
WEIGHT
2.30 lbs. (1.04 kg)
ENVIRONMENTAL
Ambient Operating Temperature – +23 to
+113°F (-5 to +45°C)
Relative Humidity – 5 to 95%, non-
condensing
Absolute Humidity – 1 to 29 g/m3
POWER SUPPLY
230/110 VAC (±10%) wall mount power
supply
POWER CONSUMPTION
7 Watts typical from 24 VAC
CONNECTORS
Power – MINI-DIN connector
DSL – one 8-pin modular jack
Alternate POTS – 6-pin modular jack RJ11
10BaseT Ethernet – One 8-pin modular jack
ETHERNET CONNECTOR PINOUT
An RJ-45 type that carries the Receive data
on pins 1 and 2, and the Transmit data on
pins 3 and 6.
ETHERNET INTERFACE
Provides transmit and receive data paths for
10BaseT Network Connection.
ADSL CONNECTOR PINOUT
The ADSL connector is a RJ-45 type that
carries combined ADSL and POTS signals on pins 4
and 5. The connector is compatible with an RJ11
connector with signal on pins 3 and 4.
DSL
DSL Line Code – Carrierless Amplitude Phase
Modulation (CAP)
DSL Rates – 640 kbps to 7.1 Mbps downstream and
91 kbps to 1.088 Mbps upstream
DSL Upstream Transmit Power – 13.3 dBm, typical
DSL Impedance – 100 Ohms
DSL Performance – Per Category 1 in ANSI T1.413
POTS FILTER
Internal or external
ELECTRICAL SAFETY–COMPLIES WITH:
Elect. safety requirements per UL 1459
Elect. safety requirements per GR-1089-CORE, Sec 7
Elect. requirements per EN60950
Elect. safety requirements per CSA 22.2. No. 0.7
COMPLIANCE
CE (Europe) – complies with 1997 CE requirements,
CSA (Canada), UL (US), FCC Part 15, Class B (ATU-
R)
TRADEMARKS
SuperVision is a U.S. registered trademark of Westell Technologies, Inc.
Information Copper Highway is trademarks of Westell Technologies, Inc.
AccessVision is a trademark of Atlantech Technologies Ltd.
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
17
INDEX
1
10BaseT Ethernet DSL Diagnostics, 9
B
Block Diagram, 10
Build Control, 1
C
Compatibility, 2
Configuration, 4
D
Document Control, 1
F
Features and Functions, 2
G
General Description, 1
I
Indicators, 6
Inspection, 2
Installation, 11
Installation Criteria, 12
Interfaces/Connectors, 7
M
Maintenance, 14
O
Operation, 11
P
Product Overview, 2
S
Signals, 9
Specifications, 16
System Status and Performance Management, 10
T
Transmission, 3
Troubleshooting and Repair, 15
U
Unpacking, 11
V
Visual Inspection, 15
W
Wiring, 12
SuperVision® System Manual
CAP Rate-Adaptive Ethernet DSL Remote Unit
A90-36R210W00
Part # 030-1010xx
A90
Rev. P2, 07/01/98
1998, Westell, Inc.
Release 1.2 Printed in the USA
10BT-R.DOC
18
FCC NOTICE:
Note: This equipment has been tested and found to comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an output on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.