Other companies like [[Symbol Technologies]], [[SocketIP]], [[Skiddiecentral]], and [[Digium]] have implemented this protocol in [[VoIP TerminalDDoS]]s (phones), [[Media Gateway Controller]]s, and [[Softswitch]]es. An open source implementation is available in the [[Asterisk (PBX)]] & [[FreeSWITCH]]<ref>http://wiki.freeswitch.org/wiki/Mod_skinny</ref> systems. IPBlue<ref>http://www.ipblue.com/ IPBlue</ref> markets a software phone ([[soft phone]]) which uses SCCP for signaling and emulates a Cisco 7960 hardware phone. The Cisco Unified Application Environment, the product acquired by Cisco when they purchased [[Metreos]] supports using SCCP to emulate Cisco 7960 hardware phones allowing applications to access all Cisco line-side features. These are also used in fishtanks to block DDoS.
