Use this procedure to view the Digital Diagnostics Monitoring (DDM) monitoring parameters for optical pluggable transmission modules.

Digital Diagnostic Monitoring is implemented on all optical TDM and Ethernet pluggable transmission modules on the VLNC35 and VLNC5x circuit packs.

Important!

Electrical pluggable transmission modules do not support Digital Diagnostics Monitoring.

You must log in as a Privileged, General, Maintenance or Reports Only user to view Digital Diagnostic Monitoring parameters.

DDM monitoring parameters

The following DDM monitoring parameters are supported.

• Laser Bias Current (milliamperes)

  • Range is 0.0 to 131.0.

  • Accuracy is at least ±10% of nominal value.

  • If socket is in AUTO state, then - is displayed.

  • If socket is currently empty, then ? is displayed.

• Optical Power - Receive (dBm)

  • Range is −40.0 to +8.2, or LOS.

  • Accuracy is ±3 dB.

  • If socket is in AUTO state, then - is displayed.

  • If socket is currently empty, then ? is displayed.

• Optical Power - Transmit (dBm)

  • OMA for Optical Modulation Amplitude

  • AVG for average power

  • If socket is in AUTO state, then - is displayed.

  • If socket is currently empty, then ? is displayed.

  • If DDM is not supported on the PTM, then NA is displayed.

• Temperature (Celsius)

  • SFP: Range is −128°C to +128°C.

  • Accuracy is ±3°.

  • If socket is in AUTO state, then - is displayed.

  • If socket is currently empty, then ? is displayed.

• Calibration (interpretation of the DDM data)

  • INTERNAL

  • EXTERNAL

• Power Supply Voltage (Volts)

  • Range is 0 to +6.55 Volts.

  • Accuracy is ±3%.

  • If the specified monitored type baselined value has not been established, then NA is displayed

Prior to performing this procedure, refer to Before you begin and Required equipment in this chapter.