Gestetner A193 Service Manual page 655

G3 Switch 07
FUNCTION
0 PSTN cable equalizer
(tx mode)
1 Bit 1 Bit 0 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
2 PSTN cable equalizer
(rx mode)
3 Bit 3 Bit 2 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
4 Not used
to
7
G3 Switch 08 - Not used (do not change the settings)
G3 Switch 09
FUNCTION
0 ISDN cable equalizer
(tx mode)
1 Bit 1 Bit 0 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
2 ISDN cable equalizer
(rx mode)
3 Bit 3 Bit 2 Setting
0 0 None
0 1 Low
1 0 Medium
1 1 High
(A639)
COMMENTS
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.
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.
Do not change the settings.
COMMENTS
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.
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.
4-51
BIT SWITCHES
SM