Ricoh B230 Service Manual page 1056

Dedicated Transmission Parameters
Do not program a value between 79h and FEh.
Switch 01
No
Tx level
Bit4 Bit3
0 0
0 0
0 0
0-4
0 0
0 0
0 1
1 1
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
0-3 Initial Tx modem rate
Bit3 Bit2 Bit1
B786
FUNCTION
Bit2 Bit1 Bit0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 1 1
1 1 1 Disabled
Bit0 bps
If communication with a particular
0
remote terminal often contains
errors, the signal level may be
–1
inappropriate. Adjust the Tx level for
communications with that terminal
–2
until the results are better.
If the setting is "Disabled", the NCU
–3
parameter 01 setting is used.
–4
Do not use settings other
than listed on the left.
–15
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.
COMMENTS
If training with a particular remote terminal
always takes too long, the initial modem
106
COMMENTS
SM