MAX Phone - Version 1.2 MAX Phone is expanding the soft phone experience by making it even easier for users to make VoIP (Voice over Internet Protocol) and Video over IP calls. MAX Phone supports SIP industry standard, and is fully inter-operable with any RFC SIP 3261 compliant servers.MAX Phone delivers SIP-based communications and services for PC-to-Phone, Phone-to-PC and PC-to-PC services.Standard Telephone Features:MAIN Telecom Multimedia Communicator MAX Phone has all the standard telephone features, including:* 4 lines with ability for extension. * Caller ID. * Call rejection. * Call waiting.