G3 Switch 02
No FUNCTION COMMENTS
0
G3 protocol mode used
0: Standard and
non-standard
1: Standard only
1: Disables NSF/NSS signals (these are used in
non-standard mode communication)
1
to
4
Not used Do not change the settings.
5
Use of modem rate history
during AI short protocol
(BRO only)
0: Disabled
1: Enabled
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.)
6
AI short protocol
(transmission and reception)
(BRO only)
0: Disabled 1: Enabled
Refer to Appendix B in the Group 3 Facsimile Manual
for details about AI Short Protocol.
(BR1: Do not change the settings.)
7
Not used Do not change the setting.
G3 Switch 03
No FUNCTION COMMENTS
0
DIS detection number
(Echo countermeasure)
0: 1
1: 2
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.
1 Not used Do not change the setting.
2
3
ECM frame size (BRO only)
0: 256 bytes
1: 64 bytes
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.
4
CTC transmission conditions
0: Ricoh mode (PPR x 1)
1: ITU-T mode (PPR x 4)
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.
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 setting.
7
August 7th, 1995 SERVICE TABLES AND PROCEDURES
BIT SWITCHES
4-29
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