Cisco’s Skinny

Cisco’s Skinny

Cisco’s Skinny Call Control Protocol (SCCP) is used in Cisco’s Cisco Unified Communications Manager, (formerly know as CallManager) - a proprietary protocol between the CallManager and their VoIP phones.

 

The CallManager acts much as a SIP UAS or UAC – while the physical/software “phone” mainly deals with the call content, with the audio carried via RTP over UDP.

Skinny messages use TCP port 2000^†

Skinny was originally developed by Selsius Corporation.

 

^†The message types formerly could be found at http://www.javvin.com/protocolSCCP.html.

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Transcript

[slide540] Cisco, prior to their introduction of their own system, bought a company called Celsius Communications. And they implemented a very, very simple protocol that later evolved into their call manager protocol.