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By Otto Geschke
#5342
Beware, the last version of FritzOS that worked with Voipfone was version 6.52. With versions since then, v6.80 and v6.83, SIP registration with Voipfone seems to be broken. An error message in the Fritz!box log indicates that registration has timed out. The solution is to roll back FritzOS to version 6.52.
I have raised this issue with AVM, the German manufacturer of the Fritz!box, and received no helpful response. This is a shame, because the Fritz!box is a very versatile device.
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