Ricoh D127, Field Service Manual

Page: 439 / 474

4-7
Modem types available for reception
• 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, bit2
Bit 7 Bit 6 Bit 5 Bit 4 Setting
0 0 0 1 V.27ter
0 0 1 0
V.27ter, V.
29
0 0 1 1
V.27ter, V.
29
0 1 0 0
V.27ter, V.
29, V.17
0 1 0 1
V.27ter, V.
29, V.17,
V.34
Other settings - Not used
G3 Switch 07 [SP No. 1-105-008]
No FUNCTION COMMENTS
0-1
PSTN cable equalizer
(tx mode: Internal)
Bit 1: 0, Bit 0: 0 = None
Bit 1: 0, Bit 0: 1 = Low
Bit 1: 1, Bit 0: 0 = Medium
Bit 1: 1, Bit 0: 1 = High
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.
Bit Switches
231