Bit Switches - 4
SM 111 D255/D256 FAX OPTION
FAX OPTION
Bit 3 Bit 2 Setting 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.
This setting is not effective in
V.34 communications.
0 0 None
0 1 Low
1 0 Medium
1 1 High
4 PSTN cable equalizer
(V.8/V.17 RX mode: External)
0: Disabled
1: Enabled
Keep this bit at "1".
5 Not used Do not change the settings.
6 Parameter selection for dial tone
detection
0: Normal parameter
1: Specific parameter
0: This uses the fixed table in the ROM
for dial tone detection.
1: This uses the specific parameter
adjusted with SRAM (69ECBEH -
69ECDEH). Select this if the dial tone
cannot be detected when the "Normal
parameter: 0" is selected.
7 Not used Do not change the settings.
G3 Switch 08 - Not used (do not change the settings)
G3 Switch 09 - Not used (do not change the settings)
G3 Switch 0A (SP No. 1-105-011)
No Function Comments
0-1 Maximum allowable carrier drop
during image data reception
These bits set the acceptable modem
carrier drop time.
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