Voice Infrastructure for AI Agents

Connect AI voice agents to local numbers in 130+ countries. Launch in hours with direct carrier routing, HD voice, and SIP for Vapi, ElevenLabs, Retell, and LiveKit.

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Voice quality shapes AI performance

Audio fidelity drives recognition accuracy

When audio degrades, speech-to-text fails. G.722 wideband codec support keeps the signal clean for your AI models.

Latency shapes conversation flow

Every millisecond of delay creates awkward silences. Regional gateways shorten the voice path between your AI and the caller.

Scale limits throttle growth

Fixed channel caps throttle traffic. Flexible CPS lets your AI scale from 10 calls to 10,000 without a tier upgrade.

What didlogic provides for AI voice

Global number coverage

Local and toll-free numbers in 130+ countries. Regional gateways reduce latency between your AI and the caller.

HD voice (G.722)

Wideband codec support. Higher audio fidelity improves STT accuracy and TTS clarity for AI conversations.

Elastic scale

Raise CPS and concurrent channels at no extra cost for AI-native accounts. No tier upgrade required. Capacity changes apply in minutes.

SIP REFER for call transfer

Native SIP REFER lets AI voice agents transfer calls to human agents without dropping the session.

Platform-specific setup

Documented guides for Vapi, ElevenLabs, Retell, LiveKit, Synthflow, and Bland AI. Engineering support during integration.

Pay-as-you-go pricing

No per-channel fees. No per-trunk charges. No long-term contracts on standard accounts.

What matters for AI voice

Capability	What didlogic provides	Impact on AI voice
Latency	Distributed regional gateways	Shorter voice paths, fewer awkward silences
Audio quality	G.722 HD codec support	Higher STT accuracy and clearer TTS playback
Scale	Flexible CPS and concurrent channels, raised at no extra cost for AI accounts	Capacity grows with traffic, no tier upgrade
Call transfer	Native SIP REFER	AI transfers to human agents without session drop
Setup	Platform-specific guides and engineering assistance	Faster time to first test call
Network	Own Autonomous System (AS13006), 12 physical PoPs	No middlemen between your audio and the carrier

How AI voice agents connect to the phone network

One provider for steps 2 and 3. One account, one portal, one invoice.

Your AI platform

Handles speech recognition, language processing, and voice synthesis.

SIP trunk (didlogic)

Routes audio between the AI and the carrier network. Handles codec negotiation, SIP REFER, and failover.

DID numbers (didlogic)

Local presence in 130+ countries. Callers reach a familiar number that forwards to your AI over SIP.

Phone network

Direct carrier connections terminate the call. Regional gateways keep the voice path short.

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How didlogic supports AI teams in practice

Twilio bypass for GoHighLevel

Challenge:
A high-volume client using GoHighLevel needed didlogic routing. Their CRM was locked into Twilio.

Solution:
Our engineering team shipped native Twilio integration in five business days. The client routes traffic through GHL, Twilio, and didlogic without changing the CRM workflow.

Vapi migration support

Challenge:
A DNS resolution error during a Vapi infrastructure migration threatened to take hundreds of voice agents offline.

Solution:
Our team identified the issue, tested a workaround, and distributed the fix through direct email and the Vapi Discord community.

AI voice platforms on didlogic

Platform	Monthly minutes	Monthly calls
Retell	xxx,xxx	xxx,xxx
ElevenLabs	xxx,xxx	xxx,xxx
Vapi	654,036	660,075

View setup guides

Why AI teams choose didlogic

15 years of DID expertise

240 carrier agreements across 130+ countries. 10,000+ numbers in stock. Licensed local voice in regulated markets.

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Infrastructure you can verify

Founded in 2006, headquartered in Singapore. We operate our own Autonomous System (AS13006) with owned hardware across 12 data centers.

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Direct engineering support

Reach our engineers at [email protected]. Active on Vapi Discord during migration windows and technical escalations.

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Pricing that scales linearly

No per-channel fees. No seat licenses. Per-minute and per-number pricing. Free CPS increases for AI accounts.

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Tools for AI teams

MCP server

AI-native interface at mcp.didlogic.com. Manage numbers, SIP accounts, and telephony from tools like Claude Code and Cursor.

REST APIs

Provision DIDs, configure SIP, pull CDRs, and send SMS programmatically. Standard REST with JSON responses.

