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StatusVon/FromBis/ToTitle
Maintenance Inactive
2025-12-15 08:00:00 2025-12-15 15:00:00 Finished: Maintenance Work on the Telephone Service (FreePBX)
The maintenance work was finished at 15:00h. Affected telephones that have not yet been re-registered can be put back into operation by briefly disconnecting the network cable.

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On Monday, 15.12.2025, maintenance work will be carried out on the telephone service FreePBX throughout the day. During this time, the IP phones connected to the new telephone system (FreePBX) will register multiple times. This will interrupt active conversation connections.

The following device types are affected:
- All Yealink IP phones
- Cisco CP-7841 phones where the hint "FreePBX" is visible in the top right corner of the phone display
- Some Gigaset DECT phones

If a Gigaset DECT phone does not have a connection to the server, the connection can be restored by restarting the base station (temporarily disconnecting the power).

The website "phonemgr.desy.de" and the softphones "Sangoma phone" will not be available during the maintenance work.

Caused by: Software Upgrade on the telephone system FreePBX
StatusVon/FromBis/ToTitle
Maintenance Inactive
2025-12-15 08:00:00 2025-12-15 18:00:00 Maintenance Work on the Telephone Service (FreePBX)
On Monday, 15.12.2025, maintenance work will be carried out on the telephone service FreePBX throughout the day. During this time, the IP phones connected to the new telephone system (FreePBX) will register multiple times. This will interrupt active conversation connections.

The following device types are affected:
- All Yealink IP phones
- Cisco CP-7841 phones where the hint "FreePBX" is visible in the top right corner of the phone display
- Some Gigaset DECT phones

If a Gigaset DECT phone does not have a connection to the server, the connection can be restored by restarting the base station (temporarily disconnecting the power).

The website "phonemgr.desy.de" and the softphones "Sangoma phone" will not be available during the maintenance work.

Caused by: Software Upgrade on the telephone system FreePBX