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Our company was founded on two guiding principles:

  • Sell a high quality product
  • Back that product up with exceptional technical support and customer service

In other words, we don’t just support the product... support IS the product.

Popular Articles


  • FreePBX November 16th, 2017 FreePBX The "Free" Stands for Freedom FreePBX is a web-based open source GUI (graphical user interface) that controls and manages Asterisk (PBX), an open source communication server. Free...

  • All of the ATAs listed in our interop guides have passed our QA tests, but here are three popular models: Grandstream HT812 Obihai OBi302 Cisco SPA122

  • The Grandstream GXW4200 series FXS Gateways provide a unique featureset, catering to very specific deployment requirements. Up to 48 FXS Ports, model dependant, allowing for SIP registration individually at the port level, or yo...

  • Grandstream’s HT series of Analog Telephone Adapters (ATAs) offer a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The HT704 is a 4-port FXS, wit...

  • Grandstream's HT series of Analog Telephone Adapters (ATAs) offers a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The HT812 is a 2-port FX...

  • Grandstream's HT series of Analog Telephone Adapters (ATAs) offers a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The HT818 is an 8-port F...

  • Grandstream's HT series of Analog Telephone Adapters (ATAs) offers a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The HT814 is a 4-port FX...

  • Grandstream’s GXW4000 series of gateways offer a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The GXW4004 is a 4-port FXS gateway, with 10/100...

  • Grandstream’s GXW4000 series of gateways offer a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The GXW4008 is a 8-port FXS gateway, with 10/100 ...

  • T38Fax owns AS7324, and all of our services operate out of the 8.34.182.0/24 address block. Ports 5060 and 5080 are for SIP. Use of the non-standard port 5080 is recommended, and discussed in more detail here. The other ports mentioned...

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