Specifications

FOMi-E1/T1 Installation & Operation Manual Chapter 4. Troubleshooting & Diagnostics

Diagnostic Tests 4-11

3. Press the CURSOR button to move to the LOC/REM field.

4. Press the SCROLL button to select the local modem or the remote

modem.

5. Press the CURSOR button to move to the Menu Options field.

6. Press the SCROLL button until BERT is displayed.

7. Press the CURSOR button to move to the Parameters field.

8. Use the SCROLL button to toggle to ON.

9. To start the LLB test, press the ENTER button.

The message WAIT... is displayed on the local modem LCD, and then an

asterisk appears next to the ON indication.

10. To start the BERT test, when the parameters field is set to ON press

ENTER.

The message WAIT... is displayed on the local modem LCD and then an

asterisk appears next to the ON indication. The ERR LED will blink

whenever an error is detected and the BER will be displayed on the LCD

of both modems.

11. After completion of the test (or when the fault has been corrected),

deactivate the loopback test.

12. To stop the test, press the SCROLL button until OFF is displayed and

then press the ENTER button.

The message WAIT... is displayed on the local modem LCD and the test

is terminated.

Remote Digital

Loopback + BERT

The Remote Digital Loopback + BER Test (RLB +BERT) determines the

performance of both the local and the remote FOMi-E1/T1 units, as well as

their connecting lines. Using an external BER tester, it measures bit error rate

through the link.

Figure 4-9 describes the data flow for the operation of the external BER

tester.

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To activate a BER test:

1. Press the CURSOR button to move to the Menu Type field.