Page 150 of 188 NTD12 Dual-port DTI/PRI card description and installation
553-2901-200 Standard 11.00 August 1996
DDCH installation for all systems
Installation note
Before beginning an installation, do the following:
— Consult the Spares Planning Guide (553-3001-153) document and
follow the instructions.
— Bring spares of all cables and boards.
— Remember that test procedures require a 24-hour minimum bit error-rate
testing before being used. See the ISDN PRI Description and
Administration (553-2901-100) document for these test procedures.
— The MSDL/DCHI (if needed) or the DDP cards may be installed first.
However, DDP loops must be configured in software before defining
DCH links.
