Cisco Model GS7000 4-Port Node 1 GHz with 42 54 Split Installation Guide

 

4024769 Rev A 

35

 

If the STATUS LED is flashing fast, one or both of the secondary receivers is being 
turned on, i.e., redundancy is in use. 

Complete the following steps to verify that the redundancy switching is correct in 
1x/2x Fwd Seg forward segmentation mode. 
1  Connect the Model 91200 Handheld Programming Terminal to the local control 

port on the LCM.  Refer to Configuring the LCM Using the Model 91200 
Handheld Programming Terminal for instructions. 

2  Use menu item 5 - Node Setting, sub-menus 5.1 - AB Switch 1 and 5.2 AB 

Switch 2, to check the settings of the AB switches (Preferred A, Preferred B, 
Forced A, or Forced B).  If not set correctly, reset as required. 

3  Use menu item 6 - Rx & Tx Power to check the optical power levels of the 

receivers against their set thresholds in menu item 3 - RX Thresholds.  This 
allows you to see which primary receivers have failed and had their 
corresponding secondary receivers turned on.  Use menu item 0 - RX Status to 
verify the status of the corresponding receivers. 

 

If the STATUS LED is on (solid RED), redundancy has failed.  One or both of the 
secondary receivers could not be turned on and operated when their corresponding 
primary receiver failed. 

To troubleshoot this condition, use the same procedure as in Red STATUS LED 
Flashing Fast, but look for the failure of both primary and secondary receivers. 

 

  

WARNING: 
Be sure that your node supports the forward segmentation of your status 

monitor.