Muratec F-98 Halftone See Grayscale, Hub See Relay broadcasting, Leased line See Private line

Just in case …

Digital fax — Unlike analog 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 methods for faster transmissions between Muratec-manufactured units (see also MSE, SMSE).

DIP switches — Dual in-line package switch; a two-position on/off switch. Many Muratec fax machines include DIP switches to control optional settings or features.

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.

F-Code— The ITU-Thas created a fax industry standard for using sub- addressing/password-based communications with not only Muratec fax machines but also other manufacturers’ fax machines.

Facsimile (or fax) — A form of communication involving the scanning and decoding of a document into electrical signals and transmitting of the document, over tele- phone lines to another device. This device then reconstructs the signals to produce an exact duplicate of the document. Also, a machine that performs such communica- tion.

Fallback — Group 3 fax machines operate at the highest transmission speed possi- ble 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 × 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 — An exchange of data 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, whose 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; An ITU-Tstandard document with a known black density which fax makers often use to test transmission speeds of their fax machines. Published transmission speeds are also based on this document.

ITU-T V.29 and V.27 ter. — 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.

Load number — A number assigned to telecommunications equipment used in Canada; designed to help prevent overloading on a telephone circuit. See also Ringer equivalence number.

Location ID — See Station ID.

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

MH — Modified Huffman, the standard ITU-TGroup 3 data compression method. A one-dimensional coding scheme that compresses data in a horizontal direction only. A feature of all Muratec fax machines, MH assures transmissions faster than one page per minute when communicating with other Group 3 units, regardless of man- ufacturer. See also MR, MMR, MSE, SMSE.

Modem — Modulator-demodulator. A device that converts digital data, like infor- mation from a fax machine, into an analog signal for transmission over ordinary telephone lines. A modem is included in a fax machine and allows it to be connected directly to a PSTN telephone line.

MR — Modified Read, an ITU-TGroup 3 standard data compression method. A two- dimensional coding scheme that compresses data in both horizontal and vertical directions and allows for faster transmission when communicating with other Group 3 units, regardless of manufacturer. See also MH, MMR, MSE, SMSE.

MMR — Modified Modified Read, an ITU-TGroup 3 standard data compression method. A two-dimensional coding scheme that compresses data in both horizontal and vertical directions and allows for faster transmission when communcating with other Group 3 units, regardless of manufacturer. See also MH, MR, MSE, SMSE.

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