Performing Line Check (BERT)

Proceed as follows:

•

Using the telephone

Requirements:

•

Internal phone number (not used by any telephone) additionally configured in the PBX at the associated S0 port

Press the Menu key and open the menu diagnosis > ISDN > line test.

Select one of the following options:

internal: Performs the line check over the PBX.

external: Performs the line check over the public exchange.

Important: To test a line over the public exchange, the external line to be tested must be a classic ISDN connection. A line check via analogue, VoIP or NGN lines will result in an error message, which does not mean that these connections are defective.

Only when the option external is selected: Under destination number, enter your own external number, including provider area code, through which the telephone can be reached.

Important: If you must prefix e.g. an exchange line access number when entering/selecting a phone number, depends on the exchange line request (automatic, direct exchange line telephone, internal telephone) that was configured in the PBX (see Advanced Information of the PBX).

Under MSN/name outb. enter the additionally configured internal number and confirm with OK.

Select one of the following options and confirm again with OK.

1 min: The line check (Bit Error Rate Test) is carried out in compliance with ITU-T o.150 and o.151 for one minute.

15 min: The line check (Bit Error Rate Test) is carried out in compliance with ITU-T o.150 and o.151 for 15 minutes.

The line check (BERT) is carried out.

Afterwards, a message is displayed which shows if the line check was successful or if errors were found. The limit of error is 10-6.