Nortel Networks 553-3001-211 manual NTRB21 DTI/PRI/DCH Tmdi card, Contents

826

Page 813 of 894

NTRB21 DTI/PRI/DCH TMDI card

Contents

This section contains information on the following topics:

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 813

Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 814

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 818

Software description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819

Hardware description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819

Architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 819

Introduction

The NTRB21 (DTI/PRI/DCH) TMDI digital trunk card is a 1.5 Mb DTI or

PRI interface to the CS 1000S, CS 1000M Cabinet, and Meridian 1 PBX 11C

Cabinet. The NTRB21 card has a built-in downloadable D-channel.

The TMDI feature supports the software changes required for CS 1000S, CS 1000M Cabinet, and Meridian 1 PBX 11C Cabinet to use the new TDMI pack. The software changes include:

•a new prompt to replace a function that was handled by a dip switch on the NTAK09

•an extra loadware application to handle Layer 1

•a change to the existing loadware files into 32 bit format from the original 16 bit format

Circuit Card Description and Installation