Category Archives: SIP

SIP/2.0 415 Unsupported Media Type

SIP 415 unsupported Media Type #SkypeforBusiness Continue reading

Posted in Firewall Rules, SIP, SIP 415, SIP/2.0 415 Unsupported Media Type | Tagged , , | 2 Comments

Enable Referred By Header

I have often come across a SIP vendor that uses the CLI for billing purposes. This can be an issue when A (External PSTN party) calls B (lync DDI user) which is forwarded or transferred to C (external PSTN party).In … Continue reading

Posted in B-Party, Billing, CLI, Refer Support, Referred-by, SIP | Leave a comment

SIP Options

For some time now I have seen my Wireshark traces and the event log on the Mediation Server report an issue with regard to SIP Options. I finally was forced to pay attention to this item during a recent deployment. … Continue reading

Posted in SIP, SIP Options | Leave a comment