Ricoh B082 Service Manual page 782

BIT SWITCHES
G3-1 Switch 07
No FUNCTION
2 PSTN cable equalizer
to (rx mode: Internal)
3 Bit 3 Bit 2
0 0
0 1
1 0
1 1
4 PSTN cable equalizer
(V.8/V.17 rx mode: External)
0: Disabled
1: Enabled
5 PSTN cable equalizer
(V.34 rx mode; External)
6-7 Not used
G3-1 Switch 08 - Not used (do not change the settings)
G3-1 Switch 09
No FUNCTION
0 ISDN cable equalizer
to (tx mode: Internal)
1 Bit 1 Bit 0
0 0
0 1
1 0
1 1
B547
Use a higher setting if there is signal loss at higher
frequencies because of the length of wire between
Setting the modem and the telephone exchange.
None
Low Also, try using the cable equalizer if one or more of
Medium the following symptoms occurs.
High
•
•
Note: This setting is not effective in V.34
communications.
Keep this bit at "1".
Keep this bit at "1".
Do not change the settings.
Use a higher setting if there is signal loss at higher
frequencies because of the length of wire between
Setting the modem and the telephone exchange.
None
Use the dedicated transmission parameters for
Low
specific receivers.
Medium
High
Also, try using the cable equalizer if one or more of
the following symptoms occurs.
•
•
Note: This setting is not effective in V.34
communications.
COMMENTS
Communication error with error codes such as
0-20, 0-23, etc.
Modem rate fallback occurs frequently.
COMMENTS
Communication error
Modem rate fallback occurs frequently.
74
SP No. 1-105-008
SP No. 1-105-010
SM