Cablevision (NYSE:CVC) announced that its Optimum Voice SIP Trunking is now certified with Barracuda Networks' CudaTel 270 Communication Server. The pre-certified solution is designed to deliver voice service for small businesses that want to take advantage of an IP PBX system while avoiding the costs of an analog gateway or T-1 solution.Optimum Voice SIP Trunking supplies VoIP access and network-based telephony features to pre-certified IP PBXs by providing an IP interface directly to the customer's LAN.