Download Install and Connect MCC1 (Multicarrier Cabinets

9 Reset the 120A3A by reseating the DS1 circuit pack.
When you reinsert the DS1 circuit pack after installing a 120A3A CSU the 120A3A
resets. The DS1 circuit pack initializes and tests the 120A3A. When initialization
and testing is complete, the green LED goes off. If the RED indicator is OFF after
the test, the ICSU is working.
10 If the circuits do not pass the self test, troubleshoot the 120A3A as instructed in
Integrated CSU Module Installation and Operation.
H700-383 Cable Pin Assignments provides the H700-383 cable pinouts. H700-383
Cable Lengths by Group Number provides the cable lengths for each cable group
number.
120A3A Channel Service Unit Module
19
18
17
16
15
14
13
12 11 10
09 08 07 06
05
04
03
02 01
AUX
icsupic RBP 032896
Figure Notes:
[1] Rear of carrier containing DS1 circuit pack
[2] 120A3A CSU
[3] 4-pair cord to network interface (H700-383)
[4] DW8A-DE 4-pair cord to alarm contacts (optional)
[5] To 25-pair connector on rear of carrier containing DS1 circuit pack
H700-383 Cable Pin Assignments
Pin
Color
Channel Service
Unit Designation
Network
Designation
Function
1
BK
Line in 0
R1
RCV
2
Y
Line in 1
T1
3
Shield
4
R
Line out 0
R
5
G
Line out 1
T
281
XMT