3
© 2016-2020 Toshiba Tec Corporation All rights reserved
GD-1370
DIALING/COMMUNICATION CONTROL
3 - 15
- Probing/Ranging (Phase 2)
Examines the line characteristics and sets the parameters for the modulation related items such
as the modulating speed.
Transmitter
Signal name
Abbreviation
Function
Remarks
INFO sequence
INFO0c
Informs the modem
capabilities of the modulating
speed and frequency
transmission capability (two
frequency bands (high and
low) used to examine the line
characteristics), and requests
for adjusting.
Transmission rate: 600 bps
Tone B
B
Performs synchronization
between the modems by
means of a 1200 Hz tone
signal.
B
is a signal that shifts the
phase B 180°.
Tone
B
B
Line probing signal L1
L1
Sends a tone signal to
analyze the line
characteristics by probing.
Probing is to examine the line
characteristics.
Tone signal between 150
Hz and 3,750 Hz in units of
150 Hz
Line probing signal L2
L2
Receiver
Signal name
Abbreviation
Function
Remarks
INFO sequence
INFO0a
Informs the modem capability
such as the modulating speed
and frequency transmission
capability.
Transmission rate: 600 bps
Tone A
A
Sends a 2400 Hz tone signal
to perform synchronization
between the modems.
A
is a signal that shifts the
phase A 180°.
Tone
A
A
INFO sequence
INFO0h
Based on the analysis of the
line probing signal sent from
the transmitter, it informs the
pre-emphasis filter and
modulating speed to be used
for the data transmission.
Transmission rate: 600 bps
Содержание GD-1370
Страница 12: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved SPECIFICATIONS AND OUTLINE OF SYSTEM 1 6 ...
Страница 46: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved INSTALLATION 4 2 ...
Страница 50: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved SELF DIAGNOSIS MODE 6 2 ...
Страница 64: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved TROUBLESHOOTING 7 14 ...
Страница 66: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved PRECAUTIONS FOR INSTALLATION OF FAX BOARD 8 2 ...
Страница 68: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved FIRMWARE UPDATING 9 2 ...
Страница 70: ...GD 1370 2016 2020 Toshiba Tec Corporation All rights reserved 2 ...
Страница 71: ......
Страница 72: ...1 11 1 OSAKI SHINAGAWA KU TOKYO 141 8562 JAPAN ...