Turn a modem into serial port? use a modem as serial port?

[7878]

Hi,

I am developing a product which communicates through an installation terminal program running at a notebook computer. The product uses its UART / serial port to communicate, the problem is that nowadays most notebooks don't have serial port. My question is that, I know most notebooks now have built-in internal modems, can I turn that modem into a serial port? or can I use it as a serial port? Thanks guys.


Jinghong

 

[IRstuff]

Why not USB? That would allow desktops as well to control your product

TTFN

 

[7878]

USB port on the equipment/device will add complexity and cost. If there is easy way to use serial port, we would like to use serial port rather than USB.

 

[killabyte]

i ve not worked in that way but im sure it could be, try to find a socket (program) which allow you to connect to the modem and to send data.

what level are you working at? are you developing the product or selling it?

a little more info would be helpful in order to be helpful...

regards

killa

 

[Myndex]

7878: You can't make a modem a serial port without a hardware change or hardware adapter. And that change will differ from brand to brand.


Regards,

Andy

 

[7878]

Andy: I guess you are right. Thanks Andy.

Killa: I am not trying to send data through modem. I need to send data through a serial port, I want to turn PC's modem port into a serial port just like other serial ports that a PC may have. We are developing products, and our products need to get information from PC through a serial port connection. I think Andy might be right and I cannot bypass the modem and use the serial port without hardware change.

But for a while I do hope that there will be some softare/firmware code that I can apply to the modem to disable its modem specific functions and feed the data it gets from the serial port right through to its RJ11 port.

 

[IRstuff]

What you have last suggested is not possible. The analog outputs of a modem are required to sustain a much harsher environment, being connected to external phone lines, than the circuitry internal to the modem.

Therefore, there would never be a means of connect the serial UART output to the modem output under normal circumstances.

TTFN

 

[jloram]

There are very inexpensive (<$20US) USB <-> Serial port converters. Plug it into your computer's USB port, install the software drivers that comes with the product, and bingo; you have a serial port on your computer.

regards, -john-