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MODULE 70 // CONVERSATIONAL VOICE AGENTS/ULTRA-LOW LATENCY TELEPHONY

Conversational Voice Agents That Speak and Listen Like Humans.

Sub-300ms glass-to-glass latency, natural turn-taking, intelligent interruption handling, and native SIP/PBX integration for customer service phone lines.

Deploy Agent in 5 Minutes
[Target Architectural Benchmark: Verified against live acoustic checkpoints and low-latency WebSockets.]
MODULE 70 // CONVERSATIONAL VOICE AGENTS/ULTRA-LOW LATENCY TELEPHONY

Conversational Voice Agents That Speak and Listen Like Humans.

Sub-300ms glass-to-glass latency, natural turn-taking, intelligent interruption handling, and native SIP/PBX integration for customer service phone lines.

The Telephony Frustration

Legacy Voice Bots Frustrate Callers with Dead Air and Collisions

Traditional interactive voice response (IVR) systems force callers into rigid numeric trees or robotic wait times. Audio collisions happen whenever a customer tries to interrupt, resulting in abandoned calls and frustrated customers.

Telephony Call Architecture Trace
268ms Total Loop
Streaming ASR45ms
LLM Reasoning115ms
Sono Neural TTS108ms
Protocol: SIP Trunk (Twilio Voice)Codec: G.711u / 8kHz
00:04

Agent: “Welcome to Premier Medical. How may I assist you today?”

00:08

Caller: “I need to move my appointment to Thursday at 4 PM.”

Tool Invocation: GET /api/calendar/slots
Acoustic Backchannel emitted: “Checking Thursday openings...” (32ms)
00:15

Agent: “Done! Rescheduled for Thursday at 4:00 PM. A confirmation text was sent.”

Carrier Bridges: Twilio · Asterisk · FreeSWITCH · Genesys99.95% Telephony Gateway SLA

Conversational Audio Capabilities

Instant Interruption HandlingFULL-DUPLEX

Sono listens continuously while speaking. When a caller interrupts, audio playback halts in under 50ms without audio collisions.

Operational Ref: Sub-50ms Interruption Detection
Natural Backchanneling & FillersHUMAN CADENCE

Inserts natural acoustic confirmations ('Got it, checking that now') while fetching records, eliminating awkward phone silence.

Operational Ref: Acoustic Backchannel Generation
Native Telephony & SIP TrunkingCARRIER READY

Connect directly to Twilio Voice, Asterisk, FreeSWITCH, Vonage, and Genesys via standard SIP URI forwarding and WebRTC.

Operational Ref: G.711u / G.711a SIP Trunk Bridge
Real-Time Tool Calling & MutationsACTION ORIENTED

Agents query SQL databases, verify caller identity via SMS OTP, mutate order tables, and schedule calendar appointments mid-call.

Operational Ref: Deterministic Tool Calling Loop
TELEPHONY PIPELINE

Conversational Voice Loop Architecture

Sub-300ms glass-to-glass turn-taking from telephone SIP packets to neural speech output.

01

Incoming Audio Frame Ingestion

SIP trunk or WebRTC socket delivers raw 8kHz/16kHz audio frames directly to the streaming pipeline.

Sub-40ms ASR Frame
02

Endpointing & Intent Extraction

Neural voice activity detection (VAD) detects speech boundaries and suppresses ambient background noise.

Acoustic VAD Filter
03

Real-Time Tool Execution

Agent executes CRM lookups or scheduling mutations, streaming backchannel audio to keep caller engaged.

120ms LLM Inference
04

Streaming Neural Voice Return

Sono synthesizes audio chunks instantaneously over the telephony channel for seamless conversational flow.

Sub-300ms Total Loop
Connect Telephony with Enterprise InfrastructureDeploy dedicated SIP concurrency lanes or air-gapped voice clusters