Technical Description
10088
Tx
Rx
Tx
Rx
Protected VC
Unprotected VCUnprotected VC
Protected VC
1+1 VC SNCP group1+1 VC SNCP group
Link or
sub-network
Figure 43 1+1 VC SNCP principle
Performance data is collected and fault management is provided for
unprotected as well as protected VC4, VC3 or VC12 interfaces (that is the
1+1 VC SNCP group). This gives accurate information on the availability of
network connections.
3.10.2.3 Ring Protection
6628
Ring
Tree
Star
Figure 44 Network topologies
The 1+1 SNCP mechanism described in the previous section can be used to
create protected ring structures in the microwave network. In a ring topology, all
nodes are connected so that two nodes always have two paths between them.
A connection entering a ring at one point and exiting at another point can
therefore be protected with a 1+1 SNCP group configured at each end of the
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