Telephony Providers

Edesy Voice Agent supports multiple telephony providers for both inbound and outbound calls.

Supported Providers

Choosing a Provider

For Indian Market

Recommended: Exotel

• Best coverage across India
• TRAI compliant (handles DND automatically)
• Competitive pricing for Indian calls
• Local support and documentation

For Global Coverage

Recommended: Twilio

• Widest international coverage
• Excellent documentation
• Robust WebSocket streaming
• Premium pricing

For Cost Optimization

Consider: Plivo or Telnyx

• Lower per-minute rates
• Good API compatibility
• Growing feature set

Common Features

All providers support:

• Inbound Calls: Receive calls on virtual numbers
• Outbound Calls: Initiate calls via API
• WebSocket Streaming: Real-time audio bidirectional streaming
• Call Recording: Automatic recording with URL callback
• Status Webhooks: Call status updates (ringing, answered, completed)
• DTMF Support: Keypad input handling

Audio Specifications

Integration Pattern

┌──────────────┐     ┌─────────────┐     ┌──────────────┐
│   Caller     │────▶│  Provider   │────▶│  Your Server │
│              │     │  (Twilio)   │     │  (WebSocket) │
└──────────────┘     └─────────────┘     └──────────────┘
       │                   │                    │
       │    Phone Call     │   Audio Stream     │
       │◀─────────────────▶│◀──────────────────▶│
       │                   │                    │
       │   Voice Response  │   AI Response     │
       │◀─────────────────▶│◀──────────────────▶│

Next Steps

• Twilio Integration - Set up Twilio
• Exotel Integration - Set up Exotel for India