To enable your Vozzo AI Agent to participate in PSTN telephony (traditional phone calls), you can assign a dedicated phone number to it. Vozzo manages the underlying SIP and telephony infrastructure using Plivo.
1. List Purchased Phone Numbers
Before assigning an agent to a phone number, fetch the available numbers in your organization using /plivo/numbers/list-numbers. This endpoint returns each number's rental ID (ph_rent_id), country, status, and currently assigned agent.
cURL
curl -X GET https://backend.vozzo.ai/plivo/numbers/list-numbers \ -H "Authorization: Token YOUR_API_KEY"
To attach your voice AI agent to one or more rented phone numbers, call the /plivo/numbers/assign-agent endpoint. When incoming calls arrive on these numbers, or outbound campaigns place calls through them, your configured AI agent handles the conversation.
Vozzo maps the assigned phone number to a dynamically scalable SIP endpoint.
Infrastructure
Standard carrier-grade reliability with low-latency WebRTC and LLM
pipelines.
BYOC Support
Support for Twilio, Vonage, or custom SIP trunks via standard INVITE
requests.
Bring Your Own Carrier (BYOC)
If your enterprise already uses Twilio, Vonage, or a custom SIP trunk, Vozzo supports receiving standard SIP INVITE requests directly. Contact enterprise support to provision an inbound SIP domain for your agent.