[Sip-implementors] Cause Code in the 500 Server Internal Error message

Good Day. Is it acceptable for a switch to send the cause code as a Reason in the 500 Server Internal Error Message instead of sending the Cause code on its own to the caller in a SIP voice call? Example below [cid:image002.png@01D15FE5.4EB417F0] Thank You and Warmest Regards David Mathe

[Sip-implementors] P-Access-Network-Info Header

Hi, Does P-Access-Network-Info Header received in INVITE should be validated? RFC-7315: P-Access-Network-Info = "P-Access-Network-Info" HCOLON access-net-spec *(COMMA access-net-spec) access-net-spec= (access-type / access-class) Should we

[Sip-implementors] RE-INVITE QUESTION

Hello, If anyone have an idea: UAC sends RE-INVITE, than send CANCEL request, is this situation is correct? Because dialog state is connected, and 200 OK for a first INVITE are sent. How We should process it? Please point me to rfc. Best regards, Roman.

Re: [Sip-implementors] RE-INVITE QUESTION

Hi, Following info might help you, Refer rfc 6141 section 3.8, *3.8* *. Clarifications on Canceling Re-INVITEs* Section 9.2 of RFC 3261 [ RFC3261 ] specifies

Re: [Sip-implementors] RE-INVITE QUESTION

On 2/4/16 11:11 AM, Roman Romenskyi wrote: Hello, If anyone have an idea: UAC sends RE-INVITE, than send CANCEL request, is this situation is correct? Because dialog state is connected, and 200 OK for a first INVITE are sent. How We should process it? Please point me to rfc. CANCEL has