Asterisk, is the most famous free PABX software on the planet to build unified telephone communications solutions. Asterisk free PABX software can turns a computer / server into IP PBX systems, VoIP gateways, conference servers and other custom telephone communication solutions by utilising Session Initiation Protocol (SIP) and other telephone standard protocols.
What is PABX ?
Short for Private Automated Branch Exchange, a telephone network is commonly used by call centres and other organisations PABX allows a single access number to offer multiple lines to outside callers while providing a range of external lines to internal callers or staff. PABX performs all the switching necessary for making internal calls between extensions within the organizations. It also allows provides a connection between extensions and external phone lines.
Do you know that there are other free PABX Software or free VoIP software also do the same telephone communication functionality similar like Asterisk. Let us introduce some of best free PBX software that available.
Free PABX Software List:
Kamailio SIP Server
Kamailio also formerly known as OpenSER, which it’s a powerful free PABX software can be used to build large VoIP servicing platforms or to scale up SIP-to-PSTN gateways, PBX systems or media servers and handle thousands telephone call setup per second.
Kamailio PABX software is written in PERL language and support various backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra; XMLRPC control interface, SNMP monitoring.
Meanwhile, this free PABX software also come with Java API which can be used to extend VoIP services and integrate with Web services like instant messaging services. Plus more, there are also PABX Failover and PABX redundancy features also included.
Unfortunately, there are no GUI setup page, which you need to have basic knowledge of Linux administration and networking setup for Kamailio free PABX system. Here is a nice tutorial how to setup Kamailio
FreeSWITCH is another free PABX software to designed to route and interconnect popular communication protocols using audio, video, text or any other form of media from a soft telephone to a soft telephony switch.
FreeSwitch can used as either simple switching engine, a PABX, a media gateway or a media server to host Interactive Voice Response (IVR) applications, using simple scripts or XML-RPC to control live calls. Meanwhile, FreeSwitch also supports Skype, Session Initiation Protocal (SIP), Skinny Client Control Protocol (SCCP), H.323, IAX2 and GoogleTalk, making it possible to interface with other open source PABX systems like sipXecs, CallWeaver, Yate or Asterisk.
FreeSwitch also supports various operating systems including Windows, Mac OSX, Linux, BSDs and Solaris.
SipXecs – Web Based Free PABX Management Software
sipXecs is a modular and scalable communications PABX solution or Free IP PBX solutions for all enterprise sizes. It provides web PABX management with comprehensive FreePBX functionality like voicemail, unified messaging, auto-attendant, conferencing, presence and call center capabilities.
sipXecs strong point is their high availability centralised management of a distributed system and P2P routing, which promises better voice quality, unlimited simultaneous calls while also avoiding the PABX becoming a single point of failure.
SipXecs project has been started from 2004 based on a code contribution from Pingtel. The release 4.0 was made public in May 2009. Its flagship reference site is Amazon.com, which uses sipXecs for its more than 6000 employees worldwide.
Axon Virtual PBX – Free Windows Free PABX Software
Axon Virtual PBX is a Windows Free PABX software designed to manage for any range of business phone call or call centre calls. Windows PABX software can be simple installed on any computer and handle 64 telephone line calls and unlimited internal telephone extension. It work as Free VoIP PBX Windows software fully featured telephone switch connecting to phone lines and extensions using state-of-the-art VoIP technology.
However, the free version of Axon Virtual PBX is capable to handle 10 telephone extension. If you wish to have more extensions, you’re required to upgrade to Axon Plus which features unlimited extensions and external lines.
3CX Phone System – Free Windows IP PBX Software
3CX Phone System is another famous free Windows VoIP PBX that allows any Windows administrator to setup a professional modern business telephony system easily. it is easily managed without any specific tele-communication or Linux skills.
3CX Phone system has been preconfigured to work with popular IP Phones, VoIP Gateways and SIP trunks saving you the hassle of having to configure and manage these telephony devices. Plus more, it also includes enterprise phone system features such as voicemail, auto attendant, fax server, unified communications and more.
3CX Phone System FREE edition is a fully functional product – it supports an unlimited number of extensions and does NOT time out
Share with us, if you know other free PABX software should include on the above list.