SIP Integration & Numbers

Import or provision SIP numbers and connect custom trunks. Route calls to AI agents instantly without changing your carrier.

Manage your telephony infrastructure and AI routing in one place. Import existing numbers from Twilio or Telnyx, provision new SIP numbers directly, or configure custom SIP trunks for any provider. Set up inbound/outbound routing, secure authentication, transport protocols, and assign AI agents to handle calls automatically. No vendor lock-in, no rip-and-replace.

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Key Highlights

What Makes This Feature Special

Discover the powerful capabilities that drive real business results

Provision New SIP Numbers Instantly

Get a brand new phone number powered by our SIP infrastructure. Choose your area code, complete secure payment, and start receiving calls within minutes. Fully managed telecom so you can focus on conversations.

One-Click Import from Twilio & Telnyx

Already using Twilio or Telnyx? Import your existing numbers with one click. Automatic SIP trunk configuration, auth credentials, and routing. Keep your current numbers, get AI-powered conversations without changing anything your customers see.

Custom SIP Trunk for Any Provider

Use Vonage, Bandwidth, 8x8, or any SIP provider? Configure custom SIP trunks with full control over inbound/outbound routing, authentication, IP whitelisting, and transport protocols (UDP, TCP, TLS, AUTO).

Advanced Inbound & Outbound Routing

Full control over call flow. Inbound: allowed numbers whitelist, IP restrictions (CIDR), SIP authentication. Outbound: custom SIP URI, transport selection, caller ID management. Route different AI agents for inbound vs outbound.

How It Works

Get started with this feature in a few simple steps

Everything you need to transform your voice operations from start to finish

Number Provisioning
Step 01

Provision New SIP Numbers Instantly

Get a brand new phone number powered by our SIP infrastructure. Choose your area code, complete secure payment, and start receiving calls within minutes. Fully managed telecom you focus on conversations, we handle the routing.

  • Choose area code and pattern
  • Secure payment processing
  • 2-5 minute provisioning
  • Fully managed infrastructure
  • No setup fees
Number Import
Step 02

One-Click Import from Twilio & Telnyx

Already using Twilio or Telnyx? Import your existing numbers with one click. We automatically configure SIP trunks, auth credentials, and routing. Keep your current numbers, get AI-powered conversations. Your customers don't know anything changed.

  • One-click import
  • Automatic SIP configuration
  • Keep existing numbers
  • Import reports with status
SIP Trunking
Step 03

Custom SIP Trunk for Any Provider

Use Vonage, Bandwidth, 8x8, or any SIP provider? Configure custom SIP trunks with full control over inbound/outbound routing, authentication, IP whitelisting, and transport protocols. Choose UDP (fastest), TCP (reliable), TLS (secure), or AUTO.

  • Any SIP provider supported
  • UDP, TCP, TLS, AUTO protocols
  • IP whitelisting (CIDR)
  • SIP authentication
  • Custom headers and routing
Multi-Agent Routing
Step 04

Multi-Agent Call Handling

Assign different AI agents to different numbers, or even different agents for inbound vs outbound on the same number. Use specialized AI for customer support, sales qualification, after-hours coverage, or department-specific routing. Full flexibility for complex call flows.

  • Separate agents per number
  • Inbound vs outbound AI routing
  • Department-specific AI
  • After-hours coverage
  • Seamless agent handoff
Endless Possibilities
Scale your voice operations without limits
Benefits

Transform Your Business

Discover the measurable impact and advantages that drive real business growth

Import existing numbers or provision new ones instantly

One-click migration from Twilio & Telnyx

Support for UDP, TCP, TLS, and AUTO transport protocols

IP whitelisting & SIP authentication for security

Multi-agent routing different AI per number or direction

Secure subscription management & payments

Global coverage with 100+ country codes

99.9% uptime carrier-grade infrastructure

Cancel or reactivate numbers anytime

Solutions

Industry Solutions

Discover how this feature powers tailored solutions across industries

AI-Powered Contact Center Automation Build Custom Voice AI Agents

Build a Voice AI agent for your contact center. Reduce costs by 40-60% while delivering superior customer experience.

