Ricoh IM C300 Service Manual page 1589

0- Tx level
4
Bit4 Bit3 Bit2 Bit1 Bit0
0 0 0
0 0 0
0 0 0
0 0 0
0 0 1
0 1 1
1 1 1
5- Cable equalizer
7 Bit 7: 0, Bit 6: 0, Bit 5: 0 = None
Bit 7: 0, Bit 6: 0, Bit 5: 1 = Low
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
0- Initial Tx modem rate
3
Bit3 Bit2 Bit1 Bit0 bps
0 0 0
0 0 0
0 0 1
0 0 1
0 1 0
0 1 0
0 1 1
0 1 1
D0CK
0 0 0
0 1 –1
1 0 –2
1 1 –3
0 0 –4
1 1 –15
1 1 Disabled
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.
0 Not
For the settings 14.4 or kbps slower, Switch 04 bit 4 must
used
be changed to 0.
1 2400
0 4800
1 7200
0 9600
1 12000
0 14400
1 16800
Dedicated Transmission Parameters
If communication with a particular remote terminal
often contains errors, the signal level may be
inappropriate. Adjust the Tx level for communications
with that terminal until the results are better.
If the setting is "Disabled", the NCU parameter 01
setting is used.
•
Do not use settings other than listed on the
left.
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.
•
Do not use settings other than listed on the
left.
If the setting is "Disabled", the bit switch setting is
used.
•
Do not use settings other than listed on the left. If
the setting is "Disabled", the bit switch setting is
used.
114 SM