Our commitment to open standards ensures SIP trunk compatibility

Before you choose a SIP trunking provider, it’s important to consider the issue of SIP trunk compatibility. In short, you need to choose a provider that is committed to ensuring compatibility with other SIP systems.

GoTrunk is compatible with any open standards communications system based on SIP (Session Internet Protocol). This means you can easily take advantage of powerful and cost-effective solutions developed by the open source community. You are also free to transfer to other SIP trunking providers should you ever wish to, without losing any time, resources or expertise invested in establishing your SIP solution.


Asterisk is one of the world’s leading unified communications solutions. It is a toolkit, built by and for communication systems developers, which manages the process of initiating, maintaining and manipulating calls. Asterisk has been developed, improved and maintained by a worldwide community of more than 80,000 developers and integrators. GoTrunk offers seamless and simple integration with Asterisk. Our worldwide network of IP connections and the advanced features of GoTrunk give you the powerful communications tools you require to take full advantage of Asterisk’s capabilities.


3CX provides a software-based IP PBX developed specifically for Microsoft Windows. It is based on the SIP standard, so you can use any SIP phone. Installation and management are relatively simple and can be achieved using a web-based configuration interface. GoTrunk offers seamless, painless and simple integration with 3CX.


sipXecs provides an open source unified communications solution popular with the small to mid-enterprise market. sipXecs includes a SIP routing core integrated with a suite of communications services such as video calling, voicemail, unified messaging, auto-attendant, conferencing, presence and call centre capabilities. It can be implemented on a single server or across a distributed infrastructure for larger deployments. The solution is managed through a unified web based management application. GoTrunk offers seamless, painless and simple integration with sipXecs.


FreeSWITCH is free and open source communications software providing both voice and messaging capabilities. It provides an application programming interface and includes additional modules that provide telephony applications, such as IVR, PSTN, VoIP, SIP and conferencing. It is licensed under the Mozilla Public License, which is a free software license. GoTrunk offers seamless, painless and simple integration with FreeSWITCH.


FreePBX provides a web-based graphical user interface that controls and manages the Asterisk PBX solution. It is possibly the most widely deployed open source PBX platform in the world. FreePBX is an open source solution licensed under the GNU General Public License. It is included in many other open source SIP solutions including FreePBX Distro and AsteriskNow. GoTrunk offers seamless, painless and simple integration with FreePBX.


Elastix is server software that delivers unified communications. It combines an IP PBX with email, IM, faxing and collaboration capabilities. It also provides call centre software and predictive dialling. Elastix is based on open source projects including Asterisk, FreePBX, HylaFAX, Openfire and Postfix. It is free software and is released under the GNU General Public License. GoTrunk offers seamless, painless and simple integration with Elastix.

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