Muratec MFX-1500 Delayed command, Digital fax, Effective printing width, Effective scan width

Just in case . . .

Delayed command

Transmission or polling operation set by the user to occur later, automatically, at a predetermined time. Great for reducing costs by making fax calls during times, such as late at night or on weekends, when telephone costs are lowest.

Digital

Using the binary system — i.e., either 0 or 1 — to describe everything, so that 0 means off and 1 means on; digital fax machines convert the graphic image of your document into a series of zeros and ones by using the binary system of transmission to encode black and white occurrences. This increases transmission speed by passing over white spaces. See also White-line skip.

Digital fax

Unlike analogue systems that scan every portion of a document, digital fax machines survey a document’s overall picture content. Digital fax machines scan a line and convert the information into a binary code of zeros and ones. The fax machine takes this information and compresses it, providing high transmission speeds. Many Muratec units offer proprietary method for faster transmission between Muratec-manufactured units (see also MSE, SMSE).

Effective printing width

The widest image that can be printed on a fax.

Effective scan width

The maximum width the scanner in a fax can scan during transmission.

Facsimile (or fax)

A form of communication involving the scanning and decoding of a document into electrical signals and transmitting of the document, over telephone lines to another device which then reconstructs the signals to produce an exact duplicate of the document. Also, a machine that performs such communication.

Fallback

Group 3 fax machines operate at the highest transmission speed possible on a given telephone line. Muratec systems offer automatic fallback; if line quality drops during transmission, the fax machine will reduce speed to the fastest possible level.

Fine resolution

203H x 196V lpi. Also shown as G3F (“Group 3 fine”) on some fax units.

Grayscale

Not a level of resolution, but a method of scanning and transmitting halftone images. Fax machines with grayscale abilities interpret photographs in levels of gray between white and black. The transmitting fax machine must have grayscale ability to send a photographic image accurately, but the receiving machine does not need it to print the image.

Group 3

Refers to fax machines that use digital encoding. These units transmit one page in less than one minute and produce resolution of 203 × 98, 203 × 196, or 203 × 392 lpi.

Halftone — See Grayscale.

Handshaking

A data interchange between telecommunications and/or computer equipment that “introduces” two systems to each other. For example, faxes use a handshaking protocol to identify the ITU-Tgroup of each unit and to begin fax communication.

Hub — See Relay broadcasting.

Hz(or Hertz)

A measure of frequency equal to one cycle per second. Used in the specifications for a fax machine, it identifies the AC power the unit requires.

ITU-T

International Telecommunications Union — Telecommunications Sector.

(Formerly known as CCITT, for Consultative Committee for International Telegraph and Telephone.) A telecommunications forum for member countries of the United Nations; its Study Group XIV established the primary groups for fax equipment, covering communication protocol and transmission. Muratec Group 3 fax machines offer the fastest transmissions allowed by the ITU-Twhen communicating with other Group 3 units.

ITU-TTest Document 1

Also called the Slerexe (“ slehr-rehks”) letter; sometimes erroneously called ITU-TTest Chart 1. An ITU-Tstandard document with a known black density which fax makers often use in testing, and subsequently publicizing, the transmission speeds of their fax machines.

ITU-T V.29 and V.27ter.

A standard set of communication procedures allowing fax machines to talk to all other units adhering to those standards.

Laser printing

A plain-paper printing system. Toner is attached to a charged drum and an image is transferred onto plain paper through electrical currents, then fused with heat and pressure to produce a dry, permanent printout.

LCD

Liquid crystal display. Used on some Muratec units for status displays.

Leased line — See	Private line.
Location ID — See	Station ID.

lpi

Lines per inch. The way fax image resolution is measured. (For example, see Normal resolution.)

3.19