© Microhard Systems Inc.
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5.0 AT Command Line Interface
5.1 AT Command Overview
AT Commands can be issued to configure and manage the IPn4G, via the front serial port (COM1), or by
TCP/IP (telnet).
5.1.1 Serial Port
To connect and access the AT Command interface on the IPn4G, a physical connection must be made on
the RS232 DB9 serial port on the front of the IPn4G labeled ‘COM1’. A terminal emulation program
(Hyperterminal, Tera Term, ProComm, Putty etc) can then be used to communicate with the IPn4G. The
port settings of this port can be modified by changing the settings of COM1, in the configuration menus.
Image 5-1: COM1 Port Settings
Default Settings:
Baud rate:
115200
Data bits:
8
Parity:
None
Stop Bits:
1
Flow Control:
None
Once communication is established, a login is required to access the AT Command interface, once logged
in, the AT Command Line Interface menu is displayed. Type “?” or Help to list the menu commands.
Default Settings:
IPn4G login:
admin
Password:
admin
Image 5-2: AT Command Window
