Service and Maintenance > Diagnostic Functions > Performing Line Check (BERT)

Performing Line Check (BERT)
Proceed as follows:
Requirements:
 
1.
Press the Menu key and open the menu diagnosis > ISDN > line test.
2.
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.
3.
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).
4.
Under MSN/name outb. enter the additionally configured internal number and confirm with OK.
5.
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.

COMfortel 1200 - Firmware V2.2 - COMfortel Set V3.16 - Advanced Information V07 02/2019