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Use this page to choose the exact carrier or PBX guide that matches your setup. Each provider now has its own page so you can send the right instructions to teammates, customers, or implementation partners. Prerequisites: A configured SIP trunk in Telephony → SIP Trunks.

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Choose Your Provider

Twilio

Set up Elastic SIP trunking and configure number routing

Telnyx

Connect via SIP with credential or IP authentication

3CX

Set up PBX inbound routing through itellicoAI

Sipgate

Import and forward existing Sipgate numbers

Easybell

Configure SIP forwarding for DACH region numbers

Fritzbox

Connect a local PBX and configure DynDNS forwarding

NFON

Configure NFON routing and credentials

Placetel

Set up your Placetel SIP account and forwarding

Starface

Configure your Starface PBX trunk

Fonial

Set up your Fonial SIP registrar and forwarding

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Before You Open A Provider Guide

Have these ready:
  1. The carrier’s SIP registrar or connection URI
  2. Authentication details or source IPs
  3. The phone numbers you want to import in E.164 format
  4. A target agent already configured for routing

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General Tips For Any SIP Provider

  1. Use E.164 format for all phone numbers (+43720123456, not 0720123456)
  2. Test with one number first before importing all numbers
  3. Check firewall rules so the provider can reach the itellicoAI SIP endpoint
  4. Monitor call quality because SIP routing adds network hops that can affect latency
  5. Keep credentials secure and store secrets in Secrets where possible
If your provider is not listed here, the general SIP Trunks guide covers the universal setup pattern: create a trunk, enter credentials, import numbers, and configure forwarding.

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Next Steps

SIP Trunks

Set up a SIP trunk using the general guide

Phone Numbers

Manage imported numbers

Buy Numbers

Use marketplace numbers if you do not want BYOC

Production Checklist

Complete pre-launch verification steps