7
Short preamble
0: Disabled 1: Enabled
Refer to Appendix B in the Group 3 Facsimile Manual for
details about Short Preamble.
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)
0: When using ECM in non-standard (NSF/NSS) mode,
the machine sends a CTC to drop back the modem rate
after receiving a PPR, if the following condition is met in
communications at 14.4, 12.0, 9.6, and 7.2 kbps.
NTransmit- Number of transmitted frames
NResend- Number of frames to be retransmitted
1: When using ECM, the machine sends a CTC to drop
back the modem rate after receiving four PPRs.
PPR, CTC: These are ECM protocol signals.
This bit is not effective in V.34 communications.
Bit Switches
227
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