IP based products that interface analog phones, legacy PBX systems with IP networks, giving users the advantages of low-tariff Internet Telephony for international and long distance calls. With the SIP based VoIP ATA, normal telephones can be used to make and receive VoIP calls. The feature-rich Multi-port VoIP to FXS Gateway offers IP connectivity with excellent audio quality for analog phones, legacy PBX systems and analog faxes. The feature-rich, VoIP SIP phone provides intuitive operation for all call management functions. It is compatible with any SIP infrastructure like Soft Switches, IP PBXs, Registrars and Proxies.