ADTRAN HDSL 852 is a versatile and advanced telecommunications device designed to provide efficient and reliable data transmission over copper lines. It offers a range of capabilities that make it suitable for various applications, including:
-
Central office installation: The device can be installed in a central office to serve as the central connection point for HDSL circuits. It provides power and signal conditioning for the line units, enabling them to operate effectively.
-
Remote installation: The device can also be used in a remote location, connected to the central office via the HDSL circuit. It provides a convenient way to access and monitor the remote line unit, facilitating troubleshooting and maintenance.
ADTRAN HDSL 852 is a versatile and advanced telecommunications device designed to provide efficient and reliable data transmission over copper lines. It offers a range of capabilities that make it suitable for various applications, including:
-
Central office installation: The device can be installed in a central office to serve as the central connection point for HDSL circuits. It provides power and signal conditioning for the line units, enabling them to operate effectively.
-
Remote installation: The device can also be used in a remote location, connected to the central office via the HDSL circuit. It provides a convenient way to access and monitor the remote line unit, facilitating troubleshooting and maintenance.
161190852L2-5, Issue 361190852L2-5C
Section 61190852L2-5C
Issue 3, December 2001
CLEI # T1TSSRJF _ _
HDSL 852 Central Office Installation Kit
Installation and Maintence
Trademarks: Any brand names and product names included in this document are
trademarks, registered trademarks, or trade names of their respective holders.
1. GENERAL
This practice provides installation and operation
procedures for the ADTRAN HDSL Installation Kit
for the Central Office. The HDSL CO Installation Kit
is designed for use with the ADTRAN HDSL Remote
Installation Kit, part number 1190851L2. Figure 1 is
an illustration of the HDSL Central Office Installation
Shelf. This kit can house any standard 220 mechanics
card to include T1, HDSL, and HDSL2. This practice
is written around the HDSL application.
Revision History
Issue 3 revises order guide tables.
Features
The HDSL Central Office Installation Kit,
P/N 1190852L2, includes the following features:
• Compact construction installation unit.
• Local AC powering.
• Houses a standard E220 CO card, with optional
3192, DDM Plus, and Soneplex adapter inserts.
• Bantam to alligator connections.
• Versatile protective carrying case.
Adapter Inserts
Separately purchased adapter inserts configure the
E220 form factor to accomodate the following
mechanics:
• Insert E220/3192
P/N 1190852L22
FIGURES
Figure 1. HDSL 852 CO Installation Shelf ............. 1
Figure 2. HDSL Circuit Simulation ......................... 2
Figure 3. Front Panel Features ................................. 3
Figure 4. Rear Panel Feature ................................... 3
Figure 5. Pairing CO Installation Kit ....................... 3
Figure 6. Test Cables ............................................... 4
Figure 7. Testing Line Units .................................... 5
Figure 8. Pairing a Circuit ....................................... 5
Figure 9. T1 BERT Testing of an HDSL Circuit .... 6
Figure 10. Adapter Insert Installation ........................ 7
TABLES
Table 1. Line Units ................................................. 5
Table 2. Specifications ........................................... 7
Table 3. Ordering Guide for the 852 CO Shelf ...... 7
Table 4. Ordering Guide for the 851 Remote
Shelf .......................................................... 7
Figure 1. HDSL 852 CO Installation Shelf
CONTENTS
1. GENERAL .......................................................... 1
2. OPERATION ...................................................... 2
3. TESTING ............................................................ 5
4. SPECIFICATIONS ............................................. 7
5. MAINTENANCE ............................................... 7
6. WARRANTY AND CUSTOMER SERVICE ... 8
CAUTION:
RISK OF ELECTRICAL
SHOCK. M
AXIM
UM
VOLTAGES UP TO
-200 VDC M
AY BE
PRESENT ON
TELECOM
CIRCUITS.
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2 61190852L2-5, Issue 3 61190852L2-5C
• Insert E220/DDM+ form factor
P/N 1190852L23
• Insert E220/Soneplex form factor
P/N 1190852L24
NOTE
The installation kit and adapter inserts described
here are not compatible with previous kit and
adapter assemblies.
