VoIP popularity is growing and cable operators are well positioned to play a major role as VoIP providers thanks to the PacketCable™ project, which leverages the existing cable infrastructure by building the VoIP architecture on top of the established DOCSIS cable network.

This new network introduces challenges that network operators and network equipment manufacturers will face to ensure network readiness for planned traffic volume, security, QoS and interoperability. The call management server (CMS) is responsible for traffic security and QoS management, and plays a crucial role in PacketCable VoIP network.