Ricoh D131 Service Manual page 1052

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)
G3-2 Switch 04 (SP No. 1-106-005)
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.
G3-2 Switch 05 (SP No. 1-106-006)
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
160 SM