Nortel Networks Circuit Card - Manual (Page 735)

Page 735 of 906
Circuit Card Description and Installation
744
NTAK20 Clock Controller daughterboard
Contents
This section contains information on the following topics:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 735
Physical description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 738
Functional description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 739
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