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Mura
tee
Digital Facsimile
Unlike analog systems that scan every portion of a page, digital fax machines
survey a
page
's
overall picture
content.
Digital fax machines scan a line and con-
vert the information into a binary code of zeros and
ones.
The fax machine can
take
this
information
and compress
it,
providing transmission speeds of less than
one
minute per
page.
Muratec
units
offer the standard Group 3 data compression
method for rapid transmissions to any other Group 3 fax machine,
and
many
Muratec
units
offer proprietary transmission speeds for faster transmissions be-
tween
Muratec
units.
DIP Switches
Dual In-line Package switch. A
two-position on-off
switch. Many Muratec fax
machines
include DIP switches
-
in
these operating instructions, we call them
simply "memory switches"
-
to control optional
settings
or features
.
DTMF
Dual tone, multiple frequency. The dialing signals generated
by
push-button or
Touch-Tone
(a
registered
trademark of Western Electric) telephone systems.
DTMF
service
is
an option
in most
North American
telephone
systems.
ECM
Error Correction
Mode.
A CCITT-approved feature for Group 3 fax
machines.
ECM transmission sends document
image
data in blocks and retransmits each
block until received properly by
the receiving
unit.
Effective Printing Width
The
widest
image
that can be
printed
on your fax. The effective width can be
in-
fluenced by
the
CCITT group of the unit transmitting to your fax machine.
Effective Scan Width
The
maximum width
the
scanner
in
your fax
can
scan during
transmission.
Facsimile
Although business fax
use has grown
rapidly since the advent of fast, powerful
Group 3
units,
facsimi le communication
itself has
a surprisingly
long
history
.
The first facsimile system
was introduced in 1842,
and wide-spread service
was
underway before
1910.
In the
United States, fax
units
attached
to home
radios
provided
facsimile
newspaper
service
in
several cities through
the late
1940s.
The
growing success
of
fax for
news
transmission was
halted, however,
by
the
development
of
commercial television.
Fall back
Group 3 fax machines
operate
at
the highest
transmission
speed
possible
on a
given
telephone line.
Muratec systems offer automatic fallback, so if line quality
drops during transmission
your fax machine will
reduce speed to
the fastest
pos-
sible
level.
68
Operating Instructions
Fax Number
The Fax Number is your unit's telephone number. Part of the TTI, your Fax
Number
is
printed
at
the top of each page received from your unit. See also
Subscriber
ID
.
Fax Report
A fax report is your assurance that the
document
you transmitted was
received.
The report prints after your transmission. It identifies the receiving unit and
records the date, time, number of pages sent, and result.
G3, Group 3
CCITT Group 3. Your machine is a Group 3 fax. Group 3 compatibility
is
the
modem standard for worldwide communication as determined
by
the CCITT.
Group
4
A CCITT standard for capturing, processing, communicating and outputting all
forms of data. Group 4 will be used for extremely
high-volume
fax communica-
tion in coming years, but the expense of leased,
dedicated digital telephone lines
will continue to make Group 3 fax
the best
choice for
millions of
fax owners.
Grayscale
Not
a
level
of resolution, but a method of scanning and transmitting halftone
im-
ages. Muratec 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.
Handshaking
Used by telecommunications and computer equipment to
"introduce"
two
sys-
tems to each other. Facsimiles
use
a
handshaking
protocol,
for example, to
identify the type of
unit
and
to
begin fax communication.
Hz
Hertz. A measure of frequency equal to one cycle per
second.
Used in the
specifications for your fax, it
identifies
the AC
power
your unit requires. Call
your electrician
if you
don't
know the
specifications of your office outlets.
LCD
Liquid
crystal
display. Used on some Muratec
units
for status
displays.
LED
Light-emitting diode
.
Used
on
some Muratec units for
displays
and
lamps.
Load Number
A
number
assigned to
telecommunications
equipment
used in Canada and
designed to
prevent overloading on a
telephone
circuit.
Read the
Canadian
Department
of
Communications information in
your operating
instructions
or
call
your
local telecommunications
company for
more information.
Mura
tee
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