Canon MultiPASS C530 Service Manual page 118

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
Signal
Calling tone
Dial-tone menu signal
CM terminator
Dial-tone display signal
• Receiver
Signal
Modified response tone
Common menu
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
MultiPASS C530/C560 Chapter 2: Technical Reference
Abbre-
viation
1100-Hz tone signal specified by
CNG
T.30 to identify an automatic-
calling fax machine.
Indicate an available modulation
CM
method (V.21, V.27ter, V.29,
V.17, or V.34).
Indicate JM signal detection and
CJ
CM signal termination.
Indicate the general transmission
CI
function.
Sent to resume the V.8 protocol.
Abbre-
viation
ANSam 2100-Hz tone signal amplitude-
modulated by 15 Hz.
Indicate the terminal type, such as
JM
a fax machine, and an available
modulation method in response to
the available modulation method
reported by the CM from the
transmitter.
2-39
Meaning
M o d u l a t e d b y
V.21(L)
M o d u l a t e d b y
V.21(L)
Late start only.
(See Figure 3-xx.)
M o d u l a t e d b y
V.21(L)
Meaning
Equivalent to CED
f o r
models.
M o d u l a t e d b y
V.21(H)
Remarks
*1
.
*1 .
*1
.
Remarks
p r e v i o u s
*1 .