Ricoh FAX2000L - Page 101

BIT SWITCHES 30 November, 1999
4-34
G3 Switch 08
FUNCTION COMMENTS
0
1
PABX cable equalizer
(TX mode)
Bit 1 Bit 0 Setting
0 0 None
0 1 Low
1 0 Medium
1 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 if
you need to change this 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.
Note: This setting is ineffective in V.34
communications.
2
3
PABX cable equalizer
(RX mode)
Bit 3 Bit 2 Setting
0 0 None
0 1 Low
1 0 Medium
1 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.
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.
Note: This setting is ineffective in V.34
communications.
4
PSTN external cable equalizer
(V.27ter, V.29, V.33/V.17, V.8
rx mode)
0: Disabled 1: Enabled
Set this bit to 0 when line quality is good.
(e.g. digital PABX)
5 PSTN external cable equalizer
(V.34 rx mode)
0: Disabled 1: Enabled
Set this bit to 0 when line quality is good.
(e.g. digital PABX)
The V.34 modem rate may decrease from
equalizer over correction.
6-7
Not used Do not change these settings.
G3 Switch 09 - Not used (do not change these settings)