Ricoh D131 Service Manual page 1042

6 Not used
Select detection of reverse
polarity in ringing
7
0: Off
1: On
No Function
Training error detection
0-3
threshold
4-7 Not used
No
Initial Tx modem rate (kbps)
Bit 3 Bit 2
0 0
0 0
0 0
0-3
0 1
0 1
0 1
0 1
1 0
D619
Do not change the settings
This switch is used to prevent reverse polarity in
ringing on the phone line (applied to PSTN-G3
ringing). Do not change this setting
0: No detection
1: Detection (Japan and Korea only)
G3 Switch 04 (SP No. 1-105-005)
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
Comments
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
150 SM