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In Plivo, create an Origination URI pointing to the platform SIP FQDN and assign the DID. Plivo explicitly supports authentication_needed, username, and password on the Origination URI. Therefore SIP username/password is the preferred platform inbound mode when those same credentials are configured in Plivo. Use the exact DID in +E.164. The LiveKit quickstart uses TCP. For TLS use 5061 and enable SRTP at both ends. If digest is not enabled, select Provider source IPs and allow all current Plivo signaling ranges for failover:
Do not configure both modes with unrelated credentials. Outbound Zentrunk authentication remains a separate provider-to-destination direction.

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Validate

Call the exact DID externally and confirm a new inbound record, correct assistant, and two-way audio. If using digest, a provider authentication failure must be visible before changing to IP authentication. Sources: LiveKit Plivo guide, Plivo Origination URI authentication, Plivo Zentrunk networks. Accessed 22 August 2026.