Enterprise SIP Trunking – Enterprise SIP Trunk Software Platform – Enterprise SIP Calling Software – Enterprise VoIP Calling Software

Enterprise SIP Trunking

Carrier-Grade SIP Trunk Platform Built for Global Enterprises

Enterprise SIP trunking connects your phone platform to high-quality VoIP service for 2-way calling around the globe. Make and take calls anywhere in the world with secure enterprise SIP calling software.

best international sip trunk provider

Connect Enterprise SIP Trunk Software to Any Platform

Highly-reliable VoIP SIP calling software that connects with virtually any system, including 3CX, Avaya, Microsoft Teams and many more.

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Manage Secure, Reliable Voice from an Intuitive SIP Trunk Platform

AVOXI's SIP enterprise trunking platform connects your existing system to secure, high-quality SIP calling with all the business features you need. Powered by a powerful voice network, virtual SIP trunking makes it easy to manage phone lines and voice features from an intuitive interface. Spend less on calls and get more in features with enterprise SIP trunk solutions provided by AVOXI.

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All the Voice Services You Need

Reliable inbound and outbound calling in local and abroad. Configure voice features like call routing and tracking, secure call recording, unlimited IVR, VoIP API, and many more.


Encrypted Network Built for Secure SIP Calling Anywhere

Real-time alerts on abnormal traffic with 24/7/365 manual fraud monitoring just in case. TLS and SRTP encryption ensures secure calling. 4.2 MOS Score backed by 99.995% uptime.


Modern Enterprise VoIP Trunking Reduces Call Costs

Enterprise SIP trunk software with unlimited channel capacity and local caller ID guaranteed in dozens of countries. Scale up or down automatically and only pay for what you use. No setup fees, minimum contracts, or ridiculous add-on fees. You can even get paid to port your existing numbers to AVOXI!

How Much Will Enterprise SIP Trunking Software Save You?
See Our Global VoIP Rate Sheet.

Secure Enterprise SIP Trunk Solutions for Reliable Calling

AVOXI's enterprise SIP trunking platform connects your existing system to secure, high-quality international calling with all the business features you need. Powered by a powerful voice network, AVOXI's platform makes it easy to manage SIP trunks from an intuitive interface. Spend less on calls and get more in features with flexible enterprise SIP trunking provided by AVOXI. 

Enterprise Voice Graphic

All the Voice Services You Need

Reliable inbound and outbound calling in South Africa and abroad. Configure voice features like call routing and tracking, secure call recording, unlimited IVR, VoIP API, and many more.


Secure VoIP Network Built for Global Reliability

Real-time alerts on abnormal traffic with 24/7/365 manual fraud monitoring just in case. TLS and SRTP encryption ensures secure calling. 4.2 MOS Score backed by 99.995% uptime.


Modern Enterprise VoIP Trunking Reduces Call Costs

Enterprise SIP trunk software with unlimited channel capacity and local caller ID guaranteed in dozens of countries. Scale up or down automatically and only pay for what you use. No setup fees, minimum contracts, or ridiculous add-on fees. You can even get paid to port your existing numbers to AVOXI!

How Much Will Enterprise SIP Trunk Software Save You?
See Our Global VoIP Rate Sheet.

Award-Winning Enterprise SIP Trunk Provider Trusted Everywhere

AVOXI’s all-in-one platform delivers everything you need to successfully run and manage your global cloud communications. Expect the best from your enterprise SIP calling software.

Contact Center Awards
Contact Center Awards

Award-Winning SIP Trunk Provider Trusted Globally

AVOXI’s all-in-one platform delivers everything you need to successfully run and manage your global cloud communications. Expect the best from your SIP service provider.

Leading Brands Choose AVOXI

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Buying Phone Numbers in Bulk?

Ask us about AVOXI Flex, our flexible SIP trunk solution for enterprises

and wholesale partnerships. Buy and provision phone numbers in bulk with

phone number APIs and enjoy wholesale SIP trunk rates globally. 

Buying Phone Numbers in Bulk?

Ask us about AVOXI Flex, our flexible SIP trunk solution for enterprises

and wholesale partnerships. Buy and provision phone numbers in bulk with

phone number APIs and enjoy wholesale SIP trunk rates globally.

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Enterprise Outbound SIP Calling

Enterprise SIP Trunking Platform Powered by Local Connection Points

  • Reliable SIP Calling to 190+ Countries

    Make outbound calls wherever business is done. Local call termination points in dozens of countries ensures local caller ID during outbound calls.

  • Unlimited SIP Trunk Capacity

    Stop paying per SIP channel. AVOXI's enterprise SIP trunking platform includes unlimited concurrent calling anywhere it's available at no extra cost.

  • 2-Way Calling with Local Caller ID

    AVOXI's network is optimized with local voice connections around the world. That means crystal-clear call quality and outbound CNAM that works every time.

Enterprise Inbound SIP Calling

Intuitive Number Management with Carrier-Grade VoIP Origination

  • Manage Phone Numbers at Scale

    Instantly provision phone numbers from 170+ countries, configure forwarding rules in bulk, and manage multiple carriers' numbers from one intuitive interface. 

