Nortel Networks OPTera Metro 3500 - Manual (Page 220)

2-182 Operation, administration, and maintenance (OAM) features
OPTera Metro 3500 Multiservice Platform NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Figure 2-68
VT grooming with dedicated STS at each site
EX1555p
OM3500
OM3500
OC-3/12/48
UPSR ring
OC-3/12/48
UPSR ring
Note: For simplicity only one direction is shown.
VT#1,
STS-1 #1
VT#1,
STS-1 #2
OM3500
OM3500
B
A
OC-3/12/48
Linear 1+1
Working fibers Protection fibers
1 x 2 WAY per VT
VT
grooming
VT#1 and VT#2
STS-1 #n
VT#1,
STS-1 #1
VT#1,
STS-1 #2
= OM3500 tributary circuit pack
= Path bridge & select
Legend
Backbone
Network
OM3500
(W/STX)
OM3500 (W/VTX) (collocated
with OM3500 [W/STX])