Queue: Bandwidth real-time call transcription (Node.js)

[github-actions]

Integration: Bandwidth Voice + Deepgram STT

Origin

Requested in #143: "Server-side Node.js using the Bandwidth Node SDK (@bandwidth/sdk). Bandwidth is a US carrier-grade CPaaS used by enterprises. Uses the Voice API to answer inbound calls and stream audio via Bandwidth's media streaming (WebSocket BXML verb) to a Node.js server, which forwards to Deepgram live WebSocket."

What this should show

• A Node.js server that answers inbound Bandwidth voice calls using BXML
• Uses Bandwidth's <StreamUrl> BXML verb to open a WebSocket media stream from the call
• Receives raw audio frames over the Bandwidth WebSocket and forwards them to Deepgram's live STT WebSocket
• Logs real-time transcription results to the console
• Professional telephony path: Bandwidth BXML (stream verb) → WebSocket server → Deepgram STT

Credentials likely needed

• BANDWIDTH_ACCOUNT_ID
• BANDWIDTH_API_TOKEN
• BANDWIDTH_API_SECRET
• BANDWIDTH_PHONE_NUMBER
• DEEPGRAM_API_KEY

Reference

Bandwidth Voice API docs: https://dev.bandwidth.com/apis/voice/
Bandwidth media streaming: https://dev.bandwidth.com/docs/voice/bxml/streamUrl/

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Queued by PM from #143 on 2026-04-03

[github-actions]

Built in #161