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G3 FACSIMILE COMMUNICATIONS
• 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 scheme (V-series modem
mode) that is available between the transmitter and receiver.
Transmitter
5–76
Abbre-
Signal
viation
Calling tone
CNG
Call menu
CM
signal
CM terminator
CJ
Call indicator
CI
signal
Meaning
1100-Hz tone signal
specified by T.30 to
identify an automatic-
calling fax machine.
Indicate an available
modulation scheme
(V.21, V.27ter, V.29,
V.17, or V.34).
Indicate JM signal
detection and CM sig-
nal termination.
Indicate the general
transmission function.
Sent to resume the V.8
protocol.
Remarks
Modulated by
V.21(L)*1.
Modulated by
*1
V.21(L)
.
Late start only.
(See Fig. 5-60)
Modulated by
*1
V.21(L)
.
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