Muratec MFX-1500 User Manual download pdf (Page 137)

Just in case . . .

3.19

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

— to describe everything, so that

means

off

and

means

; 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

203

x 196

lpi. Also shown as

(“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

group 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

power the unit requires.

ITU

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

when communicating

with other Group 3 units.

ITU

Test Document 1

Also called the

Slerexe

(“

slehr-rehks

”)

letter

; sometimes erroneously called

ITU

Test Chart 1

. An

ITU

standard document with a known black density which fax

makers often use in testing, and subsequently publicizing, the transmission speeds

of their fax machines.

ITU

.29 and

.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

— See

Station

lpi

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

Normal resolution

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