ADTRAN HDSL Central Office Installation Kit Instruction Manual

161190852L1-5, Issue 161190852L1-5A
Section 61190852L1-5A
Issue 1, December 1999
CLEI # T1TSSR0F _ _
HDSL 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 ith the ADTRAN HDSL Remote
Installation Kit, part number 1190851L1. 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 ritten around the HDSL application.
Revision History
This is the initial release of this document. Future
revisions to this document ill be explained in this
subsection.
Features
The HDSL Installation Kit for the Central Office, part
number 1190852L1, includes the follo ing features:
• Compact Construction Installation Unit.
• Local AC po ering.
• Houses a standard 220 CO card, ith optional
3192 and DDM Plus adapter cards.
• Bantam to alligator connections.
• Versatile protective carrying case.
The HDSL CO Installation Kit simulates the operation
of the central office end of an HDSL circuit ( ith
installed CO line unit).
Make-or-break 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.
Figure 1. HDSL CO Installation Shelf
CONTENTS
1. GENERAL..........................................................1
2. OPERATION......................................................2
3. TESTING............................................................4
4. SPECIFICATIONS ............................................6
5. MAINTENANCE...............................................7
6. WARRANTY AND CUSTOMER SERVICE...7
FIGURES
Figure 1. HDSL CO Installation Shelf......................1
Figure 2. HDSL Circuit Simulation ..........................2
Figure 3. Front Panel Features .................................. 2
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
TABLES
Table 1. Line Units....................................................5
Table 2. Specifications .............................................. 6
Table 3. Ordering Guide for the CO Shelf................ 6
Table 4 Ordering Guide for the Remote Shelf.........7
CO Power
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
266 133 0
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS

261190852L1-5, Issue 1 61190852L1-5A
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 ith a repeater, push IN
the repeater selection s itch on the remote unit.
2. OPERATION
After unpacking the unit, inspect it for damage. If
damage is noted, file a claim ith the carrier, then
notify ADTRAN Customer Service, see section 6.
The CO Installation Kit should be shipped complete
ith the CO shelf, softcase, po er cord, and dual
bantam to alligator clip cable.
Front Panel Features
The HDSL CO Installation Kit front panel features a
CO unit slot, t o dual-bantam jacks, and t o 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 DS1 TX and RX jacks provide
access to the DS1 signals on a CO line unit installed in
CO
DS1 Access
Jacks
Remote
DS1 Access
Jacks
CO
LP1/LP2
Signal Jacks
Repeater CO
Side LP1/LP2
Signal Jacks
Repeater
In/Out
Switch
CO
Line Unit
Bay
Repeater
Line Unit
Bay
Remote
Line Unit
Bay
Repeater
Remote Side
LP1/LP2
Make/Break
Jack
Remote
LP1/LP2
Make/Break
Jack
HDSL CO Power Shelf HDSL 851 Remote/REPEATER Shelf
Figure 2. HDSL Circuit Simulation
HDSL 852
CO POWER
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGES MAY BE
PRESENT AT ALL
FRONT PANEL JACKS
ESD
GND
GND 1190852L1
DS1
TX RX
HDSL
LP1 LP2
CO LP1/LP2
Signal Jacks
CO Unit DS1
TX and RX
Signal Jacks
CO Unit Slot
Ground Lugs
Figure 3. Front Panel Features
the CO Installation Kit. These jacks can be used in
addition to DS1 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.

