Hi, I have noticed that when I am calling from my Snom-phone to another Snom-phone through Asterisk, the SIP-message's Contact -header could be sometimes empty and for example other Snom get no BYE-message. Here is example of that kind of message: 10 headers, 0 lines Sending to 192.168.0.32 : 5060 (non-NAT) Transmitting (no NAT): SIP/2.0 200 OK Via: SIP/2.0/UDP 192.168.0.32:5060;branch=z9hG4bK-9sbwo79ob74p From: <sip:donald@192.168.0.32>;tag=wxrasulsor To: "Mickey Mouse" <sip:asterisk@192.168.0.15>;tag=as700f09c7 Call-ID: 12e8e96a3a7c22da4da00d9e40d49684@192.168.0.15 CSeq: 2 BYE User-Agent: Asterisk PBX Contact: Content-Length: 0 Same thing with INVITEs also... Does this error depend on my configuration or is it Asterisk's bug ? Asterisk built from CVS-07/11/03-14:12:25. Thank you for any help! -Johanna