Self-service portal

Browse numbers, configure SIP trunks, view real-time CDRs, and manage billing from one dashboard.

CLI rotation

Cycle outbound caller IDs across your number pool. Increases pickup rates for high-volume AI campaigns.

Built to stay compliant across every market

Data processed on regional infrastructure

didlogic routes calls through its own regional data centers. Voice traffic stays on domestic infrastructure where required, keeping call handling aligned with local data processing laws.

Domestic PSTN handover, every time

Direct connectivity to 80% of Tier 1 carriers and national operators worldwide. Calls always hand over to the recipient’s local mobile network, not through foreign gateways.

Local calls recognized as local

EU and APAC DIDs are activated on domestic mobile networks. Outbound calls originate from in-country IPs with compliant caller IDs, so they arrive as domestic traffic rather than being flagged or blocked as foreign.

Regional experts monitoring every market

Our regional legal and telecom engineering teams track regulatory changes across the countries we serve. Call processing adjusts proactively when rules change, so your AI stays compliant without a ticket on your side.

What AI teams build on didlogic

AI receptionist and inbound support

Deploy AI voice agents on local numbers in each market. 24/7 coverage across time zones with HD audio.

Outbound sales and lead qualification

Local caller IDs that get answered. CLI rotation keeps pickup rates healthy. Direct carrier routing keeps conversations clear.

AI-to-human call transfer

Use SIP REFER to transfer complex cases to human agents. The session stays live and context transfers cleanly.

Multilingual customer service

Pair AI language models with local numbers across 130+ countries. Native-language support from one centralized deployment.

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Trusted global voice infrastructure

Used by businesses that need voice infrastructure to work reliably across markets, not just look good in a product demo. The scale below reflects live production traffic, broad country coverage, and an established network footprint.

Our clients

Start a free account. Our engineers help you set up SIP, provision numbers, and run your first test calls.

Connect your AI to global voice

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FAQ: AI Voice

What is SIP trunking for AI voice agents?

SIP trunking is the infrastructure that connects an AI voice agent to the public phone network. The AI handles speech and language; the SIP trunk carries the voice audio between the AI and the caller.

Which AI voice platforms does didlogic support?

Any platform with standard SIP support. Documented setup guides cover Vapi, ElevenLabs, Retell, LiveKit, Synthflow, and Bland AI. Custom AI agents work if they support SIP INVITE.

How fast can I get my AI voice agent live?

Most teams place their first test call the same day they sign up. Production rollout typically takes a few days, depending on your AI platform and the markets you serve. Regulated markets may take longer for compliance verification.

Why does audio codec matter for AI voice?

AI speech-to-text models are sensitive to audio quality. Narrowband codecs like G.711 compress voice to half the frequency range of natural speech. G.722 preserves a wider range, improving STT accuracy and TTS clarity.

What is SIP REFER and why does it matter?

SIP REFER is a protocol method for transferring an active call from one endpoint to another without dropping the session. AI voice agents use it to escalate calls to human agents while preserving context.

How does didlogic handle AI call volume spikes?

CPS and concurrent channel limits are raised at no extra cost for AI-native accounts. Capacity scales with your traffic rather than forcing tier upgrades.

How does didlogic compare to Twilio or Telnyx?

didlogic specializes in DID coverage and SIP infrastructure at the carrier level. Deeper global coverage (130+ countries versus 30+), no per-channel fees, free CPS increases for AI accounts, and direct carrier connections through AS13006.

How does pricing work?

Pay-as-you-go. No per-channel or per-trunk fees. You pay for DID numbers (monthly plus per-minute inbound) and outbound termination (per-minute). No contracts on standard accounts.

How do I get started with didlogic?

Sign up for a free account through the Get Started form. Our sales team reviews new accounts and contacts you to set up SIP credentials, provision numbers, and assist with platform-specific configuration.

Where do I get technical support?

Reach our engineering team at [email protected] during business hours. For platform communities, we respond to integration questions on Vapi Discord. Setup guides are at didlogic.com/setup/setup-guides.

What about compliance and regulated markets?

Didlogic holds local telecom licenses in 17 countries, supports E911/E112 in 46 countries, and provides licensed local voice where required. Our compliance team advises during onboarding.