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Cisco ONS 15454 DWDM Reference Manual, R8.5
78-18343-02
Chapter 8 Transponder and Muxponder Cards
8.7.11 SONET/SDH Overhead Byte Processing
8.7.11 SONET/SDH Overhead Byte Processing
The card passes the incoming SONET/SDH data stream and its overhead bytes for the client signal
transparently. The card can be provisioned to terminate regenerator section overhead. This is used to
eliminate forwarding of unneeded layer overhead. It can help reduce the number of alarms and help
isolate faults in the network.
8.7.12 Client Interface Monitoring
The following parameters are monitored on the MXP_2.5G_10E card:
• Laser bias current is measured as a PM parameter
• LOS is detected and signaled
• Transmit (TX) and receive (RX) power are monitored
The following parameters are monitored in real time mode (one second):
• Optical power transmitted (client)
• Optical power received (client)
In case of loss of communication (LOC) at the DWDM receiver or far-end LOS, the client interface
behavior is configurable. AIS can be invoked or the client signal can be squelched.
8.7.13 Wavelength Identification
The card uses trunk lasers that are wave-locked, which allows the trunk transmitter to operate on the ITU
grid effectively. Table 8-15 describes the required trunk transmit laser wavelengths. The laser is tunable
over eight wavelengths at 50-GHz spacing or four at 100-GHz spacing.
Table 8-15 MXP_2.5G_10E Trunk Wavelengths
Band Wavelength (nm)
30.3 1530.33
30.3 1531.12
30.3 1531.90
30.3 1532.68
34.2 1534.25
34.2 1535.04
34.2 1535.82
34.2 1536.61
38.1 1538.19
38.1 1538.98
38.1 1539.77
38.1 1540.56
42.1 1542.14
42.1 1542.94
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