User's Manual

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TECHNICAL MANUAL
Telit GM862 PCS
Tri Band GPRS Data Terminal System Rev.1
2.4.2.7 &D - data terminal ready (DTR) control
&D – data terminal ready (DTR) control
Execute command
Read command
Write command
AT&D <n>
Controls the GM862-PCS behaviour to the RS232 DTR transitions.
Parameter:
<n> = 0 DTR transitions are ignored.
<n> = 1 when the GM862-PCS is connected, the high to low transition of
DTR pin sets the device in command mode, the current connection is NOT
closed.
<n> = 2 when the GM862-PCS is connected , the high to low transition of
DTR pin sets the device in command mode and the current connection is
closed.
Note: if AT&D2 command is issued, the device does not answer to incoming
calls if DTR is low, even if ATA command is given.
Test command
Example
Reference V25ter
SW release Version A
2.4.2.8 &K - flow control
&K – flow control
Execute command
Read command
Write command
AT&K <n>
Controls the RS232 flow control behaviour.
Parameter.
<n> = 0 – disabled
<n> = 1 - only CTS active, Hardware mono-directional
<n> = 2 - XON/XOFF software mono direction
<n> = 3 - RTS/CTS active, Hardware bi-directional (default)
<n> = 4 - XON/XOFF, Software bi-directional with filtering
<n> = 5 - XON/XOFF, Software bi-directional without filtering (Pass
Through)
<n> = 6 - RTS/CTS active, Hardware bi-directional & software
XON/XOFF (bi-directional) with filtering
Test command
Example
Reference
SW release Version A