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📞Layer 1: Voice Edge

The call's entry point (HGW / Asterisk / bridge). Current operations vs. Phase C v2.

The physical entry point for calls (the Voice Edge). A Hikari Denwa HGW receives the call, Asterisk passes the audio to bridge.py over AudioSocket, and OpenAI Realtime makes the decision.

Architecture

HGW (Hikari Denwa) SIP REGISTER extension Asterisk 22 (chan_pjsip) dialplan bridge.py AudioSocket :9092 / μlaw↔PCM OpenAI Realtime classify_call AMI DBPut :5039 write verdict AstDB aegis_verdict/${UNIQUEID} spam → Hangup(21) fail-safe allow → Dial(ALLOW_DESTINATION) normal forward unknown/empty → Dial(HUMAN_PEER) fail-open (C-2(b))
Diagram: solid = audio path (μlaw 8k ↔ PCM 24k); dashed = verdict return path (bridge→AMI→AstDB→dialplan). The dialplan branches three ways on the verdict.

Current operations vs. Phase C v2

Current operations (v1) voice-edge A22 (pre on-device test)
Hardware Existing equipment New Raspberry Pi 3B
OS Raspbian 9 Raspberry Pi OS Bookworm 64-bit
Asterisk Asterisk 11 Asterisk 22
SIP chan_sip chan_pjsip
Audio link (legacy path) AudioSocket → bridge.py
Setup Via ChatVoice deploy.sh / verify.sh / systemd
✅How failures fall (important)

spam is a Hangup (fail-safe = block); anything undecidable or any fault goes to a human (fail-open = stay in business). We do not use cutting everything off (fail-closed); it was removed in C-2(b). See the glossary for details.

Key parameters

  • AudioSocket: 127.0.0.1:9092 (μlaw 8kHz ↔ PCM16 24kHz resampling)
  • AMI: 127.0.0.1:5039 (Action: DBPut writes the verdict to AstDB)
  • dialplan placeholders: <ALLOW_DESTINATION> (allow forwarding target) / <HUMAN_PEER> (fail-open hand-off target)