■ V S B C The VoIP industry needs a simple and speedy mechanism to deploy CPE (Customer Premise , so that VoIP can be marketed and accepted quickly. How to get VoIP users behind firewall/NAT of various network environments up and running has long been a challenge for the service providers and equipment vendors. Several standard institutes and equipment manufacturers put forth their solutions. Voipack, with rich experience in telecommunication and high R&D capability, brings forward an excellent solution. By relaying signaling and media, SBC (session border controller) helps to penetrate firewall/NAT without configuration. Such solution not only resolves the firewall/NAT penetration problem for SIP, MGCP protocol, but also fulfills the QoS and safety requirement demanded by enterprises and service providers. SBC relieves the processing load and configuration need of the firewall to run VoIP application. Also, SBC is able to camouflage the internal network topology from outside, therefore prevents the network topology and IP addresses from getting known to the public or unauthorized parties. Product Features: 1. SBC enables end user terminals of SIP and MGCP protocol to penetrate firewall and NAT servers. No need to configure or restructure firewall and NAT server. 2. Topology camouflage --SBC Fends off DoS attack 3. Lawful Interception.　 Service providers are required by government to provide lawful interception. SBC is the subsystem that helps VSS to fulfill such requirement.