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RESEARCH AND FACTS ON - Open Source VoIP Apps & Resources


Pankaj Bhagchandani

When a body of independent auditors and experts recommended that the State of California consider open-source software and Voice over Internet Protocol telephony (VoIP) as two measures to cut costs in 2004, that was the signal that open source and VoIP should unite. After all, what’s better than free software? Open source projects in other fields like medicine have revolutionized the tools used in ultrasound,  x-rays, surgery, radiology and even data. Why can’t the same happen with communications? (Hint: it can.) Open source is better, because you have access to the code. What’s better than open source? Open source that’s focused on VoIP. That’s what you get here — 74 open source apps tucked into categories that you can use “as is” or change to fit your specific VoIP needs.

The following apps and resources are categorized by SIP, H.323, IAX, and RTP protocols and include clients, libraries, gatekeepers, and any other open source resource available for those specific protocols plus PBX and IVR platforms. You’ll also find tools like faxware, voicemail apps, and middleware that applies to one or more of the previously mentioned protocols.

 

H.323 Clients (User Agents)

VoIP traditionally uses H.323, a rather complicated protocol that uses multiple ports and a binary code for data. But apps like FreeSWITCH make H.323 seem like a piece of cake with its all-in-one application. The following H.323 clients are broken down into Multiplatform, Linux, MacOS X, and Windows.

 

H.323 Gatekeeper

  1. OpenH323 Gatekeeper – The GNU Gatekeeper (GnuGk) is a full featured cross-platform H.323 gatekeeper, available freely under GPL license.

H.232 Radius Platform

  1. BSDRadius – While there are quite large number of Radius servers (including free) available in the world, little number of them (if any) are developed with VoIP specific needs in mind. BSDRadius is a RADIUS – compliant AAA (Authentication, Authorization, Accounting) server with CHAP-password authentication for H.323. Platform-independent, but has not been tested on Windows.

 

 

 

 

  
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