Panasonic KX-FT21RS - Manual (Page 126)

Note 2 - Standard facsimile units conforming to T.3 must have the following capability: Index of cooperation (IOC)=264.
Note 3 - Standard facsimile units conforming to T.4 must have the following capability: Paper length=297 mm.
Signal Identification Signal Format Function
Training 1 ——————— A fixed pattern is transmitted to the receiving side at a speed
(2400 to 9600 bps) designated by DCS, and the receiving side
optimizes the automatic equalizer, etc., according to this signal.
TCF
(Training Check) ——————— Sends 0 continuously for 1.5 seconds at the same speed as the
training signal.
CFR
(Confirmation to Receive) X0100001 Notifies the sending side that TCF has been properly received. If
TCF is not properly received, FTT (Failure To Train) X0100010 is
relayed to the sender. The sender then reduces the transmission
speed by one stage and initiates training once again.
Training 2 ——————— Used for reconfirming the receiving side like training 1.
Image Signal Refer to the next page. ———————
RTC
(Return to Control) ——————— Sends 12 bits (0...01 × 6 times) to the receiver at the same speed
as the image signal and notifies completion of transmission of the
first sheet.
EOP
(End of Procedure) X1110100 End of one communication
MCF
(Message Confirmation) X0110001 End of 1 page reception
DCN
(Disconnect) X1011111 Phase E starts.
MPS
(Multi-Page Signal) X1110010 Completion of transmission of 1 page. If there are still more
documents to be sent, they are output instead of EOP. After MCF
reception, the sender transmits an image signal of the second
sheet.
PRI-EOP
(Procedural Interrupt-EOP) X1111100 If there is an operator call from the sender, it is output after RTC.
PIP
(Procedural Interrupt Positive) X0110101 This is output when an operator call is received.
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