sipX ECS (Enterprise Communications Server) is an open source voice over IP telephony server. Its main feature is a software implementation of the Session Initiation Protocol (SIP), which makes it an IP based communications system (IP PBX). Featurewise, it is not unlike Asterisk, a very popular open source PBX, but the design of sipX deviates from Asterisk in many ways. Development started in 1999, but in 2004 Pingtel Corp contributed the codebase to the non-profit organization SIPfoundry. It is an open source project since then. Pingtel assets were acquired by Nortel in 2008 and Nortel continued to support the project with several key enhancements and additions. Subsequent to the Avaya acquisition of Nortel in December 2009, Avaya has backed out of sipXecs and SIPfoundry. Former members of Pingtel and Nortel have create a new commercial entity call eZuce, Inc. (www.eZuce.com) to carry sipXecs forward? and provide commercial versions of the software and support. Source code acquired by sipX is available under the GNU Lesser General Public License (LGPL) as well as a commercial offering from eZuce Inc.Читать дальше