Nortel Networks 1000 User Manual
Page 803
803
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NTAK20 Clock Controller
daughterboard
Contents
This section contains information on the following topics:
“Physical description” (page 809)
“Functional description” (page 810)
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 Media Gateway 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
Note:
The card is restricted to slots 1 through 3 in EMC- type cabinets
(such as NAK11Dx and NTAK11Fx cabinets). It does not work in slots 4
through 10 in these cabinets.
The NTAK20 clock controller card supports 1.5 Mb, 2.0 Mb, and 2.56 Mb
clock recovery rates.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
02.06
Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.