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Hi @ll, I just moved my Asterisk Box and changed the Provider and Internet Access to a full IP Access by Deutsche Telekom. I set up my sip.conf as I found various examples throughout the Net. Calls and some other stuff is basically working. The problem I ran into is, that the outgoing and incoming calls are dropped after exactly 15 Minutes. Solution for this should be setting the

...407665;rport > From: <sip:imsdroid>;tag=629978444 > To: <sip:imsdroid> > Contact: <sip:(null)@<my.ip.addr>:34778;transport=udp>;expires=600000;+g.oma.sip-im;language="en,fr";+g.3gpp.smsip;+g.oma.sip-im.large-message;audio;+g.3gpp.icsi-ref="urn%3Aurn-7%3A3gpp-application.ims.iari.gsma-vs";+g.3gpp.cs-voice > Call-ID: 3e130372-8de8-a6b4-6250-36307973a88f > CSeq: 2010551627 REGISTER > ontent-Length: 0 > Max-Forwards: 70 > Authorization: Digest username="imsdroid",realm="asterisk",nonce="39f59329",uri="...