Control, Transmission, and Synchronization Interfaces
5-32 Issue 8.0 July 2002
Figure 5-19. Example of a Ring Application with One Node
Provisioned Externally Timed and All Other Nodes
Provisioned Line Timed (Without Timing Drops)
NOTE:
In (Figure 5-19) synchronization messages (DUS and STU) are shown as
they are transmitted on the OC-48 line.
FT-2000
FT-2000
FT-2000
FT-2000
Line Timed
Line Timed
Line Timed
DS3/EC-1/OC-3
IS-3/OC-12
DS3/EC-1/OC-3
IS-3.OC-12
DS3/EC-1/OC-3
IS-3/OC-12
P = TIMING IN PRI to TG3-1
S = TIMING IN SECY to TG3-2
BITS
PS
Externally Timed
Node A
Node B
Node C
Node D
Provisioning Modes:
Node A: External with no Back-up
Node B: Line Timed, Reconfiguration enabled
Node C: Line Timed, Reconfiguration enabled
Node D: Line Timed, Reconfiguration enabled
STU
DUS
DUS
DUS
STU
STU
STU
STU
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