BIT SWITCHES 30 November, 1999
4-30
4.2.5 G3 SWITCHES
G3 Switch 00
No FUNCTION COMMENTS
0
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 not in use
throughout 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 throughout 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 in use during memory
transmission.
3-6
Not used Do not change these settings.
7
Back to back test
0: Disabled
1: Enabled
Set this bit to 1 when you wish to do a back to
back test.
115 V model: Be sure to connect jumpers JP5
and JP6 on the NCU and remove BR1 before
doing the test.
220 V model: Be sure to apply DC voltage
between wires L1 and L2 on the NCU.
G3 Switch 01
No FUNCTION COMMENTS
0-3
Not used Do not change these settings.
4 DIS frame length
0: No limit
1: 4 bytes
1: Only the first 4 bytes in the DIS frame will
transmit (set to 1 if there are communication
problems with PC-based faxes, which cannot
receive extended DIS frames).
5
Not used Do not change this setting.
6
CED/ANSam emission
0: Enabled
1: Disabled
Do not change these settings, unless the any
communication problem is caused by the
CED/ANSam (V.34) transmission.
7
Not used Do not change this setting.
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 in non-
standard mode communication).
1-4
Not used Do not change these settings.
5 Use of modem rate history
when dialing using
Quick/Speed dials
0: Disabled
1: Enabled
0: Communications using Quick/Speed dials
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.
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