If the
Numeric Response
option is in effect, the unit responds to an unrecognized command
string that is otherwise formatted correctly with a "0" message and takes no further action.
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 se++ 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.
Figure 8-10
Modem Mode Commands
Modem Mode
Command
Function
ATDTx.x.x.x,pppp or
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 if a remote IP address and port number are
defined within the unit.
ATD or ATDT
Forces the unit into Monitor Mode if a remote IP address and port number are not
defined within the unit.
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>1-9 is invalid.
Summary of Contents for NetDirect
Page 1: ...NetDirect User Guide ...
