Technical context: I spent a long time trying to get a Yealink T21P_E2 desk phone working against my LiveKit SIP trunk (*************.sip.livekit.cloud). Registration works fine over TLS/5061, but every outbound call from the phone goes out over plain UDP/5060 no matter how the account is configured — and your trunk doesn’t respond on UDP/5060 at all (confirmed via packet capture, zero replies either way). Network path itself is fine — TCP to port 5061 connects cleanly, and the same phone works normally against other SIP providers. So it looks like a hard incompatibility between this phone’s outbound call behavior and a TLS-only, no-REGISTER trunk, not something fixable on my end.
Please proceed with the account deletion unless you can help me