Description
The HDSL CO Installation Kit simulates the operation
of the central office end of an HDSL circuit (with
installed CO line unit).
Make-or-break jacks and signal jacks in each
installation kit provide access to the HDSL circuit’s
loop 1 and loop 2 signals. Inserting a test cable into a
jack breaks the HDSL circuit at that point and delivers
the signal out of the jack.
The jacks can be used to insert an HDSL installation
kit into an HDSL circuit at different points (such as
the central office end or remote end) in order to test
circuit or line unit operation.
The jacks can also be used to connect HDSL
installation kits together to simulate an HDSL circuit’s
signal path. A fully operational HDSL circuit can be
created by connecting a CO Installation Kit to a
remote installation kit, and installing HDSL line units.
See Figure 2 for an HDSL circuit simulation. To
simulate an HDSL circuit with a repeater, push IN the
repeater selection switch on the remote unit.
2. OPERATION
After unpacking the unit, inspect it for damage. If
damage is noted, file a claim with the carrier, then
notify ADTRAN. See Warranty and Customer
Service.
The CO Installation Kit is shipped complete with the
CO shelf, softcase, power cord, and dual bantam to
alligator clip cable.
Front Panel Features
The HDSL CO Installation Kit front panel features a
CO unit slot, two dual-bantam jacks, and two ground
lugs for ESD ground and earth ground. The CO unit
slot accepts an HDSL CO line unit. The CO LP1/LP2
signal jacks provide access to the CO line unit’s
(HTU-C) output signals to the remote end. These
signals are the loop 1 and loop 2 signals that drive the
HDSL circuit. The DSX TX and RX jacks provide
access to the DSX signals on a CO line unit installed
in the CO Installation Kit. These jacks can be used in
addition to DSX jacks on the front panel of the
HTU-C line unit. TX is an input jack and RX is an
output jack. See Figure 3 for a diagram of front panel
features.
Figure 2. HDSL Circuit Simulation
CO
DSX Access
Jacks
Remote
DS1 Access
Jacks
CO
LP1/LP2
Signal Jacks
Repeater CO
Side LP1/LP2
Signal Jacks
Repeater
In/Out
Switch
852
Shelf
CO
Bay
851
Shelf
Repeater
Bay
851
Shelf
Remote
Bay
Repeater
Remote Side
LP1/LP2
Make/Break
Jack
Remote
LP1/LP2
Make/Break
Jack
HDSL 852 CO Power Shelf HDSL 851 REPEATER/Remote Shelf
361190852L2-5, Issue 361190852L2-5C
Rear Panel Features
The rear panel (Figure 4) houses the AC power
receptical and lists compliance and electrical safety
precautions. Power is applied to the shelf upon
insertion of the power cord.
WARNING
On a live HDSL circuit, potentially dangerous
voltage may be present on the loop 1 and loop 2
signals. Use extreme caution when accessing
these signals at the LP1/LP2 jacks.
Powering the HDSL CO Installation Kit
1. Insert the AC Power Cord to power the Central
Office Installation Kit.
2. The ADTRAN HDSL Remote Installation Kit
(P/N 1190851L2) can be span powered by
installing cables between its LP1/LP2 signal
jacks on the Central Office Installation Kit. See
Figure 5.
Preventing ESD Damage
To prevent damage caused by electrostatic discharge
(ESD), follow these precautions when using the
HDSL Installation Kit.
1. Install the ground cable between ground and the
bottom ground lug on the front of the HDSL
Installation Kit.
2. When working with HDSL line units, make sure
the ESD wrist strap is attached to the top ground
lug on the front of the HDSL Installation Kit.
Figure 3. Front Panel Features
Figure 5. Pairing CO Installation Kit
Remote/Repeater Shelf
Distribution
Frame
Central Office Powering Shelf
Customer
Equipment
or NIU
HDSL
Circuit
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115 VAC
Figure 4. Rear Panel Feature
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) this device may not cause harmful interference, and
(2) this device must accept any interference received,
including interference that may cause undesirable
operation.
