Configuration Principle

This section describes the principle of configuring the optical line protection.

The principles of configuring the optical line protection are as follows:

• The optical line protection is applied to point-to-point, chain or ring networking.
• During the configuration of the optical line protection, an OLP board must be configured at every station. In addition, the optical power attenuation of the OLP board must be considered in the network design.Note that the OLP board is preferred to be installed in the slot on the right side of the FIU board.
• After passing through different routes, the signals of a same line are received at the same receive end. Hence, during network design, ensure that the performance of the equipment providing the working route and the protection route meets the specification requirements of the system.
• When the power difference between the working and the protection channels exceeds the specific threshold, the system triggers protection switching. Hence, during the network design, ensure that the fiber attenuation values of the working and protection fibers of the OLP board at the receive end are the same. If the values are different, install an optical attenuator with small attenuation on either the working or protection fibers according to the actual network situation.
• The restoration mode of the optical line protection can be set to either Non-Revertive or Revertive.