Cablevision (NYSE:CVC) says its Optimum Voice SIP Trunking has been certified with the latest firmware release from 3CX. The pre-certified solution is intended for businesses that want a software-based IP PBX system while avoiding the costs of an analog gateway or traditional T1.

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. It is delivered through a converged voice and data network with 24/7 support.