Page 148 of 188 NTD12 Dual-port DTI/PRI card description and installation
553-2901-200 Standard 11.00 August 1996
Removing the NT5D12 DDP
CAUTION
The static discharge bracelet located inside the cabinet must be worn before handling circuit
cards. Failure to wear the bracelet can result in damage to the circuit cards.
Procedure 21 - Removing the NT5D12 DDP
Step
Action
1
Determine the cabinet and shelf location of the DDP card to be
removed.
2
Disable Network Loop using Overlay 60. The command is DISL “loop
number.”
The associated DCHI may have to be disabled first. The faceplate
switch S1 should not be disabled until both PRI loops are disabled first.
3
If the DDP card is being completely removed, not replaced, remove
data from memory. See the ISDN PRI Description and Administration
NTP(553-2901-100).
4
Remove cross connections at MDF to wall-mounted cross-connect
terminal.
5
Tag and disconnect cables from card.
6
Rearrange Clock Controller cables if required.
CAUTION
Clock Controller cables connecting the Clock Controller and DDP card must NOT be routed
through the center of the cabinet past the power harness. Instead they should be routed around the
outside of the equipment shelves.
7
If the other circuit of a DDP card is in use, DO NOT remove the card.
8
Remove the DDP card only if both loops are disabled. Switch S1
(faceplate switch) must be in the OFF (DIS) position before the card is
removed.
9
Pack and store the DDP card and circuit card.
