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Control, Transmission, and Synchronization Interfaces

Issue 8.0 July 2002

5-37

Figure 5-24. Example of a Ring Application with One Node Provisioned

Externally Timed and All Other Nodes Provisioned Through

Timed or Externally Timed (with Timing Drops)

At least one node should be provisioned externally timed to provide the

timing signal that is distributed to some or all the remaining nodes. The

timing signals used to synchronize the externally timed nodes should be

traceable to a high quality timing source(s). If synchronous low speed

interfaces are present, the timing signals must be traceable to a stratum 1

source. If only asynchronous low speed interfaces are present, the timing

signals must be traceable to a stratum 3 or better source.

FT-2000

Through Timed

FT-2000

BITS

DS3/EC-1/OC-3

BITS

Independent

Clock

BITS

Independent

Clock

Externally Timed

P = TIMING IN PRI to TG3-1

S = TIMING IN SECY to TG3-2

1 = TIMING OUT 1 from TG3-1

2 = TIMING OUT 2 from TG3-2

Lucent Technologies FT-2000 OC-48 User Manual

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