  • Call Tracking & VoIP Service Monitoring

    Take caller experience to new levels with advanced call routing and analytics. Track call trends over time, monitor SIP trunk connections with Call Insights Dashboard, automatically upload call logs into your CRM or helpdesk, and more.

  • Bulk Number Management & Migration

    Buy DID numbers in bulk and provision or cancel numbers instantly. Get paid to port existing numbers to AVOXI or manage multiple carriers in our platform with BYOC. 

Expecting High Call Volumes?
See If You Qualify for Partner Discounts.

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Our equipment is housed in tier 4 data centers with multi-factored, physical security

Zero Down Time (ZDU) + database replication across all regions allows AVOXI to move traffic quickly to subset of devices

Strong broadband network across data centers, including multiple internet service providers with automatic failover

Global VoIP Network

Next-Level Fraud Protection and Traffic-Monitoring

  • Highly-Reliable VoIP Service Network

    AVOXI consistently scores above the global standard for "excellent" call quality, backed by 99.995% uptime. 

  • Secure, Compliant Enterprise SIP Calling

    Your enterprise VoIP calling software is protected by TLS and SRTP encryption, real-time traffic abnormality alerts, proactive fraud monitoring, and a network optimized to avoid packet loss.

  • Redundant Network Backed by Award-Winning Support

    True network optimization doesn't stop with hardware and infrastructure. Our resilient global network is backed by the most reliable support team in the industry, available 24/7/365. 

Customer Reviews

Don't just take our word for it. See why thousands of businesses trust AVOXI as their SIP trunking platform.

"Easy to use, great customer support, and reasonable pricing
that can be customized according to usage."
Patricia Neo
Hyatt Corp

"In comparison to other similar services existing on the market
AVOXI definitely makes a difference on every level.”
Capucine Golicheff
BNP Paribas

”The interface is easy to use and very user friendly,
our teams required very little training to get started right away.”
Marco Rinalducci
Argos Assistance

"AVOXI makes it easy to add/remove user licenses, easy to set up call routing, virtual attendants and is very scalable without the need for large capital investments."
Andy Dao
Crown Worldwide

"AVOXI support and sales agents always take time and patiently walk us through our questions and issues. Unlike some providers who often just brushed off "silly" questions and don't bother to address each question or query raised."
Wey Jing Ho
World Link Communications

"Easy to use, great customer support, and reasonable pricing that can be customized according to usage."
Patricia Neo
Hyatt Corp

"In comparison to other similar services existing on the market AVOXI definitely makes a difference on every level.”
Capucine Golicheff
BNP Paribas

”The interface is easy to use and very user friendly, our teams required very little training to get started right away.”
Marco Rinalducci
Argos Assistance

"AVOXI makes it easy to add/remove user licenses, easy to set up call routing, virtual attendants and is very scalable without the need for large capital investments."
Andy Dao
Crown Worldwide

"AVOXI support and sales agents always take time and patiently walk us through our questions and issues. Unlike some providers who often just brushed off "silly" questions and don't bother to address each question or query raised."
Wey Jing Ho
World Link Communications

Enterprise SIP Trunk Software FAQs

Deploy enterprise SIP calling software and start managing calls in a matter of minutes when you buy a SIP DID number online! For enterprise SIP trunk solutions, we recommend speaking with one of our experts for complete solution details and pricing, and so we can account for custom requirements with your service. 

There are no additional costs to set up enterprise SIP trunking in the AVOXI platform, you only pay for your numbers and the calls you make. Wholesale VoIP rates are available for enterprise and resellers with large call volumes. Speak with an expert for A-Z SIP trunk rates. 

Yes! For guaranteed outbound caller ID, choose any number labeled "TrueLocal" in the shopping cart. TrueLocal numbers are 2-way SIP trunk numbers with local origination and termination, ensuring caller ID works as intended every time. 

Outbound caller ID may work even when using numbers not labeled TrueLocal. However, we can only guarantee proper CNAM when using TrueLocal numbers.

Yes! Our SIP trunking platform is a perfect alternative to International Calling Plans in Teams.

AVOXI's dedicated Direct Routing solution includes a built-in, Microsoft-approved SBC solution for a seamless configuration experience. 

In addition to Microsoft Teams, AVOXI's enterprise VoIP SIP software work with virtually any phone system setup. 

For more information, see how to configure SIP trunks. Options for system-specific configuration instructions are included at the bottom, including: 

  • 3CX SIP Trunk Configuration
  • FreePBX SIP Trunk Configuration
  • Twilio SIP Trunk Configuration
  • Asterisk SIP Trunk Configuration
  • Five9 SIP Trunk Configuration
  • Talkdesk SIP Trunk Configuration
  • Genesys SIP Trunk Configuration

AVOXI provides SIP trunks with unlimited concurrent calling in dozens of countries at no additional charge. Outbound calls are charged per-minute. Per-minute rates or bundled call packages are available for inbound calls. 

In addition to the best enterprise SIP trunking platform and VoIP services available, popular solutions from AVOXI include cloud contact center software and phone number porting.

Try the Most Reliable Enterprise SIP Trunk Platform Today

Look around the AVOXI platform and see what a truly modern enterprise SIP trunk solution can do.