30 November, 1999 BIT SWITCHES
4-25
Service
Tables
4.2.4 COMMUNICATION SWITCHES
Communication Switch 00
No FUNCTION COMMENTS
0
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 Not used
These bits determine the compression
capabilities declared in phase B (handshaking)
of T.30 protocol.
2
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 Not used
These bits determine the compression
capabilities used in the transmission and
declared in phase B (handshaking) of T.30
protocol.
4-7
Not used Do not change these settings.
Communication Switch 01
No FUNCTION COMMENTS
0
ECM
0: Disabled 1: Enabled
If this bit is 0, ECM is switched off for all
communications.
1
Not used Do not change this settings.
2
3
Wrong connection prevention
method
Bit 3 Bit 2 Setting
0 0 None
0 1 8 digit CSI
1 0 4 digit CSI
1 1 CSI/RTI
(01) - The machine will not transmit if the last 8
digits of the received CSI do not match the last 8
digits of the dialed telephone number. This does
not work for manual dialing.
(10) - The same as above, except that only the
last 4 digits are compared.
(11) - The machine will not transmit if the other
end does not identify itself with an RTI or CSI.
(00) - Nothing is checked; transmission will
always go ahead.
Note: When enabling wrong connection
prevention, disable AI short protocol.
4 Operator call if no response is
received in reply to NSF/DIS
0: Disabled 1: Enabled
Set this bit to 1 if the user expects to receive
telephone calls at the same number that the
machine is connected to. The machine will then
alert the user if a phone call comes in.
5
Not used Do not change the setting.
6
7
Maximum printable page
length available
Bit 7 Bit 6 Setting
0 0 No limit
0 1 B4
1 0 A4
1 1 Not used
The receiving terminal informs the transmitting
terminal of the setting determined by these bits
in the pre-message protocol exchange (in the
DIS/NSF) frames.
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