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Create a Telnyx FQDN connection whose primary destination is the platform SIP FQDN. Assign the DID, and configure Telnyx ANI and DNIS number formats as +E.164. On the platform, use the exact +E.164 DID and Provider source IPs. Telnyx credentials or IP authentication for calls into Telnyx are outbound settings; they do not document digest authentication from Telnyx to an arbitrary FQDN destination. Allow both signaling addresses for the connection’s selected inbound region: The LiveKit quickstart uses TCP 5060; Telnyx also supports TLS 5061. Re-open the Telnyx live network page before saving because regional addresses can change.

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Validate

Place one external inbound call and verify the call record, assigned assistant, and two-way audio. If it fails, check the connection’s inbound region and the DID format before widening any address range. Sources: LiveKit Telnyx guide, Telnyx authentication directions, Telnyx live SIP network data. Accessed 22 August 2026.