aturesOSN 7500
Technical Manual - System Description 8 Protection
Huawei Technologies Proprietary
8-9
NE1
NE2
NE4
NE3
ATM service ATM service
Wor king path
Protection path
Figure 8-8 VP-Ring/VC-Ring protection
The OptiX OSN 7500 provides 1+1 protection for VP/VC. ATM service is protected by
adopting the mode of dual-fed and selective receiving. Two connections (working path
and protection path) are created respectively between the source node NE1 and the
sink node NE3. Normally, the receive end selects the service transmitted over the
working path. When the primary ring fails, the receive end starts protection after
detecting relevant failure information, and switches the received service to the
protection path, thus achieving the protection of ATM service.
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