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30 November, 1999
G3 Switch 06
FUNCTION
4
Modem types available for
to
reception
7
Bit 7 6 5 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,
0 1 0 1 V.27ter, V.29,
Other settings - Not used
G3 Switch 07
FUNCTION
0
PSTN cable equalizer
(TX mode)
1
Bit 1
Bit 0
0
0
0
1
1
0
1
1
2
PSTN cable equalizer
(RX mode)
3
Bit 3
Bit 2
0
0
0
1
1
0
1
1
4
PSTN external cable equalizer
(V.27ter, V.29, V.33/V.17, V.8
rx mode)
0: Disabled 1: Enabled
5
PSTN external cable equalizer
(V.34 rx mode)
0: Disabled 1: Enabled
6-7 Not used
The settings of these bits inform the transmitting
terminal of the available modem type for the
receiving machine.
V.33 is an exclusive Ricoh mode (NSF).
V.33
V33, V17
V.33, V.17, V.34
Use a higher setting if there is signal loss at
higher frequencies because of the length of wire
Setting
between the modem and the telephone
None
exchange.
Low
Use the dedicated transmission parameters if
Medium
you need to change this for specific receivers.
High
Also, try using the cable equalizer if one or more
of the following symptoms occurs:
• Communication error
• Modem rate fallback occurs frequently.
Note: This setting is ineffective in V.34
communications.
Use a higher setting if there is signal loss at
higher frequencies because of the length of wire
Setting
between the modem and the telephone
None
exchange.
Low
Also, try using the cable equalizer if one or more
Medium
of the following symptoms occurs:
• Communication error with error codes such as
High
0-20, 0-23, etc.
• Modem rate fallback occurs frequently.
Note: This setting is ineffective in V.34
communications.
Keep this bit at "1" in most cases.
Set this bit to 0 when the line quality is good.
(e.g. digital PABX)
The V.34 modem rate may decrease from
equalizer over correction.
Do not change these settings.
COMMENTS
COMMENTS
4-33
BIT SWITCHES
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