Ricoh A250 Service Manual page 512

BIT SWITCHES
G3 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
ISDN: Europe models only
2 ISDN cable equalizer
to (rx mode: Internal)
3 Bit 3 Bit 2
0 0
0 1
1 0
1 1
ISDN: Europe models only
4 ISDN cable equalizer
(V.8/V.17 rx mode: External)
0: Disabled
1: Enabled
5 ISDN cable equalizer
(V.34 rx mode: External)
0: Disabled
1: Enabled
6-7 Not used
A250
Use a higher setting if there is signal loss at
higher frequencies because of the length of wire
Setting between the modem and the telephone
None exchange.
Low
Use the dedicated transmission parameters for
Medium
specific receivers.
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.
Use a higher setting if there is signal loss at
higher frequencies because of the length of wire
Setting between the modem and the telephone
None
exchange.
Low
Medium
Also, try using the cable equalizer if one or more
High
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.
Keep this bit at "0" in most cases.
ISDN: Europe models only
Keep this bit at "0" in most cases.
ISDN: Europe models only
Do not change the settings.
COMMENTS
Communication error
Modem rate fallback occurs frequently.
4-50 SM