Canon FAX-L1000 - Manual (Page 223)

3-79
FAX-L1000 Chapter 3: Technical Reference
b) Typical protocol
Figure 3-35 Typical Protocol
CNG
ANSam
JM
CM
CJ
INFO0a
INFO0c
B
A
Connected to the line
L1
L2
A
B
INFO0h
S
PP
TRN
PPh
ALT
MPh
MPh
E
flags
TSI
DCS
"1"
flags
S
PP
B1
Image
data
PPh
ALT
MPh
MPh
E
NSF
CSI
DIS
flags
CFR
flags
"1"
DCN
Turn-Off
ALT
Sh
E
flags
MCF
flags
ALT
Sh
PPS-EOP
flags
E
Line released
Line released
Network interaction
(Phase 1)
Probing
(Phase 2)
Primary channel
equalizer training
(Phase 3)
Control channel
start-up
(Phase 4)
Control channel
Primary channel
resyncronization
procedure
Image data
TX RX
Control channel
resyncronization
procedure
(Communication end
procedure)
A
NSS
V.8
V.34
Declares the usable modulation
mode.
Declares that V.34 capability exists
on each machine, and transfers the
V.34 procedures with phase 2.
After declaring the modem's
modulation speed capacity, etc. to
each machine, the receiving side
determines the modulation speed
based on the results of an probing
signal output by the transmitting
side.
The transmitting side outputs a
training signal to determine the
image transmission speed.
The optimum image transfer speed
is determined by the condition in
which the training signal is received.
The pre-message protocol is done
in the same way as a normal T.30,
at 1200bps.
The training signal is output with the
determined parameters, and
continues to transmit the image
data.
The post-message protocol is done
in the same way as a normal T.30,
at 1200bps.
B
A
S
S
Sh
Sh