What is "sipxecs"

sipXecs is an open source enterprise communications system. It was initially developed as a proprietary voice over IP telephony server in 2003 by Pingtel Corporation in Boston, MA, and later extended with additional collaboration capabilities in the SIPfoundry project. Its core feature is a software implementation of the Session Initiation Protocol (SIP), which makes it an IP based communications system (IP PBX).

sipXecs is often compared to other open source telephony and softswitch solutions such as Asterisk, FreeSWITCH, and the SIP Express Router, but the design of sipXecs is substantially different from Asterisk and FreeSWITCH.