Chapter 28: Ntak20 Clock Controller Daughterboard - Avaya Nortel Communication Server 1000 Reference

Chapter 28: NTAK20 Clock Controller
Contents
This section contains information on the following topics:
Introduction
Physical description
Functional description
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.
Circuit Card Reference
daughterboard
on page 513
on page 515
on page 516
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