How to check if the transceiver DDMI is within the normal working range.

Zyxel_Chris

To check if a transceiver's Digital Diagnostic Monitoring Interface (DDMI) is within the normal working range, follow these general steps:

1. Access Transceiver Information:
   • SSH to switch and use the command-line interface (CLI) "show interfaces transceiver"
2. Identify DDMI Parameters:
   • Look for DDMI-related parameters in the transceiver information. Common DDMI parameters include:
     • Optical Power (Tx and Rx)
     • Temperature
     • Voltage
     • Bias Current

In this case you can see that the current RX power(dbm) is too low (-40.00), the working threshold range is between -3 to -17.01.

Should check the fiber cable or the peer site of transceiver.