User's Manual

905U-D Radio Modem Module User Manual
Page 32 © May 2000
The module will automatically attempt to connect to the destination address.
For example, to set the destination address to 18 with repeater addresses 2 and 8, the
command would be - AT&Z2,8,18
If the destination address was to be 105 with no repeaters, the command would be
AT&Z105 or AT&Z105&W (this command also stores the change in permanent memory).
To clear the address values, use the command AT&Z<enter>
In modes 6 and 7, the 405U will only connect if the DTR signal is high (active). If the DTR
signal goes low (inactive), the 405U will break the connection. If low power mode is selected
at S9, then the 405U will also go to low power mode.
4.3.6 Connecting to a Remote Module – single dial
If the 405U unit is already connected to a remote module, then the connection should be
cancelled by using the “hang-up” command, ATH
To connect to a remote module, use the “dial” command
ATD <first repeater>,<second repeater>,. . . . . ,<destination>
For example, to set the destination address to 67 with repeater addresses 32 and 48, the
command would be - ATD32,48,67
The module will respond with one of the following messages :-
RINGING the module is in the process of connecting (only if “RINGING” is
selected at S10).
CONNECT the module has successfully connected
BUSY the destination module is already connected to another module
NO ANSWER the module was unable to connect to the destination address
If the destination address was to be 119 with no repeaters, the command would be ATD119.
To cancel or “hang-up” a connection, use the ATH command. The ATD and ATH
commands may be mixed. For example, ATHD119 (this command also clears the previous
connection before trying to make the new connection).
4.3.7 Reading Configuration Parameters
Host devices are able to read the value of configuration parameters by using the ATSn?
command, where "n" is the number of the configuration parameter.
4.3.8 Unit Test commands - AT&Tx
Test commands are available via the command AT&Tx, where x is the test number
requested. Many of these tests will be successful only during factory test. Refer to the
Diagnostics section of this manual (chapter 6) for a detailed listing of the test commands
available.
4.3.9 Version Information - ATI
The command ATI will result In a response from the 405U module with the software version
of the 405U. For example, “905U-D V1.09”