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August 7th, 1995
G3 Switch 02
No
FUNCTION
G3 protocol mode used
0: Standard and
0
non-standard
1: Standard only
1
Not used
to
4
Use of modem rate history
during AI short protocol
(BRO only)
5
0: Disabled
1: Enabled
AI short protocol
(transmission and reception)
6
(BRO only)
0: Disabled 1: Enabled
Not used
7
G3 Switch 03
No
FUNCTION
DIS detection number
(Echo countermeasure)
0
0: 1
1: 2
1
Not used
2
ECM frame size (BRO only)
3
0: 256 bytes
1: 64 bytes
CTC transmission conditions
0: Ricoh mode (PPR x 1)
4
1: ITU-T mode (PPR x 4)
Modem rate used for the
next page after receiving a
5
negative code (RTN or PIN)
0: No change 1: Fallback
6
Not used
7
SERVICE TABLES AND PROCEDURES
COMMENTS
1: Disables NSF/NSS signals (these are used in
non-standard mode communication)
Do not change the settings.
0: Communications using AI short protocol always start
with the highest modem rate.
1: The machine uses the modem rate history for
communications with the same machine when
determining the most suitable rate for the current
communication.
(BR1: Do not change the settings.)
Refer to Appendix B in the Group 3 Facsimile Manual
for details about AI Short Protocol.
(BR1: Do not change the settings.)
Do not change the setting.
COMMENTS
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.
1: The machine transmits with a frame size of 64
bytes. Set this bit to 1 when the other terminal only has
a 64 byte frame size.
When using ECM, the machine will choose a slower
modem rate after receiving PPR once (Ricoh mode) or
four times (ITU-T mode).
ITU-T: New acronym for the CCITT.
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.
Do not change the setting.
4-29
BIT SWITCHES
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