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Twilio Real-Time Voice Infrastructure

System Architecture

The telephony system is split cleanly between standard HTTP webhooks and low-latency duplex audio streaming.

Authentication & Token Exchange

  1. The frontend client requests a communication channel.
  2. The Laravel backend generates an ephemeral cryptographic JWT Access Token embedded with explicit Voice Grants.
  3. The frontend utilizes the Twilio Voice JS SDK to initialize a peer connection using the token.

Live Media Streaming (WSS)

  • Protocol: WebSockets Secure (wss://)
  • Routing: Twilio pipes raw bi-directional audio directly to our media processing servers via custom TwiML App configurations.
  • Network Security: The inbound /api/calls/store endpoint is guarded by a strict firewalled IP Allow List, matching official Twilio proxy load balancers exclusively.