Kamailio SIP server configuration and troubleshooting. Use when Claude needs to:
(1) Edit or create Kamailio configuration files (.cfg)
(2) Debug SIP routing logic (request_route, failure_route, reply_route)
(3) Work with Kamailio pseudo-variables ($ru, $fU, $avp, $xavp, $dlg_var)
(4) Configure modules (tm, dialog, acc, sqlops, jansson, http_client, rr, sl, mqueue, rtimer)
(5) Understand SIP message flow and transaction handling
(6) Validate configuration syntax
Triggers: "kamailio", "SIP routing", "kamailio.cfg", SIP-related pseudo-variables