fax/modem

(redirected from Class 2 fax)

fax/modem

A combination fax board and data modem available as an external unit that plugs into the serial port of the computer or as an expansion card for internal installation. It includes a switch that routes the call to the fax or data modem, and incoming faxes are printed on the computer's printer. Most modern modems are fax/modems.

A fax/modem requires software that generates the fax transmission from typed-in text, a disk file or from a screen image. Fax/modems often transmit a sharper image than a fax machine, which obtains its source material by scanning the page.

Group 3 Service Classes
Group 3 fax/modems provide different levels of processing based upon their service class. Class 1 devices perform basic handshaking and data conversion and are the most flexible because much of the work is done by the computer's CPU. Class 2 devices establish and end the call and perform error checking. There are a variety of de facto Class 2 implementations and one Class 2.0 standard. See fax and Internet faxing.
References in periodicals archive ?
Faster intelligent fax boards offer more capabilities than Class 1 and Class 2 fax modems, and handle more traffic more efficiently than either a Class 1 or a Class 2 fax modem.
4K/9600/4800 bps Fax transmissions), MultiExpress data communications software (for dial-in and dial-out), and MultiExpressFax software (based on industry standard EIA Class 2 Fax modem commands).
Emulation for Class 1 and Class 2 fax modems is also supported via virtual ISDN modems allowing existing modem-based applications to be used over an ISDN line.
All 56K Dualmode models provide high-quality voice mail when used with a soundcard and support both Class 1 and Class 2 fax.
The same port also supports Class 2 fax modem protocols, allowing both stand-alone and network PC faxing from off-the-shelf fax software packages.
The software also supports over 50 Japanese modems and all popular Mac-compatible Class 1 and Class 2 fax modems, including the Apple(R) Express Modem and the AV GeoPort Telecom Adapter.