Gestetner B130 Service Manual page 621

BIT SWITCHES
G3 Switch 03
No. FUNCTION
0 DIS detection number
(Echo countermeasure)
0: 1
1: 2
1 Not used
2 V.8 protocol
0: Disabled
1: Enabled
3 ECM frame size
0: 256 bytes
1: 64 bytes
4 CTC transmission conditions
0: Ricoh mode (PPR x 1)
1: ITU-T mode (PPR x 4)
5 Modem rate for the next page
after receiving a negative code
(RTN or PIN)
0: No change 1: Fallback
6 Not used
Polarity change after DIS/NSF
7
detection
0: Disabled 1: Enabled
G3 Switch 04
No. FUNCTION
0–3 Training error detection
threshold
4–7 Not used
B465
CÓPIA NÃO CONTROLADA
0: The machine will hang up if it receives the same
DIS frame twice.
1: Before sending DCS, the machine will wait for the
second DIS which is caused by echo on the line.
Do not change the setting.
0: V.8/V.34 communications will not be possible.
Note:
Do not set to 0 unless the line condition is always
bad enough to slow down the data rate to 14.4 kbps
or lower.
Keep this bit at "0" in most cases.
When using ECM, the machine will choose a slower
modem rate after receiving PPR once (Ricoh mode)
or four times (ITU-T mode).
This bit is ineffective in V.34 communications.
1: The TX modem rate of the machine will fall back
before sending the next page if it receives a
negative code. This bit is ignored if ECM is in use.
Do not change the setting.
This bit should be set to "1" only to deal with
communication problems caused by certain types of
exchanger.
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 the training was successful.
Do not change these settings.
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COMMENTS
COMMENTS
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