Ricoh D127 Field Service Manual page 439

Modem types available for reception
Bit 7 Bit 6 Bit 5
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
Bit 4 Setting
1 V.27ter
• The setting of these bits is used to inform the
V.27ter, V.
0
29
V.27ter, V.
1 • If V.34 is not selected, V.8 protocol must be
29
V.27ter, V.
Cross reference:
0
29, V.17
V.8 protocol on/off - G3 switch 03, bit2
V.27ter, V.
1 29, V.17,
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
transmitting terminal of the available modem
type for the machine in receive mode.
disabled manually.
COMMENTS
communications.
Bit Switches
231