Ricoh FAX7000L, Field Service Manual

Page: 372 / 377

Appendix A. Glossary
ADF
Automatic Document Feeder: An assembly
which automatically feeds documents into the
scanner one page at a time.
BSRU
Bar Scanner Reader Unit: This PCB connects
the optional bar code reader to the controller
on the SPU board.
CCD
Charge Coupled Device: A solid state device
which converts light reflected from the docu-
ment into an analog video signal.
CED
Called Station Identification: A protocol signal
which informs the calling station that a fax ter-
minal has been reached.
CCITT
Consultative Committee for International
Telephone and Telegraph: A part of the U.N.
which sets and governs facsimile standards.
CFR
Confirmation to Receive: A protocol signal
used by the receiving terminal to tell the trans-
mitter that modem training and set-up infor-
mation was accepted.
CNG
Calling Tone: A 1100 Hz tone that is used by
auto-dialling machines to alert a manual
receive machine that a fax is on the line.
CSI
Called Subscriber Identification: The phone
number of the fax machine. This is used for
identification instead of the TTl when com-
municating with a non-Ricoh machine.
DCN
Disconnect: A protocol signal used by the
transmitter to release the line.
DCR
Data Compression and Reconstruction: Com-
pression reduces the volume of data being
sent out, and reconstruction recreates the
original data at the other end. See MH, MR,
MMR, and EFC.
A-1