Nortel Networks OPTera Metro 3500 - Manual (Page 215)

Operation, administration, and maintenance (OAM) features 2-177
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Figure 2-64
Per-site dedicated STS - no VT loss in case of a fiber cut
EX1547p
OM3500
(W/VTX)
OC-3/12/48
UPSR ring
Note 1: There is no VT loss in the event of a fiber cut.
Note 2: For simplicity only one direction is shown.
X
X
X
OK
Fail
OK
Fail
VT#n, STS-1 #1
STS-1 #1 All VTs
STS-1 #2 All VTs
STS-1 #1
Path bridge & select
STS-1 #2
Path bridge & select
VT#n, STS-1 #2
Backbone
Network
OM3500
(W/VTX)
OM3500
(W/STX)