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2. Install a test cable to make the following
connections. Be sure to maintain signal polarity
with the test cables. Connect the repeater central
office side LP1 signal jack to the loop 1 twisted-
pair from the central office end, and connect the
repeater central office side LP2 signal jack to the
loop 2 twisted-pair form the central office end.
3. Install another test cable to connect the repeater
remote LP1 signal jack to the loop 1 twisted-pair
going to the remote end, and connect the repeater
remote LP2 signal jack to the loop 2 twisted-pair
going to the remote.
4. Make sure that the repeater selection button is IN
to insert the HDSL Remote Installation Kit
repeater into the circuit. Make sure the repeater
selection button is OUT to remove the repeater
from the circuit.
5. When power is applied to the HDSL circuit, the
HDSL Remote Installation Kit can be used to test
repeater line units, or the LP1/LP2 signal jacks
can be used to access the circuit's loop 1 and
loop 2 signals.
NOTE
The repeater selection button (IN/OUT) can
be used to observe the operation of the HDSL
circuit with and without a repeater.
Accessing an HDSL Circuit from the Remote
End (See Figure 7)
The HDSL Remote Installation Kit can be used to
access the HDSL circuit from the remote end, or to
simulate the remote end for testing purposes. The
process is as follows:
1. Install and HDSL remote line unit in the HDSL
Installation Kit. Make sure the HDSL Assistant
is connected to earth ground, and the ESD wrist
strap is connected to the Installation Kit.
WARNING
In 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.
2. Install a test cable to make the following
connections. Be sure to maintain signal polarity
with the test cable.
6
• Connect the remote LP1 signal jack to the
loop 1 twisted pair.
• Connect the remote LP2 signal jack to the
loop 2 twisted pair.
3. When power is applied to the HDSL circuit, the
HDSL Installation Kit can be used to test remote
line units, or the LP1/LP2 signal jacks can be
used to access the circuit's loop 1 and loop 2
signals.
CO Unit
Figure 7. Accessing an HDSL Circuit
T1 BERT Testing of an HDSL Circuit (See
Figure 8)
This section describes how to perform a T1 Bit-Error
Rate Test (BERT) using an HDSL Installation Kit and
a T1 BERT tester.
Serving Office
T1 BERT Tester
Serving Office
DS1 Receive
T1 BERT Tester
DS1 Transmit
Figure 8. T1 BERT Testing of an HDSL Circuit
61190851L1-5, Issue 1
RX
TX
LP2
LP1
DS 1
LP1 LP2
RP TR
OU T
LP2
IN
LP1
TE
RE MO
CA BL E
1
RP TR TO
1245 026L
TE
PA IRS
RE MO
IRS
CB L PA
R
RE PE ATE
BL E
C.O . CA
H
LP1
PA IRS
D
S
LP2
L
DS1
ALM
SF
ESF
(GRN)
(YEL)
AMI
B8ZS
(GRN)
(YEL)
LBK
L
R
O
E
C
M
LBK
TX
ING
BRG
WA RN
RX
TIA LLY
PO TEN
DO US
HA ZAR
Y
ES MA
VOL TAG
SEN T
R
BE PRE
S
AT ALL
2
3
PAN EL
FRO NT
2
JAC KS
HD SL
ES D
GN D
E R
H TO
E P E A T
ATT AC
GN D
EA RTH
M O T E /R
1L1
119 085
85 1 R E
H D S L
Remote Installation Kit
from the Remote end
Loopback BERT
HDSL
Circuit
LP1/LP2 Signals
DS1 Receive
DS1 Transmit
LP1 LP2
RX
TX
HDSL
DS1
HTU -CM
L2
1246001
133
0
266
DSX-1
399
EXT
LBO
533
AMI
er
B8ZS
FRM
UFRM
CO Pow
ESF
SF
EN
NIU LB DIS
EN
LB TIMEOUT
DIS
TX
DSL
M
O
DSX
N
RX
ALM
TX
LBK
Q
E
RX
WARN
ING
TIALLY
POTEN
HAZAR
DOUS
GES MAY
BE
VOLTA
NT AT
ALL
PRESE
PANEL
JACKS
FRONT
ESD
GND
GND
119085
2L1
Central Office Powering Shelf
End-to-End BERT
HDSL
Circuit
LP1/LP2
LP1/LP2
LP1
LP2
LP1 LP2
DS1
LP1 LP2
RPTR
RX
LP2
IN
OUT
TX
LP1
REMO
TE
HDSL
RPTR TO
CABL E
1245026
DS1
TE
PAIRS
CBL PAIRS
REMO
REPE ATER
E
HTU -CM
C.O. CABL
H
1246001
L2
PAIRS
D
133
0
L
S
266
EXT
DSX-1
LBO
399
533
ESF
B8ZS
UFRM
AMI
er
(YEL)
FRM
SF
CO Pow
B8ZS
(YEL)
NIU LB DIS
ESF
EN
LB TIMEOUT
DIS
EN
R
E
DSL
TX
M
M
LBK
N
O
DSX
RX
TX
ALM
TX
LBK
E
ING
BRG
Q
ING
WARN
RX
RX
WARN
POTEN
TIALLY
TIALLY
DOUS
POTEN
DOUS
HAZAR
GES MAY
HAZAR
BE
VOLTA
R
GES MAY
BE PRESE
NT
S
VOLTA
NT AT
ALL
AT ALL
2
PRESE
JACKS
3
FRONT
PANEL
FRONT
PANEL
2
JACKS
HDSL
ESD
ESD
GND
GND
GND
ATTAC
H TO
EARTH
MO TE /RE
GND
2L1
851 RE
119085
HD SL
Remote/Repeater Shelf
Central Office Powering Í Shelf
61190851L1-5A
Customer
Equipment
or NIU
Remote End
Loopback
Customer
Equipment
DS1 Transmit
T1 BERT Tester
DS1 Receive
TX
RX
L1
LP1
LP2
DS1
ALM
SF
(GRN)
AMI
(GRN)
LBK
L
O
C
PE AT ER
1L1
119085
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