Skinny Client Control Protocol (SCCP) is a Cisco proprietary standard for terminal control for use with voice over IP (VoIP). The SCCP was originally developed by Selsius Corporation. The term "skinny" reflects that SCCP is a simple and uncomplicated ("lightweight") protocol requiring relatively little computer processing.
With Cisco's version of Skinny Client Control Protocol, the end stations in a network, which can be VoIP phone sets or personal computers with VoIP capability, run a program called the Skinny Client. The lightweight Skinny Client helps to minimize the cost and complexity of VoIP end stations. The H.323 call setup processing is done by a proxy known as the Call Manager. The audio communication between end stations makes use of the User Datagram Protocol (UDP) and the Internet Protocol (IP). Variants of SCCP are used by several companies other than Cisco.
SCCP also stands for Signalling Connection Control Part, a telephony protocol that is part of Signalling System 7.
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