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.
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 → Outside Japan
1: Detection → Inside Japan only
G3 Switch 04 [SP No. 1-105-005]
No Function Comments
0-3 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.
G3 Switch 05 [SP No. 1-105-006]
No FUNCTION COMMENTS
0-3
Initial Tx modem rate
These bits set the initial starting modem rate for
transmission.
Use the dedicated transmission parameters if you need
to change this for specific receivers.
If a modem rate 14.4 kbps or slower is selected, V.8
protocol should be disabled manually.
Cross reference
Bit 3 Bit 2 Bit 1 Bit 0 bps
0 0 0 1 2.4k
0 0 1 0 4.8k
0 0 1 1 7.2k
4. Service Tables
80
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