OPM Test Mode

GPON/XGS/EPON PON Diagram

Network diagram of the GPON network. Connect the FX120/FX120 Lite between the splitter and ONT/ONU.

Do NOT connect the FX120/FX120 Lite between the OLT and splitter.

 

The FX120/FX120 Lite should be connected between the splitter and ONT.

 

GPON Summary Screen

 

XGS-PON Summary Screen

 

EPON Summary Screen

 

10G EPON Summary Screen

 

GPON/EPON LED Status Indicators

On screen LED colors indicate the status of upstream (Up) and downstream (Dn) signals and frame/error detection.

GPON/XG(S)-PON Upstream/Downstream LED Status

 

EPON/10G EPON Upstream/Downstream LED Status

 

  • Green: Signal level detected. No errors or alarms are present. No further action required.

  • Red : An error condition is detected and is currently present. Flashing red indicates a history condition—an error was detected during the measurement interval but it is no longer present or active. Tap TOOLS to view PLOAM, and Active ONU.

The History button resets the LEDs of past statuses.

If any LED remains red, clean the patch cord connectors that will connect the FX120/FX120 Lite to the ONU/ONT, the FX120/FX120 Lite test ports (To ONU, To OLT), and the ONU/ONT ports. Refer to Inspection for information on inspecting and cleaning fiber connectors.

 

OLT and ONT/ONU Messages and Measurements

 

OLT Information Table

 

EPON OLT Information Table

 

Below the OLT and splitter diagram block, a table displays the transmitting signal level (TX), PON ID, PON Type, and ODN class. For EPON testing, the MAC number is displayed. This is decoded from downstream PLOAM messages from the OLT. This information is only available when sent by the OLT and may need to be enabled.

 

GPON/XGSPON ONU Information Table

 

EPON/10G EPON ONU Information Table

 

GPON/XGSPON ONU ID, ONU S/N information and EPON ONU LLID, ONU MAC information is decoded from downstream PLOAM messages from the OLT that was received from the ONT/ONU during the first service activation. If the information is not displayed, it may have been missed. Power cycle the ONU to initiate the ranging process again.

 

ONU Status

 

See ONU/ONT Statuses for more information.

 

 

 

GPON Signal Measurement Table

 

XGS-PON Signal Measurement Table

 

EPON Signal Measurement Table

 

At any customer location after the OLT and splitter, the FX120/FX120 Lite will display 1490nm and 1310nm signal level values for GPON, 1577nm and 1270nm for XGS-PON, and 1550nm for RF/CATV. ODN Loss is the difference between the transmitting signal from the OLT (TX) and the DS signal level measured at the FX120/FX120 Lite location.

If the OLT is not broadcasting its output power, the span loss value cannot be calculated.

 

Green, yellow, and red table colors indicate whether signal levels pass or fail against ITU-T/IEEE standard threshold values configured in Setup.

Refer to OPM Setup for information on test profile setup.

 Green: The measured signal is above the critical threshold.

 Yellow: The measured signal is below marginal and above critical.

 Red: The measured signal level is below the critical threshold and does not meet the specification.

 

Upstream/Downstream/TC-Sync Signal Status

See Signal and Synchronization Status for information on TC-Sync statuses.

 

Test and Profile Settings

  • Setup: Setup Test profile

  • Advanced: Leads to the Advanced Setup, Results, PLOAM and OMCI Decoder, and Active list.

 

Signal and Synchronization Status

The Status table displays detected 1490nm/1577nm downstream, 1310nm/1270nm upstream, and TC-Sync status.

 

GPON Signal and Synchronization Status Table

 

XGS-PON Signal and Synchronization Status Table

 

10G EPON Signal and Synchronization Status Table

 

Status Table

  • 1490nm/1310nm: If OK is displayed, light in the downstream 1490nm or upstream 1310nm direction is detected.

  • 1577nm/1270nm: If OK is displayed, light in the downstream 1577nm or upstream 1270nm direction is detected.

  • 1577nm/1270nm/1310nm: If OK is displayed, light in the downstream 1577nm or upstream 1270nm direction or upstream 1310nm is detected.

  • Transmission Connectivity Sync (TC-Sync): OK UL/DL indicates that the FX120 is properly synchronized with the OLT and ONU/ONT traffic. No UL/DL indicates the OLT and ONU/ONT are not synchronized properly. Consult VeEX technical support if unable to achieve TC-Sync.

OK indicates US or DS light is detected, but does not indicate whether ITU-T Threshold values (IEEE values for EPON) are met or if the OLT and ONU/ONT are properly synchronized.