Ricoh Aficio 270 - Page 656

BIT SWITCHES
SM 4-57 A265/A267
Service
Tables
A895
G3 Switch 07
No FUNCTION COMMENTS
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)
G3 Switch 09
No FUNCTION COMMENTS
0
to
1
ISDN 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
ISDN 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
ISDN cable equalizer
(V.8/V.17 rx mode: External)
0: Disabled
1: Enabled
Keep this bit at “0” in most cases.
5
ISDN cable equalizer
(V.34 rx mode: External)
0: Disabled
1: Enabled
Keep this bit at “0” in most cases.
6-7
Not used Do not change the settings.