Remote fiber link monitoring in 1830 VWM devices

Overview

Passive WDM devices in remote radio sites cannot communicate with 1830 VWM OSU devices. You can still monitor and detect signal failures using RFLM ports.

RFLM

Perform the following to monitor and detect a signal failure in a passive WDM device:

  1. Transmit an RFLM wave, that is, a 1627 nm signal, from an optical OSC port of an 1830 VWM OSU device to a passive WDM device in the remote radio site.

  2. Loop the signal at the remote end back to the 1830 VWM OSU device. An alarm is generated if a signal path failure is detected.

NFM-P supports the configuration of an 1830 VWM OSU optical OSC port to operate as an RFLM port. The Interface Role parameter of the 1830 VWM OSU optical OSC port participating in the remote fiber link monitoring is set as RFLM after setting the administrative state to down. You can associate a label with the signal by entering relevant information in the RFLM Label text field. When a signal failure occurs, the text appears in the generated alarm and helps in identifying the RFLM alarm.

See To configure an OSC port of an 1830 VWM OSU as a RFLM port for more information about configuring the OSC port as an RFLM port.