Ricoh D072 Service Manual page 594

Modem types available for reception
Bit 7 Bit 6 Bit 5 Bit 4
0 0 0
0 0 1
0 0 1
4-7
0 1 0
0 1 0
Other settings - Not used
G3 Switch 07 [SP No. 1-105-008]
No FUNCTION
PSTN cable equalizer
(tx mode: Internal)
Bit 1: 0, Bit 0: 0 = None
0-1
Bit 1: 0, Bit 0: 1 = Low
Bit 1: 1, Bit 0: 0 = Medium
Bit 1: 1, Bit 0: 1 = High
SM Appendix
Setting
1 V.27ter
0 V.27ter,V.29
The setting of these bits is used to
inform the transmitting terminal of the
V.27ter,
1
available modem type for the machine
V.29, V.33
in receive mode.
V.27ter,
If V.34 is not selected, V.8 protocol
0 V.29,
must be disabled manually.
V.17/V.33
Cross reference:
V.8 protocol on/off - G3 switch 03, bit2
V.27ter,
V.29,
1
V.17/V33,
V.34
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.
7-55
Bit Switches
COMMENTS
D067/D068/D069/D072