Figure 63. Typical Ring Network With Sncp - Alcatel 1850 TSS-320 Technical Handbook

Cable break-down concerns all the fibers it contains hence it places traffic in both directions out-of-
service, while a failure concerns only one fiber.
The units are provided with a path switching circuit (bridge + switch).
Its enabling depends on the equipment configuration.
With SNCP each working path has a dedicated protection path.
2
BRIDGE
T1
SWITCH
1
T2
NOTES:
On Craft Terminal, the following terminology is used:
Pass-Through= Bidirectional Connection
Drop/Ins Prot.= Bidirectonal Protected Connection
Technical Handbook Common
Functional Description
Side B
T1, T2 Pass-through
Side A
T2 Pass-through
T1 Drop/Ins Prot.
Side B
CLOCKWISE
Side A
T1 Pass-through
T2 Drop/Ins Prot.
Side B

Figure 63. Typical ring network with SNCP

3
Side A
Side B
T1 Pass-through
T2 Drop/Ins Prot.
Side A
COUNTER
CLOCKWISE
Side B
T2 Pass-through
T1 Drop/Ins Prot.
Side A
Alcatel 1850 TSS-320 Rel. 1.1
8DG 07734 AAAA Edition 01
4
T2
5
T1
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