WARNING
~ LINE
120V 0.5 A 60HZ
FOR PROTECTION FROM
ELECTRICAL SHOCK HAZARD,
ENSURE PROPER FRAM GROUND
CONNECTION. FOR USE BY
QUALIFIED SERVICE
PERSONNEL ONLY.
POWER CODE (PC)
TELECOMMUNICATION CODE (TC)
INSTALLATION CODE (IC)
F
T
E
C
X
-
IN OUT
CAUTION:
RISK OF ELECTRICAL
SHOCK. MAXIMUM
VOLTAGES UP TO
-200 VDC MAY BE
PRESENT ON TELECOM
CIRCUITS.
1
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CO Unit DSX
TX and RX
Signal Jacks
CO Unit Slot
ESD
GND
Ground
Lugs
4 61190852L2-5, Issue 3 61190852L2-5C
Installing Line Units
The following steps describe how to install an HTU-C
line unit into the HDSL CO Installation Kit, connect
the line unit to the HDSL circuit, and remove the line
unit.
1. Locate the slot to install the HTU-C on the HDSL
Central Office Installation Kit.
NOTE
Before handling line units, connect the HDSL
Installation Kit to ground and connect the ESD
wrist strap to the installation kit.
2. Grasp the HTU-C by its front panel and align it
with the guides in the slot. Slide it into the slot
until it seats firmly with the connector at the rear.
3. Connect the HTU-C to the HDSL circuit by
installing a cable between the LP1 and LP2
signal jacks on the HDSL Installation Kit and the
HDSL circuit’s loop 1 and loop 2 twisted pairs.
Maintain signal polarity by observing the color
coding of the cable ends. Connect the CO LP1/
LP2 signal jacks to the loop 1 and loop 2 twisted
pairs, respectively, going to the remote end of the
HDSL circuit.
4. To remove an HTU-C, remove the patch cord
connecting the HTU-C to the HDSL circuit.
Pull the ejector lever on the bottom of the
HTU-C, or grasp it by its front panel and gently
pull it from the slot, observing ESD precautions.
Installing Test Cables
The HDSL Installation Kit is connected to the HDSL
circuit by installing test cables between the installation
kit’s LP1 and LP2 signal jacks and the twisted pair or
twisted pairs that form the HDSL circuit.
The cables are attached depending on the installation
as follows:
• For a single-pair HDSL installation, use a test
cable with a single-bantam end and two alligator
clips. Insert the cable’s bantam end in the LP1
signal jack, and attach each alligator clip to one
of the wires in the twisted pair.
• For a two-pair HDSL installation, use a test cable
with a dual-bantam end and four alligator clips.
Insert the cable’s bantam end in the LP1/LP2
signal jacks, and attach each set of alligator clips
to the wires in the corresponding twisted-pair.
• For ADTRAN HDSL, the loops are insensitive to
tip-ring reversal. For other applications, such as
standard T1 testing, the following describes the
polarity of the test set. The bantam to alligator-
clip test cables in the HDSL Installation Kit
indicate tip-and-ring connectivity as follows:
– The alligator-clip cable ends are color-coded
red (tip) and green (ring) loop 1, yellow (tip)
and black (ring) loop 2.
– The sleeves on the alligator-clip cable ends
are labeled to match their corresponding
bantam end.
– When installing a test cable, maintain signal
polarity by matching the LP1/LP2 bantam
cable ends to the correct alligator-clip ends
(LP1 bantam to loop 1 alligator clips, and LP2
bantam to loop 2 alligator clips). It does not
matter which twisted-pair is considered loop 1
or loop 2 as long as the designations are
consistent. (See Figure 6).
C A U T I O N
C A U T I O N
!
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
Figure 6. Test Cables
Loop 1
Loop 2
Red
Loop 1 (T)
Loop 1 (R)
Loop 2 (T)
Loop 2 (R)
Green
Yellow
Black
561190852L2-5, Issue 361190852L2-5C
3. TESTING
Testing Line Units
Refer to Figure 7 for test arrangement.
