Lucent Technologies FiberReach DDM-2000 - Free Running;Line Timing Synchronization in a

363-206-305
Transmission and Synchronization
5-8
Issue 3 June 2000
Figure 5-3 shows a DDM-2000 FiberReach Multiplexer ring application. The
intermediate nodes in this subnetwork perform line timing, whereby both
transmitted OC-N lines are timed from an incoming OC-N. In the ring topology,
synchronization messaging allows automatic synchronization reconfiguration in
the event of a fiber or equipment failure. In this figure, the host DDM-2000 OC-3
Multiplexer or
SLC
-2000 ARM shelf is free-running, and the DDM-2000
FiberReach wideband shelves are line-timed.
Figure 5-3. Free Running/Line Timing Synchronization in a Ring Configuration
TGS
OLIU
DDM-2000
FiberReach
OLIU
DDM-2000
FiberReach
OLIU
DDM-2000
FiberReach
Free Running
Line TimedLine Timed
Line Timed
DDM-2000 OC-3
or
SLC®-2000 ARM Shelf
tpa 843626/01