Ricoh B205 Service Manual page 725

BIT SWITCHES
G3-2 Switch 03
No FUNCTION
4 CTC transmission conditions
0: After one PPR signal
received
1: After four PPR signals
received (ITU-T standard)
5 Modem rate used for the next
page after receiving a negative
code (RTN or PIN)
0: No change
6 Not used
7 Select detection of reverse
polarity in ringing
0: Off
1: On
G3-2 Switch 04
No FUNCTION
0 Training error detection
to threshold
3
4-7 Not used
SM
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.
N Transmit N
N
Transmit-
N - Number of frames to be retransmitted
Resend
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.
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.
1: Fallback
Do not change the settings.
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
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.
Do not change the settings.
75
SP No. 1-106-004
COMMENTS
≤ Re
send
Number of transmitted frames
Outside Japan
Inside Japan only
SP No. 1-106-005
COMMENTS
B766