G3 Switch 08
FUNCTION
0
PABX cable equalizer
(tx mode)
1
Bit 1
Bit 0
0
0
0
1
1
0
1
1
2
PABX cable equalizer
(rx mode)
3
Bit 3
Bit 2
0
0
0
1
1
0
1
1
4
PABX external cable equalizer
(V.17, V.8 rx mode)
0: Disabled 1: Enabled
5
PABX external cable equalizer
(V.34 rx mode)
0: Disabled 1: Enabled
6-7 Not used
SM
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
Medium
Also, try using the cable equalizer if one or more
High
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.
Set this bit to 0 when line quality is good.
(e.g. for a digital PABX)
Set this bit to 0 when line quality is good.
(e.g. for a digital PABX)
The V.34 modem rate may decrease if the
equalizer is over-corrected.
Do not change these settings.
4-49
BIT SWITCHES
COMMENTS
A250