Bit Switches
SM 87 M381
Fax Option
Type SP5200
(M381)
G3 Switch 03 [SP No. 1-105-004]
No FUNCTION COMMENTS
0
DIS detection number
(Echo countermeasure)
0: 1
1: 2
0: The machine will hang up if it receives the same
DIS frame twice.
1: Before sending DCS, the machine will wait for
the second DIS which is caused by echo on the
line.
1
Not Used
Do not change the settings.
2
V.8 protocol
0: Disabled
1: Enabled
0: V.8/V.34 communications will not be possible.
Note:
Do not set to 0 unless the line condition is always
bad enough to slow down the data rate to 14.4
kbps or lower.
3
ECM frame size
0: 256 bytes
1: 64 bytes
Keep this bit at "0" in most cases.
4
CTC transmission conditions
0: After one PPR signal
received
1: After four PPR signals
received (ITU-T standard)
When using ECM in non-standard (NSF/NSS)
mode at 14.4, 12.0, 9.6, and 7.2 kbps;
0: The machine sends a CTC to drop back the
modem rate after receiving a PPR.
1:The machine sends a CTC to drop back the
modem rate after receiving four PPRs.
5
Modem rate used for the next
page after receiving a negative
code (RTN or PIN)
0: No change 1: Fallback
1: The machine's tx modem rate will fall back
before sending the next page if a negative code is
received. This bit is ignored if ECM is being used.
6
Not Used
Do not change the settings
7
Select detection of reverse
polarity in ringing
0: Off
1: On
This switch is used to prevent reverse polarity in
ringing on the phone line (applied to PSTN-G3
ringing). Do not change this setting
0: No detection
1: Detection (Japan and Korea only)
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