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SERVICE TABLES AND PROCEDURES
BIT SWITCHES
G3 Switch 07
FUNCTION
PSTN cable equalizer
(tx mode)
Bit 1
Bit 0
0
0
0
0
1
1
1
0
1
1
PSTN cable equalizer
(rx mode)
Bit 3
Bit 2
0
0
2
0
1
1
0
3
1
1
4-7 Not used
G3 Switch 08 - Not used (do not change the settings)
G3 Switch 09 - Not used (do not change the settings)
G3 Switch 0A
FUNCTION
Maximum allowable carrier
drop during image data
reception
0
Bit 1
Bit 0
Value (ms)
0
0
1
0
1
1
0
1
1
2-3 Not used
Maximum allowable frame
interval during image data
4
reception.
0: 5 s
1: 13 s
5
Not used
Reconstruction time for the
first line in receive mode
0: 6 s
1: 12 s
6
7
Not used
Use a higher setting if there is signal loss at higher
frequencies because of the length of wire between the
Setting
modem and the telephone exchange.
None
Low
Also, try using the cable equalizer if one or more of the
Medium
following symptoms occurs.
High
• 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
Setting
modem and the telephone exchange.
None
Low
Also, try using the cable equalizer if one or more of the
Medium
following symptoms occurs.
High
• Communication error with error codes such as
0-20, 0-23, etc.
• Modem rate fallback occurs frequently.
Do not change the settings.
These bits set the acceptable modem carrier drop time.
Try using a longer setting if error code 0-22 is frequent.
200
400
800
Not used
Do not change the settings.
This bit set the maximum intervals between each EOL
signal (end-of-line) or intervals between each ECM
frame from the other end.
Try using a longer setting if error code 0-21 is frequent.
Do not change the settings.
When the sending terminal is controlled by a computer,
there may be a delay in receiving page data after the
local machine accepts set-up data and sends CFR. If
this occurs, set this bit to 1 to give the sending
machine more time to send data.
Refer to error code 0-20.
Do not change the settings.
COMMENTS
COMMENTS
4-38
July 30th, 1996
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