BIT SWITCHES 9 March 2004
3-22
3.2.4 COMMUNICATION SWITCHES
Communication Switch 00 SP No. 1-104-001
No FUNCTION COMMENTS
0
to
1
Compression modes available
in receive mode
Bit 1 0 Modes
0 0 MH only
0 1 MH/MR
1 0 MH/MR/MMR
1 1 MH/MR/MMR/
JBIG
These bits determine the compression capabilities
to be declared in phase B (handshaking) of the T.30
protocol.
2
to
3
Compression modes available
in transmit mode
Bit 3 2 Modes
0 0 MH only
0 1 MH/MR
1 0 MH/MR/MMR
1 1 MH/MR/MMR/
JBIG
These bits determine the compression capabilities
to be used in the transmission and to be declared in
phase B (handshaking) of the T.30 protocol.
4
Not used Do not change the setting.
5 JBIG compression method:
Reception
0
: Only basic supported
1: Basic and optional both
supported
Change the setting when communication problems
occur using JBIG compression.
6
JBIG compression method:
Transmission
0: Basic mode priority
1: Optional mode priority
Change the setting when communication problems
occur using JBIG compression.
7
Not used Do not change the settings.
Communication Switch 01 SP No. 1-104-002
No FUNCTION COMMENTS
0
ECM
0: Off 1: On
If this bit is set to 0, ECM is switched off for all
communications.
In addition, V.8 protocol and JBIG compression are
switched off automatically.
1-5
Not used Do not change the settings.
6
to
7
Maximum printable page length
available
Bit 7 6 Setting
0 0 No limit
0 1 B4 (364 mm)
1 0 A4 (297 mm)
1 1 Not used
The setting determined by these bits is informed to
the transmitting terminal in the pre-message
protocol exchange (in the DIS/NSF frames).
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