Explore Solution

AI Voice Automation for BPO Companies Scale Operations & Reduce Costs

Build a Voice AI agent for your BPO operations. Handle customer service, data collection, and support tasks around the clock.

Explore Solution

AI Phone System for Tech Call Centers 24/7 Support & Routing

Build a Voice AI agent for your tech call center. Handle support tickets, technical routing, and customer inquiries around the clock.

Explore Solution
Customer Success

See How Our Customers Use This

Real businesses getting real results with this feature. Read their stories.

How a Telecom MSP Replaced Their Customer Service Team with VoiceInfra AI Agents

A US-India telecom MSP replaced their human customer service with VoiceInfra AI agents that handle new leads, troubleshoot issues, report incidents, and transfer callers to the right extension

Read Success Story

How a UCaaS Provider Connected PortsIP PBX with VoiceInfra AI Agents for US and Australia Launch

A UCaaS provider building a US and Australia operation connected their PortsIP PBX platform with VoiceInfra AI agents to offer AI-powered call handling to their enterprise clients

Read Success Story

How an Australian MSP Connected Enreach Telephony with VoiceInfra AI Agents

A Brisbane-based managed IT services provider connected their Enreach telephony platform with VoiceInfra AI agents to offer AI-powered call handling to their Australian business clients

Read Success Story
Technical Excellence

Technical Specifications

Enterprise-grade infrastructure built for reliability and scale

100+ Countries

Global number coverage

Twilio/Telnyx Import

One-click migration

Custom SIP Trunks

Any provider supported

TLS Encryption

Secure SIP transport

FAQ

Frequently Asked Questions

Find answers to common questions about this feature

Yes. Import from Twilio or Telnyx with one click, or configure any SIP trunk with your existing numbers. Your customers keep calling the same number now powered by AI. No need to update business cards or websites.

New SIP numbers provision in 2-5 minutes after payment. Choose your area code, complete secure payment, and the number is ready to use. Imports from Twilio/Telnyx are instant.

Only if importing from those providers. Our SIP numbers don't require external accounts we handle everything. If you already use Twilio or Telnyx, import your existing numbers. If not, just provision new ones directly.

UDP works for most providers it's the fastest and default. Choose TCP for more reliability. Choose TLS for maximum security (encrypted SIP). Or select AUTO to let the system choose the optimal protocol.

Yes. Each number can have separate inbound and outbound agents. Use specialized AI for different purposes one agent for customer support, another for sales, another for after-hours. Multi-agent routing gives you complete control.

Yes. Use the allowed numbers whitelist to only accept calls from specific callers. Also supports IP CIDR ranges for IP-based restrictions. SIP authentication is available for additional security.

You'll see a detailed import report showing which numbers succeeded and which failed with specific error reasons. Common issues include invalid credentials, number already ported, or provider restrictions. Support can help resolve failures.

Yes. 100+ country codes supported including USA, Canada, UK, Germany, France, Australia, India, Japan, Singapore, UAE, Brazil, and more. Contact us for specific country availability.

VoiceInfra numbers can be scheduled for cancellation at the end of the billing period, or cancelled immediately for other providers. Reactivate cancelled numbers anytime if you change your mind. Secure deletion requires provider credential verification.

Yes. You get test credits to make free calls and full access to all phone system features provisioning, imports, SIP trunking, and AI routing. No credit card required to start. Try before committing.
Platform Features

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Embed a customizable AI widget on your website that handles voice calls and live chat conversations. Configure appearance, collect lead information through forms, and let your AI agent engage visitors 24/7, no coding required beyond a single script tag.

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Smart Voicemail Detection

Stop wasting time and money on voicemail loops. VoiceInfra's Voicemail Detection identifies answering machines the moment they answer. You control the outcome: hang up immediately to save time, or enable Smart Voicemail Handling to leave a tailored message for the recipient.

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