Telnyx Direct Architecture

type: architecture

description: Direct Telnyx TeXML integration eliminating VAPI middleware -- full voice pipeline control at 60-80% cost savings

replaces: VAPI (eliminated from Genesis stack)

protocol: TeXML (XML-based call control)

savings_percentage: 65-70% per minute

stt_engine: Telnyx built-in (automatic language detection)

tts_engine: Telnyx NaturalHD (2,287 voices, zero additional cost)

hd_voice: Enabled by default on all Australian numbers, no extra cost

call_flow: Inbound -> TeXML app -> Webhook (identify caller, load memory) -> Gather+Speak loop -> Call-end webhook -> Async memory extraction

features:
Call control
STT
TTS
DTMF
Recording
Webhooks
Caller ID
HD Voice

existing_infrastructure: Already proven with AIVA production voice

target: ENT-telnyx-direct-vapi-elimination


VAPI Elimination Decision

type: milestone

decision: VAPI permanently eliminated from Genesis stack

rationale: VAPI adds $0.05/min markup for zero value not already available in Telnyx TeXML. AIVA already has working Telnyx pipeline. Full margin retained.

new_cost: $0.025-0.035/min (Telnyx Direct)

rule: References to VAPI are forbidden in all new Genesis work

type: ENABLES