Result Code Selection And Call Progress Monitoring Control; C Circuit 109 (Received Line Signal Detector) Behaviour; D Circuit 108 (Data Terminal Ready) Behaviour - Nokia 30 GSM Connectivity Terminal At Command Manual

4.1.7 X Result code selection and call progress monitoring control
Command
Set X[0]
X1
X2
X3
X4
X5
The X command defines the call progress result codes that are sent from the Nokia 30
terminal to the DTE. When BUSY, NO ANSWER, DELAYED or BLACKLISTED are not
enabled, so NO CARRIER is used instead. When CONNECT <rate> with a correct data
<rate> is not enabled, CONNECT is used instead. This command only affects the
presentation of the result codes mentioned in this table.
4.1.8 &C Circuit 109 (received line signal detector) behaviour
Command
Set &C[0]
&C1
The &C command determines how the state of circuit 109 relates to the detection of a
received line signal from the remote end. Changing the parameter will take effect
immediately in both command and online command states.
In the &C1 mode of operation, circuit 109 is on during the connection. Circuit 109 is also
known as a DCD or carrier signal.
4.1.9 &D Circuit 108 (data terminal ready) behaviour
Command
Set &D[0]
&D1
&D2
&D3
The &D command determines how the DCE responds when circuit 108/2 is changed from
ON to OFF during the online data state. Circuit 108 is also known as the DTR signal.
Description
OK, CONNECT, RING, NO CARRIER, ERROR codes enabled
Also CONNECT 1200, CONNECT 2400 enabled
Same as value 1
Also BUSY enabled
Also NO ANSWER enabled
Also CONNECT 4800 (or higher data rates), CARRIER, DELAYED,
BLACKLISTED enabled
Description
Always on
Normal operation
Description
DTR on->off ignored
DTR on->off causes transition to online command state if a call is in progress
DTR on->off causes hang up
DTR on->off causes hang up and performs reset, like Z
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