361190852L1-5, Issue 161190852L1-5A
Rear Panel Features
The HDSL CO Installation Kit rear panel features an
AC po er s itch and connectors. The AC po er
s itch controls po er to the CO Installation Kit. If
the s itch is set in the ON position, the AC po er
s itches on hen the Installation Kit is connected to a
115 VAC po er outlet. If the s itch is set in the OFF
position, the AC po er is s itched off. The 1 amp,
250 VAC, slo -blo fuse protects the electrical
circuitry from po er surges and voltage spikes. Use a
small scre driver or similar tool to pull out the fuse
cover to access the fuse. A spare fuse is provided in
the fuse housing. See Figure 4 for a diagram of Rear
Panel Features.
CAUTION
Disconnect power before accessing the fuse.
If the fuse is ba , replace it only with a similar
1 amp, 250 VAC, slow-blow fuse.
CAUTION
In a live HDSL circuit, potentially angerous
voltage may be present on the loop 1 an loop
2 signals. Use extreme caution when accessing
these signals at the LP1/LP2 jacks.
AC POWER SWITCH
(0=OFF, I=ON)
FUSE COVER
AC POWER CORD RECEPTACLE
Figure 4. Rear Panel Feature
Powering the HDSL CO Installation Kit (See
Figure 5)
1. With the AC po er s itch in the OFF position,
connect the AC po er cord bet een the AC
po er cord receptacle (at the rear of the Central
Office Installation Kit) and a grounded 115 VAC
po er outlet.
2. Press the AC po er s itch ON to po er the
Central Office Installation Kit.
3. The ADTRAN HDSL Remote Installation Kit
(part number 1190851L1) can be span po ered
by installing cables bet een its LP1/LP2 signal
jacks and the LP1/LP2 signal jacks on the Central
Office Installation Kit.
COPower
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
2661330
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS
1190851L1
HDSL 851 REMOTE/REPEATER
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAY
BEPRESENT
ATALL
FRONTPANEL
HDSLJACKS
ESD
GND
DS1
REMOTE
CABLE
PAIRS
RPTRTO
REMOTE
CBLPAIRS
TX RX
LP1
REPEATER
C.O.CABLE
PAIRS
LP2 LP1 LP2LP1
IN OUTLP2
ATTACHTO
EARTHGND
RPTR
LBK
LBK
AMI
(GRN)
ALM
DS1
LP2
H
D
S
L
R
S
2
3
2
L
O
C
R
E
M
LP1
SF
(GRN)
B8ZS
(YEL)
1245026L1
ESF
(YEL)
TX
BRG
RX
Central Office Power Shelf
115 VAC
Remote/Repeater Shelf
Distribution
Frame
Customer
Equipment
or NIU
HDSL
Circuit
Figure 5. Pairing CO Installation Kit
Preventing ESD Damage
To prevent damage caused by electrostatic discharge
(ESD), follo these precautions hen using the
HDSL Installation Kit.
1. Install the earth ground cable bet een earth
ground and the bottom ground lug on the front of
the HDSL Installation Kit.
2. When orking ith HDSL line units, make sure
the ESD rist strap is attached to the top ground
lug on the front of the HDSL Installation Kit.
Installing Line Units
The follo ing steps describe ho 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 han ling line units, connect the HDSL
Installation Kit to earth groun an connect
the ESD wrist strap to the Installation Kit.
2. Grasp HTU-C by its front panel and align it ith
the guides in the slot. Slide it into the slot until it
seats firmly ith the connector at the rear.

461190852L1-5, Issue 1 61190852L1-5A
3. Connect the HTU-C to the HDSL circuit by
installing a cable bet een the LP1 and LP2
signal jacks on the HDSL Installation Kit and the
HDSL circuit’s loop 1 and loop 2 t isted 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 t isted
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 bet een the
Installation Kit’s LP1 and LP2 signal jacks and the
t isted-pair or t isted-pairs that form the HDSL
circuit. The cables are attached depending on the
installation as follo s:
• For a single-pair HDSL installation, use a test
cable ith a single-bantam end and t o alligator
clips. Insert the cable’s bantam end in the LP1
signal jack, and attach each alligator clip to one
of the ires in the t isted pair.
• For a t o-pair HDSL installation, use a test cable
ith 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 ires in the corresponding t isted-pair.
• For ADTRAN HDSL, the loops are insensitive to
tip-ring reversal. For other applications, such as
standard T1 testing, the follo ing 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 follo s:
• The alligator-clip cable ends are color-coded
black (tip) and red (ring), yello (tip) and green
(ring).
• 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 slips, and LP2 bantam
to loop 2 alligator clips). It does not matter
hich t isted-pair is considered loop 1 or loop 2
as long as the designations are consistent. (See
Figure 6).
Loop 1
Loop 2
Black
Loop x (T)
Loop x (R)
Loop y (T)
Loop y (R)
Red
Yellow
Green
Figure 6. Test Cables
3. TESTING
Testing Line Units (See Figure 7)
1. Install the line unit to be tested in the appropriate
HDSL Installation Kit.
CAUTION
Before han ling line units, make sure the
HDSL Installation Kit is connecte to earth
groun an the ESD wrist strap is connecte
to the Installation Kit.
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 require line units are goo
before procee ing.
3. Install patch cables to make the necessary
connections bet een the line unit being tested
and the required line units.
If the required line unit (s) is installed in another
HDSL Installation Kit, install patch cables bet een
the LP1/LP2 signal jacks on each HDSL Installation
Kit. If the required line unit (s) is in the HDSL
circuit, install patch cables bet een the HDSL
Installation Kit’s LP1/LP2 signal jacks and the HDSL
circuit’s loop 1 and loop 2 t isted-pairs.
4. If a repeater line unit is being tested, or if the
operation of a CO line unit is being tested ith a
repeater, make sure that the repeater selection
button on the Remote Unit is IN. To perform the
test ithout the repeater, make sure the repeater
button is OUT on the Remote Installation Kit.

