Abstract: The present invention discloses a system and method for securing a telephone system comprising a circuit switched network and an IP data network. The system comprises a first firewall, between an internal IP data network and an external IP data network, for protecting the internal IP data network against intrusion; a second firewall, between the internal IP data network and a circuit switched network, for preventing intrusion originated in the external IP data network into the circuit switched network; a third firewall for protecting voice-over-IP phones against intrusion from the external IP data network; intrusion detection system (IDS) probes and time-division multiplexing (TDM) voice probes for extracting information about voice-over-IP calls over the internal IP data network; a Session Initiation Protocol (SIP) proxy server for managing voice-over-IP call control signals; and a security supervisor for managing the operation of the firewalls and the IDS and TDM voice probes.

Abstract: A system identifies and forwards a first and a second data sequence to a communications network based on Quality of Service (QoS) requirements. The system includes a protocol database for storing a protocol, a proxy module for analyzing first Open Systems Interconnection (OSI) headers of the first data sequence based on the protocol. The first OSI headers includes headers of layers 5 through 7, a connection database for storing connectivity information about the second data sequence obtained from the content of the first data sequence by the proxy module, and an ID tagger for analyzing second OSI headers and tagging a unique ID to the first and the second data sequences. The second OSI headers include headers of layers 3 through 4. The first and the second data sequences are forwarded to the communications network configured to support QoS requirements of the first and the second data sequences.