Asterisk PJSIP Tips and Tricks

pjsip set logger on is the PJSIP equivalent of sip set debug on from chan_sip. It dumps full SIP message traces to the CLI — invaluable for diagnosing registration failures, one-way audio, or codec negotiation issues. Remember to turn it off when done.

If a customer reports their phone "isn't working", check the Subscriptions page first — you can instantly see if the endpoint is registered without touching the PBX. The SIP Events Timeline will show you exactly when it dropped.