Nortel Networks OPTera Metro 3500 - Manual (Page 221)

Operation, administration, and maintenance (OAM) features 2-183
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Figure 2-69
VT grooming with shared VT-managed STS
EX1557p
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#2,
STS-1 #1
A
B
4 x 1 WAYPR per VT
VT grooming
UPSR, 2 way
(unprotected)
VT#1 and VT#2,
STS-1 #n
OM3500
(W/STX)
Electrical
termination
DS1
DS3
EC1
= OM3500 tributary circuit pack
= Path bridge & select
Hairpin connection
STS-1 #1
Legend
Backbone
Network
OM3500 (W/VTX)
(collocated with
OM3500 [W/STX])