SIP proxy / registrar · C · see repo
Signalling at scale. Pairs with a media server rather than replacing one.
Last push 2026-09-07 · 2937 stars at survey time. github.com/kamailio/kamailio
Engineering and regulatory orientation, not legal advice. The FCC obligations named here are real and enforced; confirm your own position with counsel before carrying a single call to a phone number.