Ricoh MP C307 Field Service Manual page 1170

4.Service Tables
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
(V.8/V.17 rx mode:
External)
0: Disabled
88
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".