Gestetner A265, Service Manual

Page: 658 / 855

BIT SWITCHES
A265/A267 4-54 SM
G3 Switch 03
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.
N Transmit 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 V.8 protocol in manual
transmission
0: Disabled
1: Enabled
1: The machine detects either ANSam or CED
during manual transmission.
7 Not used Do not change the setting.
G3 Switch 04
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.
CÓPIA NÃO CONTROLADA
CÓPIA NÃO CONTROLADA