Ricoh A250 Service Manual page 528

DEDICATED TRANSMISSION PARAMETERS
Switch 04
No FUNCTION
4 V.8 protocol
0: Off
1: Disabled
5 Compression modes available
in transmit mode
0: MH only
1: Disabled
6 ECM during transmission
7 Bit 7 Bit 6 Setting
0 0
0 1
1 0
1 1
Switch 05 - Not used (do not change the settings)
Switch 06 - Not used (do not change the settings)
Switch 07 - Optional ISDN G4 kit required
No FUNCTION
0 Data rate
to Bits 3 2 1 0
3
0 0 0 0
0 0 0 1
1 1 1 1
4-7 Not used
Switch 08 - Optional ISDN G4 kit required
No FUNCTION
0 Link modulus
to Bits 3 2 1 0
3 0 0 0 0
0 0 0 1
1 1 1 1
4-7 Not used
A250
If transmissions to a specific destination always
end at a lower modem rate (14,400 bps or lower),
disable V.8 protocol so as not to use V.34
protocol.
0: V.34 communication will not be possible.
If the setting is 'Disabled', the bit switch setting is
used.
This bit determines the capabilities that are
informed to the other terminal during
transmission.
If the setting is 'Disabled', the bit switch setting is
used.
For example, if ECM is switched on but is not
wanted when sending to a particular terminal, use
Off the (0, 0) setting.
On
Note that V.8/V.34 protocol and JBIG
Not used
compression are automatically disabled if ECM is
Disabled
disabled.
If the setting is 'Disabled', the bit switch setting is
used.
If the setting is 'Disabled', the current setting of
Setting
G4 parameter switch 2 (bits 0 and 1) is used.
64 kbps
56 kbps
Disabled
Do not change the settings.
If the setting is 'Disabled', the current setting of
Setting G4 parameter switch 3 (bit 0) is used.
Modulo 8
Modulo 128
Disabled
Do not change the settings.
COMMENTS
COMMENTS
COMMENTS
4-66 SM