GNU SIP Witch is a pure SIP-based office telephonecall server that supports generic phone systemfeatures like call forwarding, hunt groups andcall distribution, call coverage and ring groups,holding, and call transfer, as well as offeringSIP specific capabilities such as presence andmessaging. It supports secure telephone extensionsfor making calls over the Internet, andintercept/decrypt-free peer-to-peer audio andvideo extensions. It is not a SIP proxy, amulti-protocol telephone server, or an IP-PBX, anddoes not try to emulate Asterisk, FreeSWITCH, or Yate.License: GNU General Public License v3Changes:
Introduction of call statistics and a formal SNMP "MIB" for alarm traps and notifications for telephony services. Support for shell and CGI query of server stats, along with periodic collection and rollover of call stats. Enhanced IPC services for extracting server internals to external processes.