Ricoh IM C300 Service Manual page 1563

Other settings - Not used
4- Modem types available for reception
7 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 - G3 switch 03, bit 2
Bit 7
0
0
0
0
0
Other settings - Not used
G3 Switch 07 (SP No. 1-105-008)
No Function
0- PSTN cable equalizer
1 (TX mode: Internal)
Bit Bit Setting
1 0
0 0 None
0 1 Low
1 0 Medium
1 1 High
2- PSTN cable equalizer
3 (rx mode: Internal)
Bit Bit Setting
3 2
0 0 None
0 1 Low
1 0 Medium
1 1 High
4 PSTN cable equalizer
D0CK
Bit Bit Bit Types
6 5 4
0 0 1 V.27ter
0 1 0 V.27ter, V.29
0 1 1 V.27ter, V.29, V.33
1 0 0 V.27ter, V.29, V.17
1 0 1 V.27ter, V.29, V.17, V.34
Comments
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.
•
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 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.
•
This setting is not effective in V.34 communications.
Keep this bit at "1".
88
Bit Switches – 4
SM