8 REFERENCE MATERIAL
DPI (Dots Per Inch):
This is the unit of resolution. The scanner scans your document according to the selected resolution.
An 8-1 /2”
x 10“ page is broken down into about 1,728,000 dots if standard resolution is used. (Digital
compression techniques for G3 convert these into about 200,000 bits.)
EFC:
This is a digital data compression technique developed by Ricoh. It shortens the time for sending a
page.
External Telephone:
This is the telephone
Factory Setting:
The factory setting of
that is connected to the jack marked “TEL 1 or TEL 2“.
a function is the state into which it was programmed at the factory; this will also
be the state of that function in a new machine.
File:
See Memory File, Polling File.
Group 1, Group2, Group 3:
These are three of the internationally-agreed signaling and data transfer methods used for facsimile
communication (approved by CC ITT). They are also known as Gl, G2 and G3. Group 1 terminals are
also known as North American six-minute terminals.
Halftone:
This is a method for more accurate black-and-white reproduction of photographs or documents con-
taining different types of shading.
International Dialing Code:
This is the code that must be dialed at the beginning of the number if the destination is outside your
country.
Memory File:
This is a document stored in the SAF memory (see the next page) and the instructions (destinations,
time of transmission) for sending that document.
Modem:
Acronym for modulator/demodulator. A device that transforms a typical two level signal into a form
suitable for transmission over the telephone network.
Example: Facsimile signals converted into telephone signals and then back into facsimile signals to
complete transmission or reception.
Original:
Same as “Document” (see page 123).
Page Retransmission:
If the terminal you are sending to indicates that it did not properly receive the page you just sent, your
terminal will resend that page from memory. This only works if you used Memory Mode and if you are
not using ECM. (ECM is a more effective data retransmission method.)
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