Bit Switches 
D361 104  SM 
G3 Switch 03 (SP No. 1-105-004) 
No  Function  Comments 
 
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. 
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.