RS-232 Modem "Emulator"

[PLieutenant]

I want to connect a device with SPECIFIC AT commands (serial interface) to an equipment that is designed to connect to a standard modem with standard AT commands (ATD, ...)

To this easily, I am looking for a hardware device (or software) that:
1. receives on one input serial port the AT commands to establish a dial up connection (such as ATD, ...)
2. issues specific AT commands (configurable) to output serial port
3. issues the normal response of the modem (such as CONNECT 9600...) to the input port
4. link the two serial ports when connected

In other words, I want to fake my equipment, by making it think that it is talking with a modem, whereas it is another type of device that is connected (which uses other AT commands)

Do someone know if such a device exists?
Thanks a lot for your help!

Pierre

 

[nbucska]

the "device" can be a microcontroller or even a PC but it
must have 2 serial ports (in and output). If this is temporary, use your PC -- it needs a simple program and no
modification.

What generates the signal ? can the function of the "device"
incorporated in either this "source" or in the "equipment"?

If you need more help, I need more details, exact description etc.

<nbucska@pcperipherals.com>

 

[PLieutenant]

Of course a PC or a microcontroller can do what I want.
But, I am looking for a "plug & play" solution, which does not need any new development.

In fact, the objective is to connect my equipment to a GPRS modem instead of a GSM modem. I know that it exist GPRS modems that includes the TCP/IP stack. These modems setup automatically the connection with the TCP server, and forwards what they receive on the serial port to the TCP server in IP packets. However theses "intelligent" modems require other AT commands and do not manage the 'ATD....'-like commands and 'CONNECT...'-like responses.

I am sure that such devices exist. Do you have a manufacturer, model number?
Thanks again

P.