Hello list members, we are evaluating a VoIP provider that is used as SIP Trunk (www.qsc.de, the product is named "IPFonie"). Incoming calls are working without any problems.
But when we are trying to place a call the INVITE sent by SipX contains the Session-expires header with the value "Session-Expires: 1800;refresher=uac" this is not accepted by the provider so that we get a 400 BAD REQUEST with following header inside: 'Warning: 399 SoftX3000 "SSF00158L01843 Invalid Refresher param in Session Expires Header"' And we do not have a chance to dial outside. So I already took a look at RFC 4028 ("Session Timers in the Session Initiation Protocol") and as far as I can see the behaviour of the softswitch is not correct as it should accept the header value with refresher=uac. Of course I told this to our provider but this won't help to get things work really soon. Iis there a way to change the behaviour of SipXbridge so that the refresher will be the UAS? Thanks in advance René
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