User manual

Copyright © Dr Robot Inc. 2006
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When an active connection is in effect, the unit transfers data and does not process
commands received from the serial interface.
When a connection is terminated or lost, the unit reverts to command mode. When
an active connection is in effect, the unit terminates the connection if it receives the
following sequence from the attached serial device:
. No serial data is received for one second.
. The character sequence +++ is received, with no more than one second
between each two characters.
. No serial data is received for one second after the last + character. At this time,
the unit responds affirmatively per the selected echo/response mode.
. The character string ATH is received, terminated with a carriage return. The unit
responds affirmatively according to the selected echo/response mode and drops
the network connection. The serial interface reverts to accepting command
strings.
If this sequence is not followed, the unit remains in data transfer mode.
Table IV.12 Modem Mode Commands
Modem Mode Command Function
ATDTx.x.x.x,pppp or
ATDTx.x.x.x/pppp
Makes a connection to an IP address (x.x.x.x) and a
remote port number (pppp).
ATDTx.x.x.x
Makes a connection to an IP address (x.x.x.x) and the
remote port number defined within the unit.
ATD0.0.0.0
Forces the unit into Monitor Mode. Uses remote IP
address and port settings to initiate a connection.
ATD or ATDT
Forces the unit into Monitor Mode. Uses remote IP
address and port settings to initiate a connection.
ATDx.x.x.x
Makes a connection to an IP address (x.x.x.x) and the
remote port number defined within the unit.
ATH Hangs up the connection (Entered as +++ ATH ).
ATS0=n Enables or disables connections from the network
going to the serial port.
n=0 disables the ability to make a connection from the
network to the serial port.
n=1-9 enables the ability to make a connection from the
network to the serial port.
n>9 is invalid
ATEn
Enables or disables character echo and responses.
n=0 disables character echo and responses.
n=1 enables character echo and responses
ATVn Enables 1-character response or full verbose.
n=0 enables 1-character response.
n=1 enables full verbose.
Note: The unit recognizes these AT commands as single commands such as ATE0 or ATV1; it