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Maintenance and Troubleshooting
How a Fax Works
Facsimile is a system of sending printed
or other graphic information from one
location to another by producing a copy
or "facsimile" of that information at the
remote location. A fax unit transmits audio
tones over the same telephone lines you
use for person-to-person conversation.
The facsimile process involves three basic
steps :
1. Reading and converting the document
into electronic signals (audio tones).
2. Sending, or transmitting, the signals
through a telephone system to another
fax unit.
3. Converting the received signals into a
the
transmitted
" f a c s i m i l e " o f
document.
This is a simplified explanation of the
actual facsimile process. Although all fax
units operate by this same basic process,
specific operating procedures differ from
unit to unit.
About Facsimile Compatibility
The CCITT (Consultative Committee for
International Telephone and Telegraph),
which sets worldwide standards for data
communication,
classifies
devices into three groups. The grouping
is based on how a fax unit sends
information, in what form, and at which
speed.
To simplify, you can think of fax units as
being grouped by speed:
Group 1
includes 6-minute units, Group 2 includes
3-minute units, and Group 3 includes
sub-minute units. These speeds refer to
the amount of time it takes a fax unit to
send or receive a standard business letter
over the telephone lines.
Your FX505 is compatible with CClTT G3
mode units.
c o n t i n u e d
facsimile
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