SIP Trunking for FreeSWITCH

Use SIP Trunk from DIDforSale with FreeSWITCH to build a scalable and powerful phone service!

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FreeSWITCH is a scalable open source cross-platform telephony platform designed to route and interconnect popular communication protocols using audio, video, text or any other form of media. The open source FreeSWITCH platform is used by businesses and developers of all sizes in both public and private sector to build communication applications.


SIP Trunks from DIDforSale are fully compatible with FreeSWITCH. DIDforSale provides complete support in configuration of SIP Trunk and FreeSWITCH.

A brief architecture of the big picture will help you understand what role will FreeSWITCH play in your communication application?

FreeSWITCH is also commonly referred to as PBX (Private Branch Exchange). However PBX is just one of the many applications that can be built with FreeSWITCH. When using FreeSWITCH the calls sent to you by your phone provider are forwarded to FreeSWITCH PBX. Then from there the switch determines how to route the calls.

Frequently Asked Questions on How to get started with Freeswitch?

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Where can I download FreeSWITCH from?

You can download the latest version of FreeSWITCH by visiting the official site for FreeSWITCH at, and then simply follow the instructions for installation.

How many concurrent calls can FreeSWITCH support?

There is no correct figure. It depends on what type of application you want to run on FreeSWITCH.
Does FreeSWITCH need to stay in media, does it need to do transcoding? If you follow FreeSWITCH mailing list you will find people using up to 1000 calls on one system.

Can we interconnect FreeSWITCH with any other SIP servers?

Yes, FreeSWITCH can be interconnected with any SIP server. DIDforSale SIP trunk can be connected with FreeSWITCH in less that 5 minutes.

Can I record my calls on FreeSWITCH?

Yes , FreeSWITCH provides application to record your calls. record_session, recordFile are a few examples.

Can I run FreeSWITCH behind NAT?

Yes, FreeSWITCH can run behind NAT.

What server configurations are required for FreeSWITCH?

This depends on the type of application you run with FreeSWITCH. FreeSWITCH can run even on a Rasberry Pie.

What are the operating systems supported by FreeSWITCH?

FreeSWITCH can be installed in all Linux distributions, FreeBSD, OpenBSD and Macintosh OS X and Windows. Debian is the preferred platform for FreeSWITCH and is recommended by developers.

Will I get a graphical user interface (GUI) for FreeSWITCH to do the configuration?

FreeSWITCH doesn’t have a graphical user interface by default. FusionPBX is one of the popular GUI interface for FreeSWITCH.

FreeSWITCH vs Asterisk, FreeSWITCH vs FreePBX, which is better?

FreePBX is built on top of Asterisk. So basically its Asterisk vs FreeSWITCH. People are suing our SIP Trunking service on both the platforms. Both the platforms are very mature and have very strong support from community. One might be better than the other depending upon what you are using it for. So it all depends on your expertise and what you want to build.

What VoIP phones can be used with FreeSWITCH SIP Trunk?

All SIP IP phones, soft phones or mobile applications can be used with FreeSWITCH.

If I buy service from DIDforSale, will you help me configure the system?

DIDforSale provides technical support to configure and setup your FreeSWITCH system. We not only help you with the setup, we can also make recommendations based on your needs.

DIDforSale provides FREE technical support for their FreeSWITCH customers!