Ricoh A230, Руководство по обслуживанию, Страница: 782 / 1134

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A6
9
3
BIT SWITCHES
4-57
SM A230/A231/A232
G3 Switch 07
No FUNCTION COMMENTS
0
to
1
PSTN cable equalizer
(tx mode: Internal)
Bit 1
Bit 0 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
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.
Use the dedicated transmission parameters for
specific receivers.
Also, try using the cable equalizer if one or more
of the following symptoms occurs.
•
Communication error
•
Modem rate fallback occurs frequently.
Note: This setting is not effective in V.34
communications.
2
to
3
PSTN cable equalizer
(rx mode: Internal)
Bit 3
Bit 2 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
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.
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: This setting is not effective in V.34
communications.
4 PSTN cable equalizer
(V.8/V.17 rx mode: External)
0: Disabled
1: Enabled Keep this bit at “1”.
5
PSTN cable equalizer
(V.34 rx mode; External) Keep this bit at “1”.
6
7
Not used Do not change the settings.
G3 Switch 08 - Not used (do not change the settings)