Toshiba e-STUDIO170F Service Manual page 386

[ 2-1 ] Network interaction (Phase 1)
The V.8 procedure is performed as the start up procedure for the V.34 high-speed modem.
In the V.8 procedure, mainly the optimum modulation method (V series modem mode) that can be oper-
ated between transmitter and receivers, is determined.
• Transmitter
Signal name Abbreviation
Calling tone
Call Menu signal
CM terminator
Call Indicator signal
• Receiver
Signal name Abbreviation
Answer amplitude
tone
Joint Menu signal
*1 V.21 (L) ....Low frequency channel defined by V.21 recommendation
V.21 (H) ....High frequency channel defined by V.21 recommendation
e-STUDIO170F Dialing and Communication Procedure
CNG 1,100-Hz tone specified by T.30 indicat-
ing the facsimile machine has the auto-
matic call function.
CM It mainly indicates an available modula-
tion method such as V.21, V.27ter, V.29,
V17 and V.34.
CJ It indicates the detection of the JM signal
or the termination of CM signal.
CI It indicates the general communication
functions. It is sent when the V.8 proce-
dure restarts.
ANSam 2,100-Hz tone amplitude-modulated to
15 Hz.
JM It indicates the terminal type such as a
facsimile machine, and is a response to
a CM sent from the transmitter and indi-
cates jointly available modulation
method.
1,080±100 Hz (980 Hz: 1,1180 Hz: 0)
1,750±100 Hz (1,650 Hz: 1,1850 Hz: 0)
Meaning
Meaning
9 - 14
Remark
It is modulated by V.21 (L) *1.
Transmission rate: 300 bps
It is modulated by V.21 (L) *1.
Transmission rate: 300 bps
For late start only.
See figure 3-40.
It is modulated by V.21 (L) *1.
Transmission rate: 300 bps
Remark
Tone equivalent to CED of the
conventional machine.
It is modulated by V.21 (H) *1.
Transmission rate: 300 bps
January 2005 © TOSHIBA TEC