Voice over IP (VoIP)

The main focus of this website is Voice over IP or VoIP for short. This section concentrates on the open source PBX Asterisk and specifically the PBX in a Flash distribution because that's what I'm most familiar with. Asterisk is not the only player in the VoIP world, there are many others open source and commercial PBXs. Voice over IP PBXs belonging to FreePBX, Cisco, 3CX, FreeSwitch and Shortel will be discussed briefly here.

What is VoIP?

The VoIP section is divided into the following areas:

PBX in a Flash - This section details the configuration, structure and usage of the PBX in a Flash (PiaF) distribution of the Asterisk open source PBX platform.

FreePBX - This section details the FreePBX GUI and management tool used by many Asterisk based PBX distributions including PiaF, FreePBX's own distribution and spin offs such as Elastic and Trixbox.

Cisco Call Manager Express (CCME) - This is Cisco's commercial entry level PBX that runs on their line of integrated service routers (ISRs) such as the 2811 series. These pages detail the configuration of the CCME and the Cisco Unity Express (CUE) auto attendant and voicemail server.

3CX PBX - This PBX is both a free and commercial VoIP PBX that runs on the Windows XP and Windows 7 platform. This is a nice alternative if you are not familiar with Linux and are more comfortable with the Windows environment.

ShoreTel - They are a commercial offering and have a very interesting and unique architecture in the VoIP market. They use scalable VoIP appliance switches which makes it initially appear more expensive but offers many advantages.

FreeSwitch - This is the new kid on the block compared to the others. This is a ground-up re-architecturing of a PBX created by a former core developer of Asterisk. It has great potential but doesn't have the ground level developer support compared to Asterisk. It is doing some very interesting things.

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Copyright July 2013 Eugene Blanchard