Hi, i tried to connect my asterisk with sipcall.ch und run into the following problem: ------------------------ -- Executing Dial("SIP/2206-0df7", "SIP/0800800800@sipcall|240") in new stack -- Called 0800800800@sipcall Apr 2 11:40:41 NOTICE[32163]: chan_sip.c:6796 handle_response: Failed to authenticate on INVITE to '"user" <sip:41325112342@sip.backbone.ch>;tag=as088a8ebb' ------------------------ This is unclear to me, since the similar conf works with other providers. Any ideas sip.conf: ------------------------- register => 41325111234:meinpasswort@sip.backbone.ch/41325112342 [sipcall] type=peer secret=meinpasswort username=41325112342 fromuser=41325112342 fromdomain=sip.backbone.ch host=sip.backbone.ch dtmfmode=rfc2833 context=sipcall-in canreinvite=yes qualify=10000 nat=yes insecure=very -------------------------