Page 152 of 188 NTD12 Dual-port DTI/PRI card description and installation
553-2901-200 Standard 11.00 August 1996
DDCH removal for all systems
Removing the DDCH daughterboard
Removal instructions for the DDCH (NTBK51AA) card are the same for
Meridian 1 Options 21/21E, 51/51C, 61/61C, 71, and 81/81C, and Meridian
SL-1 STE, RT, XT, and NT systems.
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 23 - Removing the DDCH card
Step
Action
1
The DDCH can only be removed when it is disabled in software.
2
Both ports of the associated DDP card must be disabled.
3
Disable the faceplate switch on the DDP.
4
Remove the DDP and DDCH.