Signals Transmitted By The Transmitter - Canon G3 Error Code List

2.4 Signals Transmitted by the Transmitter

CNG (calling tone)
It is a tone signal used to inform the other party that the machine is an auto-dial facsimile
machine.
NSS (non-standard facilities setup)
When NSF or NSC is received from the other party, an appropriate mode is selected, and
NSS is used to request reception. It is an ITU-T non-standard function command, and is
used to inform the other party that transmission will use a function not part of the ITU-T
recommendations (not part of DCS and a function unique to a specific manufacturer). It
includes a user name and maker code.
TSI (Transmitting Subscriber Identification)
It is used to indicate to the other party the telephone number of the transmitter.
DCS (Digital Command)
When DIS or DTC is received from the other party, an appropriate mode is selected, and
DCS is used to request reception. It is an ITU-T standard function command, and informs
the other party of the size of recording paper, speed of transmission, MTT, method of
coding, and recording resolution.
TRAINING (Training)
It is use to equalize modems for transmission at a specific speed, making sure that TCF,
which follows, will correctly be received.
TCF (Training Check)
It is a test signal sent before transmitting image data. A specific series of signals are sent
at the rate of transmission that will be used to transmit image data, thereby finding out if
the expected transmission may correctly be undertaken. (A sequence of 0s will be sent for
about 1.5 sec continuously.)
MESSAGE (Message)
It is a coded image signal.
RTC (Return to Control)
The last line of an image signal is coded, and RTC is added to it. As many as 6 EOLs (End
of Line) are continuously transmitted.
Q (Q Signal)
At times, those signals (EOP, EOM, MPS) that indicate the end of transmission of a single
page are generically called Q.
EOP (End of Procedure)
It is used to indicate that there is no next document at the end of transmission of images
for a single page.
EOM (End of Message)
It is used to indicate that there is another document at the end of the transmission of
images for a single page and, in addition, that the transmission will be in a different mode
of communication. After transmission of EOM, upon arrival of MCF from the other party,
the machine waits for DIS.
When DIS of the receiver is recognized, a check is made to be sure of the absence of a
conflict in relation to the transmitter; then, DCS is used to indicate the selected mode of
communication to the receiver.
A-5
Appendix