SIP Trunking


Upgrade Your Existing System

Through its ability to use existing high-speed data connections for voice communications worldwide, cloud-based G12 SIP Trunking helps organizations minimize the cost of implementing a new IP-based communications system or maximize the value of an older system when a SIP PRI is configured. As a leading SIP Trunking provider, G12’s SIP Trunking solution delivers an array of features that help keep on-going communications costs low and call quality, reliability, and security high.

Stop wasting time and money on technology. Let’s get started


Monitor, analyze, and respond to changes that occur on your IP Network

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    PBX Integrations

    Leverage an existing PBX investment with the addition of SIP trunks as needed; requires no dedicated T1 or MPLS data link, simply an Internet connection.

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    Fully Encrypted

    Route communications securely over existing corporate Internet and data connections for both signaling and media channels.

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    Disaster Recovery

    Support multiple IP circuits and presetting failover routes for DID or toll-free numbers, critical for call centers, single-sites, and multisites.

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    911 Support

    Support for 911 and E911 calling where available, multisite and remote-site E911.


G12 Advanced SIP provides a unique range of benefits

Years experience


Years experience
Certified integrations


Certified integrations
End user satisfaction


End user satisfaction
Global reach


Global reach
Service desk


Service desk
  • Control Costs

    Aggregate multiple sites and legacy PRI’s into a single location to reduce your overhead and save money month after month.

  • Expand Your Reach

    G12 provides your business with nationwide communications access and coverage in 60+ countries around the world.

  • Instantly Scale

    Quickly increase call capacity with the click of a button and instantly port new numbers into Advanced SIP Trunks.

  • Boost Productivity

    Spend less time fixing hardware and network issues with 99.999% uptime and continually updated G12 software and hardware.

  • Customer Service

    G12 uses locally-based customer service teams to quickly answer your questions and solve any issues you may encounter.


Seamless technology integrations

G12 Advanced SIP Trunking is also flexible. It interoperates transparently with Microsoft Lync, Avaya, Mitel, Cisco, ShoreTel, Panasonic, and other major unified-communications platforms and systems. Its global DID footprint supports seamless interconnection among single-site, multisite domestic, and global organizations. In addition, its phone-number inventory in 60+ countries and support for the import of numbers from existing carriers helps organizations to consolidate their telecom infrastructure for major efficiencies and savings.

Stop wasting time and money on technology. Let’s get started

We have been a SIP trunking customer of G12 for over 6 years now and we have found that among the major providers of SIP services in our area, G12 consistently outperforms their competitors. G12 Communications offers customers technical support that is responsive and interested in helping resolve service issues when they arise regardless of the origination of that issue. Without hesitation I would recommend G12’s service to any organization considering a transition to SIP.
Senior Voice Engineer | CCIE Collaboration #58338
Ednetics, Inc.
Why G12?

Here are 4 reasons why you should choose us

  • People

    We take immense pride in our team – from engineering to customer support, we hire the best talent we can find

  • Customer services

    We strive to provide an amazing customer service experience and take pride in our 100% local support team

  • Technology

    Our engineering team works magic – supplying you with the latest cutting-edge technologies and innovations

  • Quality

    We are committed to deliver outstanding communication services that add real value to your business.

Tired of doing business the old way? Let’s get started