Nortel Networks OPTera Metro 3500 - Manual (Page 79)

Operation, administration, and maintenance (OAM) features 2-41
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Figure 2-20
RPR over a BLSR and subtending UPSR (example)
BLSR
UPSR
Legend
= BLSR protected line slots
= UPSR protected line slots
= OPE circuit pack
= Resilient packet ring
12
11
11 12
12 11
W
X
W
X
X W
Network Element A
Network
Element B
Network
Element D
Network
Element C
Network
Element E
<East>
<East>
<West>
<West>