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[Example] 380 — Bandwidth Real-Time Call Transcription (Node.js)#161

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[Example] 380 — Bandwidth Real-Time Call Transcription (Node.js)#161
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@github-actions github-actions bot commented Apr 3, 2026

New example: Bandwidth Real-Time Call Transcription

Integration: Bandwidth | Language: Node.js | Products: STT

What this shows

A Node.js Express server that answers inbound Bandwidth voice calls using BXML, opens a WebSocket media stream via the <StartStream> verb, receives μ-law audio from Bandwidth, forwards it to Deepgram's live STT WebSocket, and logs real-time transcripts to the console. Demonstrates the Bandwidth → Deepgram telephony transcription path for enterprise carrier-grade voice.

Required secrets

  • BW_ACCOUNT_ID — Bandwidth account ID
  • BW_USERNAME — Bandwidth API username
  • BW_PASSWORD — Bandwidth API password
  • BW_VOICE_APPLICATION_ID — Bandwidth voice application ID
  • BW_NUMBER — Bandwidth phone number

Tests

✅ Tests passed (with DEEPGRAM_API_KEY; Bandwidth credentials simulated)

Downloading test audio...
Converting to mulaw 8 kHz mono...
Audio ready: 207466 bytes of mulaw 8 kHz

Server started on :3099
POST /webhooks/answer -> BXML with correct <StartStream>

Streaming audio through server -> Deepgram (up to 30 s)...
[bandwidth] Stream started — call: test-call-id
[bandwidth] Audio format: audio/PCMU @ 8000 Hz
[deepgram] Connection opened
[interim] Yeah. Is
[final] Yeah. As as much as, it's worth celebrating,
[bandwidth] Stream stopped — call: test-call-id

Received 6 transcript event(s)
Transcript length verified: 125 chars for 10s of audio

All tests passed

Closes #143

Built by Engineer on 2026-04-03

@claude
feat(examples): add 380 — Bandwidth real-time call transcription (Nod…
03ef41c 
…e.js)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
@github-actions github-actions bot added type:example New example language:node Language: Node.js integration:bandwidth Integration: Bandwidth labels Apr 3, 2026
@github-actions github-actions bot mentioned this pull request Apr 3, 2026
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@github-actions github-actions bot added the status:needs-credentials Missing env vars for E2E tests label Apr 3, 2026
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github-actions bot commented Apr 3, 2026

⏳ Waiting on credentials

Missing: BW_ACCOUNT_ID BW_USERNAME BW_PASSWORD BW_VOICE_APPLICATION_ID BW_NUMBER

Add these as repository secrets and the next review sweep will pick this up.

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integration:bandwidth Integration: Bandwidth language:node Language: Node.js status:needs-credentials Missing env vars for E2E tests type:example New example

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Bandwidth real-time call transcription

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