For reuse, an OpenSIPS/Kamailio snippet to translate commonly used SIP (VoIP) phone Caller-ID (CLI) headers into a single one (Remote-Party-ID).
sip ser snippet rpid opensips kamailio
So, I wanted to test video support with Asterisk. That was easier said than done, because the SIP softphones that ship with Ubuntu don't all do what they promise.
sip video softphone
Every one in a while, I see an unexpected 403 response to a SIP client's REGISTER request. Thusfar the digest response calculation has never been wrong, but it feels good to get that check out of the way and move on to other possible causes.
sip auth bash