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DEFINITY Enterprise Communications Server Release 8.2
Upgrades and Additions for R8r
555-233-115
Issue 1
April 2000
Adding or Removing Cabinet Hardware
6-143Installing an Integrated Channel Service Unit (ICSU) Module
6
Figure 6-56. 120A Channel Service Unit Module
!
CAUTION:
Do not plug the 120A into any circuit pack other than a TN474F or TN777E
or later release/vintage. Do not connect the 120A to any interface other than
a network smart jack.
Be sure the DS1 circuit pack is set for 24-channel operation (1.544 Mbps).
The 120A does not operate with the 32-channel interface. A switch on the
circuit pack or administration sets this option.
!
CAUTION:
Always wear an anti-static wrist strap when installing a 120A module. Do
not touch the external alarm cable when it is connected to the 120A. Static
discharge can damage connector terminals and relays.
1. Unplug the DS1 circuit pack from its slot.
2. Install a 4C retainer in the 50-pin plug associated with the DS1 circuit pack
slot.
3. Plug the 120A’s 25-pair connector directly into the plug associated with
the DS1 circuit pack slot.
1. Rear of carrier containing DS1 circuit pack
2. 120A CSU
3. 4-pair cord to network interface (H600-383)
4. DW8A-DE 4-pair cord to alarm contacts (optional)
5. To 25-pair connector on rear of carrier containing
DS1 circuit pack
16171819 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 AUX
icsupic RBP 032896