Nortel Networks 553-3001-211 manual NTAK20 Clock Controller daughterboard

732

Page 723 of 894

NTAK20 Clock Controller daughterboard

Contents

This section contains information on the following topics:

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 723

Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 726

Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 727

Introduction

Digital trunking requires synchronized clocking so that a shift in one clock source results in an equivalent shift in all parts of the network. Synchronization is accomplished with an NTAK20 clock controller daughterboard in each MG 1000S that contains a digital trunk card.

The NTAK20 clock controller daughterboard mounts directly on the following cards:

•NTAK09 1.5Mb DTI/PRI

•NTBK50 2.0 Mb PRI

•NTRB21 DTI/PRI/DCH TMDI

•NTBK22 MISP

•NT6D70 SILC

•NT6D71 UILC

Circuit Card Description and Installation