Ricoh B291 Service Manual page 815

G3-2 Switch 06
No FUNCTION
4 Modem types available for
to
reception
7 Bit 7 6 5 4 Setting
0 0 0 1 V.27ter
0 0 1 0 V.27ter, V.29
0 0 1 1 V.27ter, V.29
V.33
0 1 0 0 V.27ter, V.29,
V.17/V.33
0 1 0 1 V.27ter, V.29,
V.17/V33,
V.34
Other settings - Not used
G3-2 Switch 07
No FUNCTION
0 PSTN cable equalizer
to (tx mode: Internal)
1 Bit 1 Bit 0
0 0
0 1
1 0
1 1
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
5-7 Not used
SM
CÓPIA NÃO CONTROLADA
The setting of these bits is used to inform the
transmitting terminal of the available modem type for
the machine in receive mode.
If V.34 is not selected, V.8 protocol must be
disabled manually.
Cross reference
V.8 protocol on/off - SG3 switch 03, bit2
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.
• Communication error
• Modem rate fallback occurs frequently.
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 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
•
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 "1".
Do not change the settings.
77
CÓPIA NÃO CONTROLADA
BIT SWITCHES
SP No. 1-106-007
COMMENTS
SP No. 1-106-008
COMMENTS
B779