Protection Function; Ring Network Protection; Fig. 3.7-1 1+1 Protection Of Optical Channel On A Ring Network - Zte Unitrans ZXMP M600 Technical Instructions

ZXMP M600 (V1.0) Technical Manual

3.7 Protection Function

The protection function of the ZXMP M600 supports 1+1 channel protection based on
the ring network.

3.7.1 Ring Network Protection

Ring network protection in the ZXMP M600 indicates channel 1+1 protection. It is
implemented by an OTU with the protection function. The working principle of this
protection in a single node is shown in Fig. 3.7-1.
OTUp+ board is an OTU with the protection function. It provides one interface at the
client and two at the line end.
The switch criteria are the LOS signal of receiving module.
The switch operation is achieved by electrical cross switch chip.

Fig. 3.7-1 1+1 Protection of Optical Channel on a Ring Network

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