Control, Transmission, and Synchronization Interfaces
5-36 Issue 8.0 July 2002
â– One node provisioned externally timed; all other nodes provisioned
through timed or externally timed: In this configuration (Figure 5-23 and
Figure 5-24), at least one node should be provisioned externally timed
(phase locked in releases prior to Release 5), and any nodes that drop
timing signals should be provisioned through timed. All other nodes should
be provisioned externally timed or through timed.
Figure 5-23. Example of a Ring Application with One Node Provisioned
Externally Timed and All Other Nodes Provisioned
Through Timed (with Timing Drops)
FT-2000
Through Timed
Through Timed
FT-2000
FT-2000
FT-2000
PBX or
Clock
DS3/EC-1/OC-3
DS3/EC-1/OC-3
DS3/EC-1/OC-3
DS3/EC-1/OC-3
Through Timed
BITS
Independent
Clock
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
2
1
SP
1
BITS
Externally Timed
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