561190852L1-5, Issue 161190852L1-5A
5. When po er 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 hether the line unit is
operational.
NOTE
Before han ling the line unit, make sure the
HDSL Installation Kit is connecte to earth
groun an the ESD wrist-strap is connecte
to the HDSL Installation Kit.
WARNING
In a live HDSL circuit, potentially angerous
voltage may be present on the loop 1 an loop
2 signals. Use extreme caution when accessing
these signals.
2. Install a test cable to make the follo ing
connections. Be sure to maintain signal polarity
ith the test cable. Connect the CO LP1 signal
jack to the loop 1 t isted-pair, and connect the
CO LP2 signal jack to the loop 2 t isted-pair.
3. When the HDSL CO Installation Kit is s itched
ON, the HTU-C or other line unit ill po er the
t o loops.
COPower
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
2661330
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS
Central Office Powering Shelf
115 VAC
Distribution
Frame
Office
Equipment
Customer
Equipment
or NIU
Remote HDSL
Installation
Kit
HDSL Cable Access
Figure 8. Powering a Circuit
T1 BERT Testing of an HDSL Circuit (See
Figure 9)
This section describes ho to perform a T1 Bit-Error
Rate Test (BERT) using an HDSL Installation Kit and
a T1 BERT tester.
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 t o BERT testers, an end-to-end test of the
entire cable span can be performed. The directions for
performing the BERT test are as follo s.
Figure 7. Testing Line Units
COPower
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
2661330
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS
COPower
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
2661330
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS
1190851L1
HDSL851REMOTE/REPEATER
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAY
BEPRESENT
ATALL
FRONTPANEL
HDSLJACKS
ESD
GND
DS1
REMOTE
CABLE
PAIRS
RPTRTO
REMOTE
CBLPAIRS
TXRX
LP1
REPEATER
C.O.CABLE
PAIRS
LP2LP1LP2LP1
INOUTLP2
ATTACHTO
EARTHGND
RPTR
LBK
LBK
AMI
(GRN)
ALM
DS1
LP2
H
D
S
L
R
S
2
3
2
L
O
C
R
E
M
LP1
SF
(GRN)
B8ZS
(YEL)
1245026L1
ESF
(YEL)
TX
BRG
RX
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
HRE
1246041L1
PWR
LP1
LP2
LP1
LP2
LBK
1190851L1
HDSL851REMOTE/REPEATER
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAY
BEPRESENT
ATALL
FRONTPANEL
HDSLJACKS
ESD
GND
DS1
REMOTE
CABLE
PAIRS
RPTRTO
REMOTE
CBLPAIRS
TXRX
LP1
REPEATER
C.O.CABLE
PAIRS
LP2LP1LP2LP1
INOUTLP2
ATTACHTO
EARTHGND
RPTR
LBK
LBK
AMI
(GRN)
ALM
DS1
LP2
H
D
S
L
R
S
2
3
2
L
O
C
R
E
M
LP1
SF
(GRN)
B8ZS
(YEL)
1245026L1
ESF
(YEL)
TX
BRG
RX
HRE
1246041L1
PWR
LP1
LP2
LP1
LP2
LBK
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Table 1. Line Units
Powering a Circuit (See Figure 8)
The HDSL CO Installation Kit can be used to send a
po ered HDSL signal from the distribution frame of a
serving office. Access to the central office side of the
cable span must be obtained to perform this
procedure.
1. Install an HTU-C or other line unit in the HDSL
CO Installation Kit.

