DESC: The MultiModemZBA corporate user modems provide high-speed data transfer and fax capabilities for small businesses, telecommuters, and SOHO users. All serial models feature callback security and operate over dial-up or two-wire leased lines. ??The MultiModemZBA family provides powerful features that make it perfect for business use. All models support Caller ID reporting and remote configuration. Serial port models also feature callback security, DTR dialing, and 11-bit operation. The voice model supports full-duplex speakerphone operation so you and a caller can talk and listen at the same time - without cutting each other off. The bundled software for these modems has an easy to use graphical interface for use under Windows.