Toshiba GD-1370, Руководство по обслуживанию

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DIALING/COMMUNICATION CONTROL
3 - 13
2. Standard procedure
Network interaction
(Phase 1)
( P3-14)
Final training
(Phase 4)
( P3-16)
Control channel
( P3-17)
Primary channel
( P3-18)
Image data
( P3-18)
Probing/Ranging
(Phase 2)
( P3-15)
Communication
end procedure
( P3-19)
Equalizer/Echo
canceller training
(Phase 3)
( P3-16)
The available modulation mode is informed.
Each declares that it has V.34 capability. The
procedure moves to V.34 in the phase 2.
To determine the image transmission speed,
the transmitter sends a training signal.
The optimum image transmission speed is
determined according to the training signal
received.
The training signal is sent with the determined
parameter, then the image data are sent.
Transmitter Receiver
Line opened
Line closed
Line opened
After the information about the modem capa-
bility is exchanged, the receiver determines-
the modulation speed based on the result of
the reception of the probing signal which was
sentby the transmitter.
The pre-FAX transmission which is the same
as that for the normal T.30 is performed at
1200 bps.
The post-FAX transmission which is the same
as that for the normal T.30 is performed at
1200 bps.
Fig. 3-8