CAUTION
Before handling line units, make sure the HDSL
Installation Kit is connected to ground and the
ESD wrist strap is connected to the installation
kit.
1. Install the line unit to be tested in the appropriate
HDSL Installation Kit.
If the required line unit(s) is installed in another
HDSL Installation Kit, install patch cables between
the LP1/LP2 signal jacks on each HDSL Installation
Kit. If the required line unit(s) is in the HDSL circuit,
install patch cables between the HDSL Installation
Kit’s LP1/LP2 signal jacks and the HDSL circuit’s
loop 1 and loop 2 twisted-pairs.
4. If a repeater line unit is being tested, or if the
operation of a CO line unit is being tested with a
repeater, place the repeater selection button on
the remote unit IN. To perform the test without
the repeater, place the repeater button OUT on
the remote installation kit.
5. When power is applied, the HDSL Installation
Kit tests the operation of the line unit.
The indicators on the line unit front panel should be
observed to determine whether the line unit is
operational.
Powering a Circuit
The HDSL CO Installation Kit can be used to send a
powered HDSL signal from the distribution frame of a
serving office (see Figure 8). Access to the central
office side of the cable span must be obtained to
perform this procedure.
Figure 8. Powering a Circuit
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Table 1. Line Units
2. Verify that the other required line units are
available for the test (see Table 1). The required
line unit(s) can either be installed in another
HDSL Installation Kit, or in an HDSL circuit.
NOTE
Verify that the required line units are operational
before proceeding.
3. Install patch cables to make the necessary
connections between the line unit being tested
and the required line units.
Figure 7. Testing Line Units
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Patch
Cables
CO Line Unit Being
Tested
115 VAC
Known Good CO
Line Unit
Remote Line Unit
Being Tested
Known Good Remote
Line Unit
Distribution
Frame
HDSL
Circuit
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Central Office Installation Kit
11.5 Vac
Distribution
Frame
Office
Equipment
Customer
Equipment
or NIU
Remote HDSL
Installation
Kit
HDSL Cable
Access
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1190852L2
HDSL 852 CO POWER
R
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6 61190852L2-5, Issue 3 61190852L2-5C
WARNING
On a live HDSL circuit, potentially dangerous
voltage may be present on the loop 1 and loop 2
signals. Use extreme caution when accessing
these signals.
1. Install an HTU-C or other line unit in the HDSL
CO Installation Kit.
NOTE
Before handling the line unit, make sure the
HDSL Installation Kit is connected to ground
and the ESD wrist-strap is connected to the
HDSL Installation Kit.
2. Install a test cable to make the following
connections. Be sure to maintain signal polarity
with the test cable. Connect the CO LP1 signal
jack to the loop 1 twisted-pair, and connect the
CO LP2 signal jack to the loop 2 twisted-pair.
3. When the HDSL CO Installation Kit is ON, the
HTU-C or other line unit will power the two
loops.
T1 BERT Testing of an HDSL Circuit
This section describes how to perform a T1 Bit-Error
Rate Test (BERT) using an HDSL Installation Kit and
a T1 BERT tester (See Figure 9).
With a single HDSL Installation Kit and T1 BERT
tester, a loopback test of the cable span can be
performed from the central office end or from the
remote end. With CO and Remote HDSL Installation
Kits and two BERT testers, an end-to-end test of the
entire cable span can be performed. The directions for
performing the BERT test are as follows.
1. Install test cables to make the following
connections between the T1 BERT tester and the
HTU-C installed in the HDSL Installation Kit.
For an end-to-end test, make the connections at
both ends of the cable span.
• Connect the BERT tester’s DSX-1 RX jack to
the DS1 line receive jack on the front of the
HTU-C or HTU-R.
• Connect the BERT testers DSX-1 TX jack to
the DS1 line transmit jack on front panel of
the HTU-C or HTU-R.
