Ricoh D117 Service Manual page 1196

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 Bit0
0 0 0 0
0 0 0 1
0 0 1 0
0-3
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
SM
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.
If the setting is "Disabled", the bit
switch setting is used.
bps
If training with a particular remote terminal
always takes too long, the initial modem rate
Not used
may be too high. Reduce the initial Tx
2400
modem rate using these bits.
For the settings 14.4 or kbps slower, Switch
4800
04 bit 4 must be changed to 0.
7200
Do not use settings other than listed
9600
on the left. If the setting is
12000
"Disabled", the bit switch setting is
used.
14400
16800
139
Dedicated Transmission Parameters
Do not use settings other
than listed on the left.
COMMENTS
D649