Ntbk51Ba Downloadable D-Channel Daughterboard; Install Pri Hardware; Insert/Remove The Ntrb21 Tmdi Card - Nortel Meridian 1 Option 11C Manual

Page 18 of 100 PRI Implementation

NTBK51BA Downloadable D-channel daughterboard

Install PRI hardware

Insert/remove the NTRB21 TMDI card

553-3011-310 Standard 13.00
A minimum of one NTAK93 is required for each PRI link. If more than one
PRI link is connected to the same end location, a single DCHI circuit card can
support up to a maximum of eight PRI connections for the Option 11C
system. This allows a total of 190 B-channels or PRI trunks to be supported
if a backup D-channel is also used. A total of 191 B-channels or PRI trunks
are supported if a backup channel is not used.
The NTBK51BA DDCH daughterboard interfaces with the Option 11C
Central Processing Unit (CPU) and mounts on the NTAK09 DTI/PRI circuit
card for PRI D-channel applications. The DDCH is equivalent to the MSDL
card used on the larger Meridian 1 systems, but it only supports D-channel
applications (no SDI or ESDI).
The NTBK51BA DDCH daughterboard, when installed on the NTAK09
circuit card, is addressed in the same slot as the NTAK09.
A minimum of one NTBK51BA is required for each PRI link. If more than
one PRI link is connected to the same end location, a single DDCH circuit
card can support up to a maximum of eight PRI connections for the Option
11C system. This allows a total of 190 B-channels or PRI trunks to be
supported if a backup D-channel is also used. A total of 191 B-channels or
PRI trunks are supported if a backup channel is not used.
For more information on expansion daughterboards, refer to Option 11C and
11C Mini Technical Reference Guide (553-3011-100).
Insert the NTRB21
Insert the NTRB21 TMDI circuit card into card slot 1-9 in the Main cabinet,
or in slots 11-19, 21-29, 31-39, 41-49 of the first, second, third, and fourth
Expansion cabinets, respectively. Check for available card slots in the base
cabinet and print the configuration record to determine which slots may be
used. To do this, use PRT CFN in LD 22. Then, use the following steps:
January 2002