Physical description – Nortel Networks 1000 User Manual
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824
NTAK79 2.0 Mb PRI card
The NTAK79, which can be located in the main and IP expansion cabinets,
provides a 2.0 Mb PRI interface and an onboard D-channel handler (DCH)
for the Option 11C system. This circuit card also includes onboard circuitry
equivalent to the NTAK20 Clock Controller that can be manually switched
in or out of service.
The NTAK79 2 MB Primary Rate Interface (PRI) card provides a 2.0
Mb interface and an onboard D-channel handler (DCH) for the CS 1000
system. The NTAK79 card also includes an onboard clock controller
(equivalent to the NTAK20 Clock Controller) that can be manually switched
into or out of service.
The NTAK79 card does not support the NTBK51 downloadable D-channel
handler daughterboard.
The NTAK79 card is installed only in the Media Gateway. It is not
supported in the Media Gateway Expansion. Up to three four trunk cards
are supported in each Media Gateway. The NTAK79 card can be installed
in slots 1, 2, 3, and 4 of the Media Gateway.
ATTENTION
IMPORTANT!
Each Media Gateway that has a digital trunk must have a clock controller
clocked to an external reference clock.
Note:
Clocking slips can occur between systems that are clocked from
different COs, if the COs are not synchronized. The slips can degrade
voice quality.
Physical description
The NTAK79 uses a standard 9.5" by 12.5" multi-layer printed circuit
board. The faceplate is 7/8" wide. The NTAK79 circuit card has a total of
seven faceplate LEDs. Five of the LEDs are directly associated with the
operation of the Primary Rate interface (PRI). The remaining two LEDs are
associated with the on-board Clock Controller and the on-board D-channel
interface (DCHI). The LEDs are described in
.
Table 341
NTAK79 LEDs
LED
State
Definition
On (Red)
The NTAK79 2 MB PRI circuit card is disabled or
out-of-service.
OOS
Off
The NTAK79 2 MB PRI is not in a disabled state.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
02.06
Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.