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

Supported Providers#

Provider	Region	Best For	WebSocket Support
Twilio	Global	International coverage	Native
Exotel	India	Indian market	Native
Plivo	Global	Cost-effective global	Native
Telnyx	Global	Enterprise SIP	Native
Alohaa	India	Indian enterprise	Native

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#

Parameter	Value
Sample Rate	8000 Hz
Channels	Mono
Bit Depth	16-bit
Encoding	μ-law (Twilio) / Linear PCM (Exotel)

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