Table of Contents
Advertisement
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.
Table 1. Line Units
L
n i
e
U
n
t i
B
e
n i
g
T
e
s
e t
d
C
O
i l
e n
n u
t i
R
e
m
o
e t
i l
e n
n u
t i
R
e
e p
t a
r e
i l
e n
n u
t i
*
T
o
e t
t s
p o
r e
i t a
n o
i w
h t
a
e r
e p
t a
r e
a ,
*
A
l l
i l
e n
n u
s t i
a
e r
p
r u
h c
s a
d e
e s
a p
a r
NOTE
Verify that the required line units are good
before proceeding.
3. Install patch cables to make the necessary
connections between 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 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, make sure that the repeater selection
button on the Remote Unit is IN. To perform the
test without the repeater, make sure the repeater
button is 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.
Adding a Repeater to an HDSL Circuit (See
Figure 6)
This section describes the procedure for adding a
repeater into a circuit to verify the operation of a
currently installed repeater, or to determine whether
the cable span might work better with a repeater.
61190851L1-5A
A
d
d
t i
o i
n
l a
R
e
q
i u
e r
d
L
n i
e
U
R
e
m
o
e t
i l
e n
u
i n
* t
C
O
i l
e n
u
i n
* t
C
O
i l
e n
n u
t i
R
e
m
o
e t
i l
e n
n u
t i
e r
e p
t a
r e
i l
e n
n u
t i
s i
l a
o s
r
q e
i u
e r
. d
e t
. y l
61190851L1-5, Issue 1
115 VAC
CO Line Unit Being Tested
i n
s t
Distribution
Known Good CO Line Unit
Figure 5. Testing HDSL Live Units
To perform this procedure, access to the cable span at
a midpoint, such as a cross-connect, must be obtained.
The steps are as follows:
1. Install an HDSL repeater line unit in the Remote
Installation Kit. Before handling the line unit,
make sure the HDSL Assistant is connected to
earth ground and the ESD wrist strap is
connected to the Installation Kit.
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.
CO Unit
Figure 6. Adding a Repeater to HDSL Circuit
Patch Cables
RX
LP1 LP2
TX
LP2
TX
RX
LP1
LP1 LP2
DS1
HDSL
RPTR
DS1
OUT
LP1
LP2
IN
TE
CABL E
REMO
L1
HTU -CM
RPTR TO
1245026
REMO
TE
PAIR S
124600
1L2
CBL PAIR
S
133
REPE ATER
266
0
E
HRE
EXT
C.O. CABL
124604
1L1
H
LP1
DSX-1
399
PAIR S
D
LBO
S
LP2
533
L
AMI
we r
DS1
B8ZS
UFRM
FRM
SF
CO Po
ALM
NIU LB DIS
ESF
EN
SF
DIS
EN
PWR
ESF
(GRN)
LB TIMEOUT
(YEL)
AMI
LP1
B8ZS
(GRN)
TX
(YEL)
DSL
M
LP2
LBK
N
O
L
DSX
RX
LP1
R
O
E
C
ALM
TX
LP2
M
LBK
E
LBK
Q
LBK
RX
WARN
ING
TX
LY
POTE NTIAL
ING
BRG
HAZA RDOU
S
WARN
RX
BE
POTE NTIAL
LY
GES MAY
S
VOLTA
AT ALL
HAZA RDOU
PRES ENT
JACK S
GES MAY
FRON T
PANE L
VOLTA
R
BE PRES
ENT
S
AT ALL
2
PANE L
3
FRON T
2
ESD
JACK S
GND
HDSL
ESD
GND
GND
H TO
PE AT ER
11908 52L1
ATTAC
GND
EART H
MO TE /RE
11908 51L1
85 1 RE
HD SL
Known Good Remote Line Unit
RPTR
LP1
LP2
IN
HDSL
REPE ATER
E
HRE
C.O. CABL
1L1
PAIR S
124604
Circuit
Frame
PWR
LP1
LP2
LP1
LP2
LBK
HD SL
LP1 LP2
RX
Remote Line Unit Being Tested
TX
HDSL
DS1
HTU -CM
1L2
124600
133
0
266
EXT
DSX-1
LBO
399
533
B8ZS
AMI
we r
FRM
UFRM
SF
CO Po
ESF
EN
NIU LB DIS
EN
LB TIMEOUT
DIS
DSL
TX
M
O
DSX
RX
N
ALM
TX
LBK
Q
E
RX
ING
WARN
POTE NTIAL
LY
S
HAZA RDOU
GES MAY
BE
VOLTA
AT ALL
PRES ENT
JACK S
PANE L
FRON T
ESD
GND
GND
11908 52L1
WARNING
HDSL Cable Pairs
Remote
HDSL Unit
RX
TX
LP2
LP1
DS1
LP1 LP2
RPT R
LP2
IN
OUT
LP1
REM OTE
RPT R TO
CAB LE
REM OTE
PAIR S
CBL PAIR
S
ER
REP EAT
HR E
LE
C.O . CAB
12460 41L1
PAIR S
PWR
LP1
LP2
LP1
LP2
LBK
WAR NING
IALL Y
POT ENT
HAZ ARD
OUS
ES MAY
VOL TAG
SEN T
BE PRE
AT ALL
PAN EL
FRO NT
JAC KS
HDS L
ESD
GND
R
EP EA TE
ATT ACH
TO
GND
EAR TH
M O TE /R
1190 851L
1
85 1 RE
HD SL
TX
RX
LP1
LP2
DS1
LP1 LP2
OUT
TE
REMO
RPTR TO
CABL E
1245026
L1
TE
PAIR S
REMO
S
CBL PAIR
H
LP1
D
S
LP2
L
DS1
ALM
ESF
SF
(GRN)
(YEL)
B8ZS
(GRN)
AMI
(YEL)
LBK
R
L
E
O
M
LBK
C
TX
BRG
WARN
ING
RX
POTE NTIAL
LY
S
HAZA RDOU
GES MAY
VOLTA
BE PRES
ENT
R
S
2
AT ALL
3
FRON T
PANE L
2
JACK S
HDSL
ESD
GND
PE AT ER
ATTAC
H TO
EART H
MO TE /RE
GND
11908 51L1
85 1 RE
Customer
Equipment
or NIU
5
Advertisement
Table of Contents
