Panasonic KX-F900 Service Manual page 148

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(6) Explanation of Technology
(j) G3 Communication Signals (T. 30 Binary Process)
In G3 Facsimile communication, this is the procedure for exchange of control signals between the sending and receiving
machines both before and after transception of image signals.
Control signals at 300 bps FSK are: 1850 Hz...0, 1650Hz...1.
An example of binary process in G3 communication is shown below.
Transmitter Side Receiver Side
Ph_Lse A
Phase B
Document set
Dial
FAX SW
Checks the performance of the
sendingmachine (document width,
transmission speed, etc.), and sets
the communication mode.
Transmission Start
Phase C
Phase D
1
Phase E
Transmission End
Information of Disconnect
Disconnect
Explanation of Signals
(CNG) ._
CED
DIS
----_____ DCS
Training 1, TCF
CFR
Training 2
Image Information
EOP
MCF
.---.__._____ DCN
Bell Detection
Notifies of capacity of
receiving unit (e.g., recording
paper width, transmission speed).
Check the receive preparation
and line condition.
Receive preparation OK
Record Start
Record Stop
Reception OK
Disconnect
Control signals are comprised mainly of 8-bit identification signals and the data signals added to them. Data signals
are added to DIS and DCS signals.
Signal ..... DIS (Digital Identification Signal)
Identification Signal Format .....00000001
Function:
Notifies of capacity of receiving unit
The added data signals are as follows.
(Example)
Bit No. DIS/DTC DCS
1 Transmitter - T. 2 operation
2 Receiver - T. 2 operation Receiver - T. 2 operation
3 T.2 IOC = 176 T. 2 IOC = 176
4 Transmitter - T. 3 operation
5 Receiver - T. 3 operation Receiver - T. 3 operation
6 Reserved for future T. 3 operation features
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