BIT SWITCHES
SM 75 B779
Fax Option
B779
G3-2 Switch 03 SP No. 1-106-004
No FUNCTION COMMENTS
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 N send≤ Re
N
Transmit- Number of transmitted frames
N
Resend- 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.
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 Æ Outside Japan
1: Detection Æ Inside Japan only
G3-2 Switch 04 SP No. 1-106-005
No FUNCTION COMMENTS
0
to
3
Training error detection
threshold
0 - F (Hex); 0 - 15 bits
If the number of error bits in the received TCF is
below this threshold, the machine informs the
sender that training has succeeded.
4-7 Not used Do not change the settings.
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