[Spce-user] Strange behaviour by AVM Fritz!Box

C231edae c231edae at protonmail.com
Mon Jan 23 06:36:55 EST 2017


I'm having an issue with a Fritz!Box which I cannot understand nor fix. I hope someone of you already encountered and fixed this.

I have created a subscriber on my SP CE system with a single phone number. I have configured the Fritz!Box to register this account. Works fine. Outbound calls work fine as well. Inbound calls, however, don't work as expected.

The Fritz!Box accepts the SIP INVITE and signal SIP 180 Ringing. However no phone actually rings. I checked the call handling, the phone connected to the Fritz!Box is setup to ring for incoming calls to the SP CE subscriber.

Strange thing is that when I configure the call handling on the Fritz!Box to signal every call to the phone, the phone rings for inbound calls (of course it rings also for a potential 2nd subscriber configured for the fax machine, so it's not a solution to the problem.)

If you need/want more details, please let me know.

Best regards,

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