sip2ai

Go SIP-to-AI voice bridge. Accepts inbound SIP calls from a PBX (Asterisk / FreeSWITCH) and bridges the audio to an AI voice backend in real-time.

Supported AI providers

Provider	Protocol	Audio format
OpenAI Realtime	WebSocket	G.711 µ-law 8 kHz (native)
Deepgram Voice Agent	WebSocket	G.711 µ-law 8 kHz (native)
Gemini Live (BidiGenerateContent)	WebSocket	PCM16 16 kHz send / 24 kHz recv

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Requirements

• Go 1.23+
• A SIP PBX that can route calls to this process (Asterisk, FreeSWITCH, Kamailio, …)
• API key for at least one AI provider

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Build

git clone <repo>
cd sip2ai
go build -o sip2ai ./cmd/sip2ai

Or run directly without a binary:

go run ./cmd/sip2ai

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Kubernetes (Helm)

Install from OCI registry:

helm install sip2ai oci://ghcr.io/<owner>/charts/sip2ai \
  --version 1.0.0 \
  --set secrets.openai=sk-... \
  --set config.ai.provider=openai

Or from local checkout:

helm install sip2ai deploy/helm/sip2ai \
  --set secrets.openai=sk-...

Using an existing secret

Create a secret with provider API keys:

kubectl create secret generic sip2ai-keys \
  --from-literal=openai=sk-... \
  --from-literal=deepgram=... \
  --from-literal=gemini=...

Then reference it:

helm install sip2ai deploy/helm/sip2ai \
  --set existingSecret=sip2ai-keys

Override config values

All fields under config: in values.yaml map directly to config.yaml:

helm install sip2ai deploy/helm/sip2ai \
  --set config.ai.provider=openai \
  --set config.openai.voice=shimmer \
  --set config.log.level=debug \
  --set "config.openai.system_prompt=You are a sales agent."

Uninstall

helm uninstall sip2ai