Display of alarms for coherent optical transceivers

Alarms are raised when the optical transceiver malfunctions.

• TX loss of alignment - indicates loss of signal alignment on the transmitter.

• TX out of alignment - indicates that the signal on the transmitter (TX) is out of alignment.

• TX CMU loss of lock - indicates that the transmitter (TX) has lost connection (locked) with the external clock (clock monitor unit).

• TX reference clock loss of lock - indicates that the transmitter (TX) has lost connection (locked) with the reference clock.

• TX deskew loss of lock - for traffic flow in the TX direction, this alarm indicates that the end receiver cannot align the physical lanes using alignment marker.

• TX FIFO error - indicates signal FIFO error on the transmitter.

• RX demodulator loss of lock - indicates that the media demodultor cannot achieve lock.

• RX CDC loss of lock - indicates that the receiver (RX) has lost connection (locked) with the external clock.

• RX loss of alignment - indicates that the signal alignment on the receiver (RX) is lost.

Continue with these items:

• RX out of alignment - indicates that the signal on the receiver (RX) is out of alignment.

• RX deskew loss of lock - for traffic flow in the RX direction, this alarm indicates that the end receiver cannot align the physical lanes using alignment marker.

• RX FIFO error - indicates signal FIFO error on the receiver.

• RX FEC excessive degrade - indicates that the signal has reached or exceeded FED threshold.

• RX FEC detected degrade - indicates that the signal has reached or exceeded FDD threshold.

• Remote degrade - indicates remote signal degradation.

• Local degrade - indicates local signal degradation.

• Remote Phy fault - indicates remote signal fault (RPF).