Ricoh D131 Service Manual page 1084

Cable equalizer
Bit 7: 0, Bit 6: 0, Bit 5: 0 = None
Bit 7: 0, Bit 6: 0, Bit 5: 1 = Low
5-7
Bit 7: 0, Bit 6: 1, Bit 5: 0 = Medium
Bit 7: 0, Bit 6: 1, Bit 5: 1 = High
Bit 7: 1, Bit 6: 1, Bit 5: 1 = Disabled
Switch 02
No FUNCTION
Initial Tx modem rate
Bit3 Bit2 Bit1
0 0
0 0
0 0
0-3 0 0
0 1
0 1
0 1
0 1
1 0
D619
Bit0 bps
0 0 Not used
0 1 2400
1 0 4800
1 1 7200
0 0 9600
0 1 12000
1 0 14400
1 1 16800
0 0 19200
Use a higher setting if there is signal
loss at higher frequencies because
of the length of wire between the
modem and the telephone exchange
when calling the number stored in
this Quick/Speed Dial.
Also, try using the cable equalizer if
one or more of the following
symptoms occurs.
Communication error with error
codes such as 0-20, 0-23, etc.
Modem rate fallback occurs
frequently.
Note: Do not use settings other than
listed on the left. If the setting is
"Disabled", the bit switch setting is
used.
COMMENTS
If training with a particular remote terminal
always takes too long, the initial modem rate
may be too high. Reduce the initial Tx
modem rate using these bits.
For the settings 14.4 or kbps slower, Switch
04 bit 4 must be changed to 0.
Note: Do not use settings other than listed
on the left. If the setting is "Disabled", the bit
switch setting is used.
192 SM