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Connect Plivo SIP trunking to ElevenLabs to enable your AI agents to make and receive phone calls through Plivo’s global voice network.

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Prerequisites

Optimize for latency: For best call quality, deploy your ElevenLabs server in a region closest to your call traffic. This minimizes audio delay and improves conversation flow.
India regional requirement: If handling calls to/from India, your ElevenLabs deployment must be in India. Contact ElevenLabs sales team to set this up. Calls will fail with “Domestic Anchored Terms not met” error otherwise. See Calling in India.

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Part 1: Receive Incoming Calls

Route calls from your Plivo phone number to an ElevenLabs AI agent.

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Step 1: Create an Inbound Trunk in Plivo

  1. Go to SIP Trunking → Inbound Trunks
  2. Click Create New Inbound Trunk
  3. Enter a name (e.g., ElevenLabs-Inbound)
  4. Click Add New URI and configure:
For TLS: sip.rtc.elevenlabs.io:5061;transport=tls For India: sip.rtc.in.residency.elevenlabs.io:5060;transport=tcp
  1. Click Create Trunk

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Step 2: Connect Your Phone Number

  1. Go to Your Numbers
  2. Click on your phone number
  3. Set Application Type to Zentrunk
  4. Set Trunk to your inbound trunk
  5. Click Update Number

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Step 3: Configure ElevenLabs

Import your Plivo number in ElevenLabs to accept incoming calls. See ElevenLabs SIP Trunking documentation for detailed steps.

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Part 2: Make Outgoing Calls

Enable ElevenLabs to make outbound calls through Plivo.

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Step 1: Create an Outbound Trunk in Plivo

  1. Go to SIP Trunking → Outbound Trunks
  2. Click Create New Outbound Trunk
  3. Click Add New Credentials List and create credentials:
    • Username: elevenlabs_trunk (or your preferred username)
    • Password: Generate a strong password
  4. Enter a trunk name (e.g., ElevenLabs-Outbound)
  5. Enable Secure Trunking (recommended)
  6. Click Create Trunk
  7. Copy your Termination SIP Domain (e.g., XXXXXXXXXXXX.zt.plivo.com)

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Step 2: Configure ElevenLabs

Use the credentials and termination domain from Plivo to configure outbound calling in ElevenLabs. See ElevenLabs Plivo integration guide for detailed steps.

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Troubleshooting

Debug logs:
  • Inbound issues: Check Plivo logs first
  • Outbound issues: Check ElevenLabs logs first
For error codes, see Plivo hangup codes.