SCCP Support in ScreenOS Devices Overview

Skinny Client Control Protocol (SCCP) is supported on security devices in Route, Transparent, and Network Address Translation (NAT) modes. SCCP is a binary-based Application-Layer protocol used for voice over IP (VoIP) call setup and control. In the SCCP architecture, a Cisco H.323 proxy, known as the CallManager, does most of the processing. IP phones, also called end stations, run the Skinny client and connect to a primary (and, if available, a secondary) CallManager over TCP on port 2000 and register with the primary CallManager. This connection is then used to establish calls coming to or from the client.

The SCCP ALG supports the following features:

Related Documentation