Nortel Networks OPTera Metro 3500 - Manual (Page 197)

Operation, administration, and maintenance (OAM) features 2-159
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Figure 2-50
Synchronization flow detail in an OPTera Metro 3500 network (example)
EX1292
Legend
= Optical interface
ST3
Synchronization
stream
Tx Rx
Tx Rx
Tx Rx
Tx Rx
Tx
Rx Tx
Rx
Tx Rx
Tx Rx
Tx Rx
Tx Rx
X
Y
X
Y
X Y
X
Y
X
Y
ST3
ST3
ST3
DUS
ST3
Synchronization
boundary
Head end
Line
Line Line
Line
Line
DUS
(Active)
Tx
Rx Tx
Rx
Y X
ST3
(Active)
Synchronization
stream
DUS
ST3