Gestetner B147, Service Manual

Page: 853 / 1081

BIT SWITCHES
SM 59 B603
Fax Op
tion
B60
3
3.2.5 G3-1 SWITCHES
G3-1 Switch 00 SP No. 1-105-001
No FUNCTION COMMENTS
0
to
1
Monitor speaker during
communication (tx and rx)
Bit 1 Bit 0 Setting
0 0 Disabled
0 1 Up to Phase B
1 0 All the time
1 1 Not used
(0, 0): The monitor speaker is disabled all through
the communication.
(0, 1): The monitor speaker is on up to phase B in
the T.30 protocol.
(1, 0): Used for testing. The monitor speaker is on
all through the communication. Make sure that you
reset these bits after testing.
2 Monitor speaker during
memory transmission
0: Disabled 1: Enabled 1: The monitor speaker is enabled during memory
transmission.
3-7 Not used Do not change the settings.
G3-1 Switch 01 SP No. 1-105-002
No FUNCTION COMMENTS
0-3 Not used Do not change the settings.
4 DIS frame length
0: 10 bytes 1: 4 bytes
1: The bytes in the DIS frame after the 4th byte will
not be transmitted (set to 1 if there are
communication problems with PC-based faxes
which cannot receive the extended DIS frames).
5 Not used Do not change the setting.
6 CED/ANSam transmission
0: Disabled
1: Enabled
Do not change this setting, unless the
communication problem is caused by the
CED/ANSam transmission.
7 Not used Do not change the setting.
G3-1 Switch 02 SP No. 1-105-003
No FUNCTION COMMENTS
0 G3 protocol mode used
0: Standard and non-standard
1: Standard only
Change this bit to 1 only when the other end can
only communicate with machines that send T.30-
standard frames only.
1: Disables NSF/NSS signals (these are used in
non-standard mode communication)
1-4 Not used Do not change the settings.
5 Use of modem rate history for
transmission using
Quick/Speed Dials
0: Disabled
1: Enabled
0: Communications using Quick/Speed Dials always
start from the highest modem rate.
1: The machine refers to the modem rate history for
communications with the same machine when
determining the most suitable rate for the current
communication.
6 AI short protocol (transmission
and reception)
0: Disabled 1: Enabled
Refer to Appendix B in the Group 3 Facsimile
Manual for details about AI Short Protocol.
7 Short preamble
0: Disabled 1: Enabled
Refer to Appendix B in the Group 3 Facsimile
Manual for details about Short Preamble.