Canon FAX-L1000 - Manual (Page 224)

3-80
FAX-L1000 Chapter 3: Technical Reference
b-1) Network interaction (Phase 1)
The V.8 protocol is used as the startup protocol for high-speed modem V.34.
The V.8 protocol determines the best modulation method (V-series modem mode) that is
available between the transmitter and receiver.
• Transmitter
Abbre-
Signal viation Meaning Remarks
Calling tone CNG
Dial-tone menu CM
signal
CM terminator CJ
Dial-tone display CI
signal
• Receiver
Abbre-
Signal viation Meaning Remarks
Modified response ANSam
tone
Common menu JM
signal
*1
V.21(L): Low-frequency channel defined by V.21 recommendation
1080±100 Hz (980 Hz:1, 1180 Hz:0)
Transmission speed: 300bps
V.21(H): High-frequency channel defined by V.21 recommendation
1750±100 Hz (1650 Hz:1, 1850 Hz:0)
Transmission speed: 300bps
1100-Hz tone signal specified
by T.30 to identify an
automatic-calling fax
machine.
Indicate an available
modulation method
(V.21, V.27ter, V.29, V.17, or
V.34).
Indicate JM signal detection
and CM signal termination.
Indicate the general
transmission function.
Sent to resume the V.8
protocol.
Modulated by
V.21(L)
*1
.
Modulated by
V.21(L)
*1 .
Late start only.
(See Figure 3-36.)
Modulated by
V.21(L)
*1
.
2100-Hz tone signal
amplitude-modulated by 15
Hz.
Indicate the terminal type,
such as a fax machine, and an
available modulation method
in response to the available
modulation method reported
by the CM from the
transmitter.
Equivalent to CED
for previous models.
Modulated by
V.21(H)
*1
.