Chapter 33: Ntbk50 2.0 Mb Pri Card - Avaya Nortel Communication Server 1000 Reference

Chapter 33: NTBK50 2.0 Mb PRI card

Contents
This section contains information on the following topics:
Introduction
Physical description
Functional description
Architecture
Introduction
The NTBK50 2.0 Mb PRI card provides a 2.0 Mb PRI interface. It supports the NTAK20 clock
controller daughterboard and either the NTAK93 D-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.
You can install this card in slots 1 through 4 in the Media Gateway. The card is not supported
in the Media Gateway Expansion.
Important:
Each Media Gateway that 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 Central Offices
(COs), if the COs are not synchronized. The slips can degrade voice quality.
Circuit Card Reference
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