Figure 76. Effect Of Switch "B Side" Operation; Figure 77. Effect Of Switch "A Side" Operation - Alcatel 1850 TSS-320 Technical Handbook

A
A
BEFORE
A
A
BEFORE
Figure 78.on page 128 depicts the final effect of Bridge and Switch synchronized steps for traffic
restoration in a network with one fault.
They are carried out via a protocol that uses the K1 and K2 bytes.The failed span is replaced by the
protection traffic of the span not affected by the failure.
The K1 and K2 are exchanged between the Node that are adjacent to the failure, instead the other Nodes
put K1 and K2 in passthrough.
Technical Handbook Common
Functional Description
B
B
protection
working

Figure 76. Effect of SWITCH "B side" operation

B
B
protection
working

Figure 77. Effect of SWITCH "A side" operation

A
A
AFTER
A
A
AFTER
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01
B
B
B
B
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