Ricoh M281 Series Service Manual page 942

Bit Switches - 4
0-3 Training error detection
threshold
4-7 Not used
No
0-3 Initial Tx modem rate (kbps)
Bit 3 Bit 2
0 0
0 0
0 0
0 1
0 1
0 1
0 1
1 0
1 0
1 0
1 0
1 1
1 1
1 1
Other settings - Not used
4-5 Initial modem type for 9.6 k or 7.2 kbps. These bits set the initial modem type for
Bit 5 Bit 4
D255/D256 FAX OPTION
0 - F (Hex); 0 - 15 bits
If the number of error bits in the received TCF is
below this threshold, the machine informs the
sender that training has succeeded.
Do not change the settings.
G3 Switch 05 (SP No. 1-105-006)
Function
Bit 1 Bit 0 kbps
0 1 2.4
1 0 4.8
1 1 7.2
0 0 9.6
0 1 12.0
1 0 14.4
1 1 16.8
0 0 19.2
0 1 21.6
1 0 24.0
1 1 26.4
0 0 28.8
0 1 31.2
1 0 33.6
Setting
Comments
These bits set the initial starting modem
rate for transmission.
Use the dedicated transmission
parameters if you need to change this for
specific receivers.
If a modem rate 14.4 kbps or slower is
selected, V.8 protocol should be disabled
manually.
Cross reference
V.8 protocol on/off - G3 switch 03, bit 2
9.6 and 7.2 kbps, if the initial modem rate
108 SM