968 NTBK50 2.0 Mb PRI card
daughterboard provides identical performance to the on-board NTAK79
DCHI. The NTBK51 DDCH daughterboard provides support for protocols
based on the MSDL platform.
The NTBK50 2.0 Mb PRI card provides a 2 Mb PRI interface for the CS
1000. The NTBK50 card sups the NTAK20 clock controller daughterboard
and either the NTAK93D-channel interface or the NTBK51 Downloadable
D-channel handler. The NTAK93 DCHI daughterboard provides identical
performance to the on-board NTAK79 DCHI. The NTBK51 DDCH
daughterboard provides support for protocols based on the MSDL platform.
The NTBK50 is installed only in the Media Gateway. Itis not suppor ted in
the Media Gateway Expansion. Up to four digital trunk cards are supported
in each Media Gateway. The NTBK50 card can be installed in slots 1, 2, 3,
and 4 of the Media Gateway.
ATTENTION
IMPORTANT!
Each Media Gatewaythat has a digital trunk must clock the clock controller to
an external reference clock.
Note: Clocking slips can occur between systems that are clocked from
different COs, if the COsare not synchronized. The slips can degrade
voice quality.
Physical description
The NTBK50 uses a standard 9.5" by 12.5" multi-layer printed circuit board.
The faceplate is 7/8" wide and contains seven LEDs. See Figure 280
"NTBK50 2.0 Mb PRI card with daughterboards" (page 969).
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 01.04 Standard
Release 5.0 23 May 2008
Copyright© 2003-2008, Nor tel Networks
.