Nortel Networks 3500, NTRN10AN manual Per-site dedicated STS no VT loss in case of a fiber cut

Operation, administration, and maintenance (OAM) features 2-177

Figure 2-64

Per-site dedicated STS - no VT loss in case of a fiber cut

EX1547p

VT#n, STS-1 #1

OM3500

(W/VTX)

X	OC-3/12/48
	UPSR ring

OM3500

(W/VTX)

VT#n, STS-1 #2

OM3500

(W/STX)

All VTs STS-1 #1

OK

X Fail

STS-1 #1

Path bridge & select

STS-1 #2

Path bridge & select

X Fail

OK

All VTs STS-1 #2

Backbone

Network

Note 1: There is no VT loss in the event of a fiber cut.

Note 2: For simplicity only one direction is shown.

Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004