FRITZ!Box 7490 Service - Knowledge Base
Telephone does not ring when configuring it in the user interface
When you configure a telephone under "Telephony > Telephony Devices > Configure New Device" in the user interface, the FRITZ!Box checks whether the telephone is connected properly. After you select how the telephone is connected, the question "Is the telephone ringing?" is displayed. 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 is solved.
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.
Note:You can have the push service notify you by email when new updates are available. In addition, you can configure the FRITZ!Box so that new updates are installed automatically. You can enable these options under "System > Push Service" or "System > Update > Auto Update" in the user interface.
2 Connecting the telephone directly to the FRITZ!Box
The following steps are only necessary if the telephone is connected to a PBX (telephone system) that is connected to the FRITZ!Box:
- Disconnect the telephone from the PBX and connect it directly to the FRITZ!Box.
If the telephone rings now, the PBX is incorrectly configured. Information on how to configure the PBX can be obtained from the manufacturer.
3 Testing a different telephone
- Disconnect the telephone from the FRITZ!Box and connect a different telephone to the same socket.
Important:The ISDN telephones you connect to the FRITZ!Box must be suitable for use with ISDN point-to-point connections. In addition, the cables of ISDN telephones may not exceed 10 m in length. ISDN point-to-multipoint lines are common in the private sector and in small offices, while ISDN point-to-point connections are more commonly used in professional environments.
- If the second telephone rings, the first telephone or its cable is defective.