Description 163

Figure 62

Example 3, Clocking Hierarchy referenced to a Public Network Master Clock

This is an example of a "STAR" arrangement— one Hub PBX is linked to the Central Office and all other PBXs are connected as slaves. When a second Digital loop from the system which forms the hub of this network becomes available, it can be used as a Secondary Clock Source in case the Primary Source fails.

Nortel Communication Server 1000

ISDN Primary Rate Interface Installation and Commissioning

NN43001-301 02.03 Standard

Release 5.5 7 December 2007

Copyright © 2003-2007, Nortel Networks

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Nortel Networks NN43001-301 manual Description