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A fax modem is similar to a data modem but is designed to transmit and receive documents to and from a fax machine or another fax modem. Some, but not all, fax modems do double duty as data modems. As with other modems, fax modems can be internal or external. Internal fax modems are often called fax boards. In the early 1990s small business PCs ...
Computer modems are often designated by a particular fax class, which indicates how much processing is offloaded from the computer's CPU to the fax modem. Class 1 (also known as Class 1.0) fax devices do fax data transfer, while the T.4/T.6 data compression and T.30 session management are performed by software on a controlling computer.
SupraFAXModem 144 LC modem (1996) Sticker on bottom of SupraFAXModem 144 LC modem The SupraFAXModem 14400 is a v.32bis modem . When it was launched by Supra, Inc. in January 1992 for US$399 (equivalent to $870 in 2023), [ N 1 ] the 14,400 bit/s model was less expensive than most existing 9600 bit/s models.
As shown in the diagram below, a T.38 gateway is composed of two primary elements: the fax modems and the T.38 subsystem. The fax modems modulate and demodulate the PCM samples of the analog data, turning the sampled-data representation of the fax terminal's analog signal to its binary translation, and vice versa.
Fax modems can be used for computer-based faxing, in which faxes are sent and received without inbound or outbound faxes ever needing to ever be printed on paper. This differs from efax , in which faxing occurs over the internet, in some cases involving no phone lines whatsoever.
U.S. Robotics Sportster 14,400 Fax Modem (1994) The proprietary nature of HST allowed USR to maintain its market predominance even when off-brand V.32-based modems began selling for less than equivalent HST modems. As the price differential decreased, however, V.32-based modems eventually became a cost-effective alternative to HST.
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