Elastix [SEP] license
) based on the SIP (Session Initiation Protocol) standard. It enables extensions to make calls via the public switched telephone network (PSTN) or via Voice over Internet Protocol (VoIP) services. Elastix 5.0 is an IP business phone system that supports standard SIP soft/hard phones, VoIP services and traditional PSTN phone lines.
Elastix 2.5 is free software, released under the GNU General Public License.
Elastix 5.0 is Proprietary released under the terms of the 3CX license.
Support for telephony hardware.
Elastix
List of SIP software
This list of SIP software documents notable software applications which use Session Initiation Protocol (SIP) as a voice over IP (VoIP) protocol.
Servers.
Servers Free and open-source license.
- Asterisk
- Cipango SipServlets 1.1 application server
- FreeSWITCH
- FreePBX
- GNU SIP Witch
- Issabel, fork of Elastix
- Kamailio, formerly OpenSER
- Mobicents Platform (JSLEE[2] 1.0 compliant and SIP Servlets 1.1 compliant application server)
- Mysipswitch
- OpenSIPS