SIP trunking for AI voice agents
Infrastructure you can count
+ countries
with local numbers
owned PoPs
on our own network
years
in carrier voice
%
voice service uptime
Why didlogic if I already use Vapi, Retell, or ElevenLabs?
What didlogic provides for AI voice agents
| Capability | What didlogic provides | Impact on AI voice |
|---|---|---|
| Latency | Under 20ms audio latency on 80% of calls. Distributed gateways across 12 PoPs keep most voice paths regional. | Conversations stay within the natural-speech response window. No awkward silences. |
| Audio quality | G.722 HD codec on supported destinations | 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 guides plus a technical session with our engineers | 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
-
Step 1
Your AI platform
Handles speech recognition, language processing, and voice synthesis.
-
Step 2
SIP trunk (didlogic)
Routes audio between the AI and the carrier network. Handles codec negotiation, SIP REFER, and failover.
-
Step 3
DID numbers (didlogic)
Local presence in 140+ countries. Callers reach a familiar number that forwards to your AI over SIP
-
Step 4
Phone network
Direct carrier connections terminate the call. Regional gateways keep the voice path short.
How didlogic supports AI teams in practice
A high-volume client using GoHighLevel needed didlogic routing. Their CRM was locked into Twilio.
๐ฆ๐ผ๐น๐๐๐ถ๐ผ๐ป:
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.
๐ง๐ฎ๐ธ๐ฒ๐ฎ๐๐ฎ๐:
Your AI platform doesn't ship carrier integrations. We do.
A DNS resolution error during a Vapi infrastructure migration threatened to take hundreds of voice agents offline.
๐ฆ๐ผ๐น๐๐๐ถ๐ผ๐ป:
Our team identified the issue, tested a workaround, and distributed the fix through direct email and the Vapi Discord community.
๐ง๐ฎ๐ธ๐ฒ๐ฎ๐๐ฎ๐:
When your AI platform has an infrastructure incident, you need a carrier already inside the room.
| Platform | Monthly minutes | Monthly calls |
|---|---|---|
| Retell | 300k+ | 300K+ |
| ElevenLabs | 120K+ | 100K+ |
| Vapi | 650k+ | 660k+ |
Why AI teams choose didlogic
Tools for AI teams
Built to stay compliant across every market
What AI teams build on didlogic
FAQ: AI Voice agents
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.
What latency can I expect for AI voice calls?
80% of calls on regional paths complete with under 20ms round-trip audio latency, routed through our 12 physical PoPs on Autonomous System AS13006 with direct Tier 1 peering. Cross-region and long-haul routes carry higher latency depending on geography and carrier path. Your actual end-to-end latency also depends on your AI platform’s processing time, which sits outside the voice transport layer.
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: numbers in 140+ countries, no per-channel fees, free CPS and capacity increases for AI accounts, and a technical session with engineers during onboarding rather than ticket-only support.
For a feature-by-feature breakdown, see our Twilio alternative for AI voice page.
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 docs.didlogic.com.
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. Compliance documents are verified automatically in about 5 minutes, and our compliance team advises during onboarding.
I already use Vapi/Retell/ElevenLabs. Why do I need didlogic?
AI voice platforms handle the conversation โ speech recognition, language model, voice synthesis. They don’t operate the phone network. By default they route calls through resold Twilio trunks, which works for prototypes but breaks down on three things at scale: per-minute cost (often 2-5x direct carrier rates), DID coverage outside the US/UK, and call quality on regional Tier 2/3 destinations. didlogic is the carrier layer: AS13006, 12 owned PoPs, Tier 1 peering, DIDs in 140+ countries. You BYOC didlogic into your AI platform and keep the agent you already built.
Can I attach a phone number to my AI agent?
Yes. Buy a local or toll-free number from didlogic in 140+ countries, point it at your AI platform over SIP, and inbound calls reach your agent. Outbound works the same way in reverse: your agent places calls through a didlogic SIP trunk and presents the number as caller ID. Setup guides cover Vapi, ElevenLabs, Retell, LiveKit, Synthflow, and Bland AI.
Can I record AI agent calls for QA and training?
Yes. Call recording can be enabled per SIP account or per number, and every recording is mapped to its call detail record by Call ID. Webhooks notify your systems the moment a recording is ready, so audio flows straight into your QA or evaluation pipeline.
Does didlogic detect answering machines on outbound AI calls?
Answering machine detection is available on supported routes, so outbound agents connect to live people instead of voicemail. Ask our team whether your destinations are covered.