Canon FACSIMILE BASIC 2000 Service Manual page 253

6.8.3 Details of FCF
The FCF for each signal is determined as shown in the following table.
Table 5-14 Correspondence between Signal Name and FCF
Initial identification
Transmit command
Receive command
Pre-message responses
Post-message
Commands
Post-message responses
Others
(Note)
According to the
The side that receives DIS first X
the other side X
that is, In regular communications:the calling side:X = 1
In polling:
• Ordinarily, X is "0" and becomes "1" when DIS is received.
This also implies protection against echo.
• X may not be a factor in cases of other manufacturer's facsimiles.
G3 FACSIMILE COMMUNICATIONS
Signal
Name
NSF 00000100
CSI 00000010
DIS 00000001
NSC 10000100
CIG 10000010
DTC 10000001
NSS X1000100
TSI X1000010
DCS X1000001
CFR X0100001
FTT X0100010
EOM X1110001
MPS X1110010
EOP X1110100
MCF X0110001
RTP X0110011
RTN X0110010
DCN X1011111
ITU-T recommendation:
"1"
"0"
the called side:X = 0
the calling side: X = 0
the called side:X = 1
FCF Remarks
FIF follows right
after.
FIF does not fol-
low.
5–111
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