EPON/10G-EPON Testing

EPON testing uses Ethernet packets instead of the ATM cells that GPON uses. Additionally, EPON testing follows IEEE standards.

Testing EPON networks is similar to testing GPON/XG(S)-PON networks. The FX120/FX120 Lite should be inserted at the customer premises between between the ONU/ONT and the last splitter in the ODN.

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

 

EPON/10G-EPON Key Features

  • Low loss, pass-through mode for ONT/ONU verification

  • Measures 1490/1577 downstream & 1310/1270 upstream

  • Displays MAC address from OLT

  • Displays ONU LLID, ONU MAC, and ONU Status

  • Time stamped histogram function for level monitoring

  • Low reflectance, SC/APC Interfaces for ONU/OLT test ports

  • TC-Sync per IEEE

  • Pre-defined Thresholds or User defined

 

EPON/10G-EPON Test Procedure

  1. Power on the FX120/FX120 Lite test set. The unit connects to any network it finds, recognizes the type of network and performs tests using built-in thresholds that follow IEEE protocols and standards. Starting/stopping/restarting measurements from the OPM menu (see OLT Information Table) starts/stops/resets items in the OPM Summary screen - the power level graphs and the Active ONU list in Advanced Mode. To clear the PLOAM list, go to the respective PLOAM menu and press the clear button.

  2. Tap on Setup and configure the test profile settings according to EPON IEEE Test standards.

    EPON Setup menu

  3. Inspect and clean the FX120/FX120 Lite test ports. Inspect and clean the fiber patch cord from the OLT and insert it into the FX120/FX120 Lite OLT test port.

Warning: Never look directly into the beam of an active optical source as this may result in harmful eye damage from radiation exposure.

 

  1. If 1490/1577nm light is detected, the 1490/1577nm Status will display OK. Verify that the measured 1490/1577nm signal level is green (see OPM Test Mode).

    EPON Summary Screen

     

    10G EPON Symmetric Summary Screen

  2. All DS LEDs should turn from red to Green. If any LED remains red, clean and inspect the connectors again as specified in Step 4 (see GPON/EPON LED Status Indicators).

    EPON/10G EPON Upstream/Downstream LED Status

  3. Inspect and clean the patch cord connectors that will connect FX120/FX120 Lite to ONU/ONT and the ONU/ONT test port.

  4. Connect the FX120/FX120 Lite to the ONU/ONT test port. If 1310/1270nm light is detected, the Status will display OK. Verify that the measured 1310/1270nm signal level is green (see OPM Test Mode).

     

    10G EPON Asymmetric Summary Screen

     

  5. All US LEDs should turn from red to green. If any LED remains red, clean the ONU connections again as outlined in Step 6.

  6. Confirm TC-Sync status displays DL. If you are not able to achieve TC-Sync, contact VeEX Inc. Support.

 

Synchronizing the FX120/FX120 Lite with the ONU Activation Process

 

The FX120/FX120 Lite will synchronize to the downstream frame (from the OLT) provided the OLT is operational and 1490/1577nm signal level is good. The downstream frame synchronization indicator should occur almost immediately.

In order to synchronize with the ONU, the FX120/FX120 Lite needs to see the ONU registration process. Therefore, only connect the ONU AFTER the FX120/FX120 Lite application is already running. Otherwise, unplug and replug the ONU the ONU after the FX120/FX120 Lite application is running if the ONU is already connected to the FX120/FX120 Lite.

If the OLT and an active ONU are connected to the FX120/FX120 Lite before starting the test application, the FX120/FX120 Lite will not see the ONU activation and the above process will not be completed. In this instance, LOF will be reported for the upstream side; no ONU ID or ONU S/N information on the OPM results page will be displayed.

 

 

EPON Thresholds

    PX10 PX20 PR10 PR20 PR30
ONU Site Upstream ONT TX -1 to -1 to +3 to +8 +3 to +8 +4 to +9
ONT Site Downstream ONT RX -24 to -27 to -27 to -8 -27 to -8 -28 to -9