i-modul Modem 336 LL
Operating Principle
5
Operating Principle
This chapter describes the basic procedures to operate and configure an
i-modul Modem
336 LL 3.0. In general, the i-modul Modem 336 LL 3.0 is configured and operated via AT
commands. You can enter these commands yourself with the help of a terminal program
and the AT command reference.
5.1
Operation with the Terminal Program
In general, any terminal program can be used. We recommend the program Ter-
aterm from T.Teranishi. It is available free of cost on the Internet at
http://hp.vector.co.jp/authors/VA002416/teraterm.html. You can use the program
"minicom" if you work in a Linux environment.
Note
Damage of the serial interface!
A possible direct connection of the serial interface of the
i-modul Modem 336 LL 3.0 with a typical RS232 interface
of a PC overloads components of the module due to the
higher voltage levels.
Use an RS232 level converter (e.g. MAX232) to adjust
both interface types correctly.
Configuring and operating the i-modul Modem 336 LL 3.0 with a terminal program
How to configure and operate the i-modul Modem 336 LL 3.0 with a terminal
program.
The i-modul Modem 336 LL 3.0 is connected to the PC and supplied with power.
A terminal program is installed on the PC.
1.
Start your terminal program.
2.
Select the serial port, to which your i-modul Modem 336 LL 3.0 is connected.
COM1 under Windows corresponds to /dev/ttyS0 under Linux.
3.
Connect the Reset input with GND for 1 second.
The i-modul Modem 336 LL 3.0 changes into configuration mode.
The message
NO CARRIER
is displayed in the terminal program.
4.
Type the character string
AT
into the terminal program. Complete the entry by
pressing the Enter key.
Each command input starts with
AT
and is completed with the Enter key.
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