661190852L1-5, Issue 1 61190852L1-5A
1. Install test cables to make the follo ing
connections bet een 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.
NOTE
As an alternative to the front panel DS1
signal jacks, use the DS1 RX an TX jacks
locate just above the line unit slot on the
HDSL Installation Kit. These jacks
correspon to line unit operation, which
means that the BERT tester’s DS1 transmit
jack must be connecte to the Installation
Kit’s DS1 TX jack, an the tester’s DS1 receive
jack to the Installation Kit’s DS1 RX jack.
2. Install a test cable to connect the HDSL
Installation Kit to the HDSL circuit. For and
end-to-end test, make the connections at both
ends of the cable span.
• Connect the HDSL Installation Kit’s LP1 signal
jack to the loop 1 t isted pair.
• Connect the HDSL Installation Kit’s LP2 signal
jack to the loop 2 t isted 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.
4. SPECIFICATIONS
Refer to Table 2 for HDSL CO Installation Kit
specifications.
Supporting Pro ucts an 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.
COPower
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
2661330
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS
COPower
1190852L1
TXRX
HDSL
DS1
LP1LP2
ESD
GND
GND
DSX-1
LBO
B8ZS
FRM
ESF
NIULBDIS
LBTIMEOUTDIS
533
399
2661330
EXT
1246001L2
LBK
ALM
DSX
DSLTX
RX
TX
RX
M
O
N
E
Q
HTU-CM
AMI
UFRM
SF
EN
EN
12345
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAYBE
PRESENTATALL
FRONTPANELJACKS
1190851L1
HDSL851REMOTE/REPEATER
WARNING
POTENTIALLY
HAZARDOUS
VOLTAGESMAY
BEPRESENT
ATALL
FRONTPANEL
HDSLJACKS
ESD
GND
DS1
REMOTE
CABLE
PAIRS
RPTRTO
REMOTE
CBLPAIRS
TXRX
LP1
REPEATER
C.O.CABLE
PAIRS
LP2LP1LP2LP1
INOUTLP2
ATTACHTO
EARTHGND
RPTR
LBK
LBK
AMI
(GRN)
ALM
DS1
LP2
H
D
S
L
R
S
2
3
2
L
O
C
R
E
M
LP1
SF
(GRN)
B8ZS
(YEL)
1245026L1
ESF
(YEL)
TX
BRG
RX
Remote/Repeater Shelf
Serving Office
T1 BERT Tester DS1 Receive
DS1 Transmit
Central Office Powering Shelf
End-to-End BERT
Loopback BERT
LP1/LP2 Signals
Remote End
Loopback
HDSL
Circuit
Serving Office
T1 BERT Tester DS1 Receive
DS1 Transmit
T1 BERT Tester
DS1 Receive
DS1 Transmit
Central Office Powering Í Shelf
LP1/LP2 LP1/LP2
Customer
Equipment
HDSL
Circuit
Figure 9. T1 BERT Testing of an HDSL Circuit
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Table 2. Specifications
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Table 3. Ordering Guide for the CO Shelf

761190852L1-5, Issue 161190852L1-5A
5. MAINTENANCE
The HDSL CO Installation Kit does not require
routine maintenance for design 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 (CAPS).
6. WARRANTY AND CUSTOMER SERVICE
ADTRAN ill replace or repair this product ithin 10
years from the date of shipment if it does not meet its
published specifications or fails hile in service (see
ADTRAN Carrier Network Equipment Warranty,
Repair, and Return Policy and Procedure, document
60000087-10A).
Contact Customer and Product Service (CAPS) prior
to returning equipment to ADTRAN.
For service, CAPS requests, or further information,
contact one of the follo ing numbers:
Part Number
1190852L1
ADTRAN Sales - Pricing and Availability
[phone]
ADTRAN Technical Support - Presales
Applications/Post-sale Technical Assistance
[phone]
Standard hours: Monday-Friday, 7 am-7 pm CST
Emergency hours: 7 days/week, 24 hours/day
ADTRAN Repair/CAPS - Return for repair/
upgrade
[phone]
Repair and Return Address
ADTRAN, Inc.
Customer & Product Service (CAPS)
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
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tf51,itluMotmatnaBelgniS,.yssAelbaC300AT5213
flehStseTetomeR158,esaCtfoS2000513
draCsseccAtseT004T/002T1L5604421
Table 4 Ordering Guide for the Remote Shelf