FRITZ!Box 6490 Cable Service - Knowledge Base

FRITZ!Box 6490 Cable Service

Telephone does not ring when configuring it in user interface

When you configure a telephone under "Telephony > Telephony Devices > Configure New Device" in the user interface, during the procedure the FRITZ!Box checks whether the telephone is correctly connected. After you select the port the telephone is connected to, the question "Is the telephone ringing?" appears. However, the telephone does not ring and you cannot continue with the configuration.

Simply proceed as described below. After each measure, check whether the problem persists.

1 Ring test does not work with ISDN telephones

Due to an error in the current FRITZ!OS, the wizard's ring test does not work with ISDN telephones. Therefore, when you are asked "Is the telephone ringing?", select "Yes" even if the telephone does not ring. After setup, you can use the phone without restriction.

We are working on a solution and shall correct this behavior with a FRITZ!OS update for the FRITZ!Box as soon as possible. We cannot give you a release date for the update yet.

If you are leasing your FRITZ!Box from your cable provider, then your cable provider will make the FRITZ!OS update available, and not AVM. It will be installed automatically. In this case, refer to your cable provider for possible release dates for the update.

2 Connecting the telephone directly to the FRITZ!Box

The following steps are only necessary if the telephone is connected to a PBX that is connected to the FRITZ!Box:

  1. Disconnect the telephone from the PBX and connect it directly to the FRITZ!Box.

If the telephone now rings, then the PBX is incorrectly configured. Refer to the manufacturer for instructions on configuring the PBX.

3 Testing a different telephone

  1. Disconnect the telephone from the FRITZ!Box and connect a different telephone to the same port.

    Important:The ISDN telephones you connect to the FRITZ!Box must be suitable for use with ISDN point-to-point connections. Furthermore, the cables of ISDN telephones may not exceed 10 m. ISDN point-to-multipoint lines are common in the private sector and in small offices, whereas ISDN point-to-point connections tend to be used in professional environments.

    • If the second telephone rings, then the first telephone or its cable is defective.