Figure 9. T1 BERT Testing of an HDSL Circuit
Remote/Repeater Shelf
End-to-End BERT
Serving Office
DS1 Receive
DS1 Transmit
Central Office Powering Shelf
LP1/LP2
LP1/LP2
Customer
Equipment
HDSL
Circuit
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1246001L2
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12345
T1 BERT
Tester
DS1 Receive
DS1 Transmit
Serving Office
T1 BERT
Tester
DS1 Receive
DS1 Transmit
Central Office Powering Shelf
Loopback BERT
LP1/LP2 Signals
HDSL
Circuit
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12345
Remote End
Loopback
NOTE
As an alternative to the front panel DS1 signal
jacks, use the DSX RX and TX jacks located just
above the line unit slot on the HDSL Installation
Kit. These jacks correspond to line unit operation,
which means that the BERT tester’s DS1 transmit
jack must be connected to the installation kit’s
DSX TX jack, and the tester’s DS1 receive jack
to the installation kit’s DSX RX jack.
2. Install a test cable to connect the HDSL
Installation Kit to the HDSL circuit. For end-
to-end test, make the connections at both ends of
the cable span.
• Connect the HDSL Installation Kit LP1
signal jack to the loop 1 twisted pair.
• Connect the HDSL Installation Kit LP2
signal jack to the loop 2 twisted pair.
3. If a loopback BERT test is being performed, loop
back the far end.
4. Turn ON the HDSL Installation Kit and
T1 BERT tester. If an end-to-end test is being
run, turn on both installation kits and testers.
5. Run a T1 BERT test over the HDSL cable span.
761190852L2-5, Issue 361190852L2-5C
4. SPECIFICATIONS
Refer to Table 2 for HDSL CO Installation Kit
specifications.
Table 2. Specifications
Table 4. Ordering Guide for the 851 Remote
Shelf
5. MAINTENANCE
The HDSL CO Installation Kit does not require
routine maintenance for normal operation. ADTRAN
does not recommend that repairs be performed in the
field. Repair services are obtained by returning the
defective unit to ADTRAN Customer and Product
Service.
Table 3. Ordering Guide for the 852 CO Shelf
Supporting Products and Replacement Parts
Table 3 provides a list of supporting products and
replacement parts that can be ordered for the CO
Installation Kit products. Table 4 provides a list of
Remote Installation Kit products. Figure 10 shows
the 852 CO Shelf with adapter insert partially
installed.
Figure 10. Adapter Insert Installation
CAUTION:
RISK OF ELECTRICAL
SHOCK. MAXIMUM
VOLTAGES UP TO
-200 VDC MAY BE
PRESENT ON TELECOM
CIRCUITS.
1
1
9
0
8
5
2
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2
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LP1
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8 61190852L2-5, Issue 3 61190852L2-5C
6. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within ten
(10) years from the date of shipment if it does not meet
its published specifications or fails while in service.
Refer to ADTRAN U.S. and Canada Carrier Networks
Equipment Warranty, document 60000087-10.
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
For service, CAPS requests, or further information,
contact one of the following numbers:
ADTRAN Sales
Pricing/Availability
(800) 827-0807
ADTRAN Technical Support
Pre-sales Applications/Post-sales Technical Assistance
(800) 726-8663
Standard hours: Monday-Friday, 7 a.m. - 7 p.m. CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS
Return for Repair/Upgrade
(256) 963-8722
Repair and Return Address
ADTRAN, Inc.
CAPS Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
ADTRAN HDSL 852 is a versatile and advanced telecommunications device designed to provide efficient and reliable data transmission over copper lines. It offers a range of capabilities that make it suitable for various applications, including:
-
Central office installation: The device can be installed in a central office to serve as the central connection point for HDSL circuits. It provides power and signal conditioning for the line units, enabling them to operate effectively.
-
Remote installation: The device can also be used in a remote location, connected to the central office via the HDSL circuit. It provides a convenient way to access and monitor the remote line unit, facilitating troubleshooting and maintenance.
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