Other Implementations
Other companies like Symbol Technologies, SocketIP, and Digium have implemented this protocol in VoIP Terminals (phones), Media Gateway Controllers, and Softswitches. An open source implementation is available in the Asterisk and FreeSWITCH systems. IPBlue 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.
Read more about this topic: Skinny Call Control Protocol