Re: [avr-gcc-list] avr to external modem interface

[Roger Furer]

I would suggest looking at AVR Freaks: http://www.avrfreaks.net/ They 
have several forums covering various topics.  A very useful resource.
Roger

> On 13 Dec 2006 at 16:29, andi suhandi wrote:
>
>
> > Does anyone know avr to external modem interface (for dial up internet) ?
> > Is it enough using three wire connection (Tx , Rx and Ground) ?
> > Do I have to use RTS, CTS, DSR, DTR and RI ?
>
>
> (This message does not belong on this list. The avr-chat list is a much better 
> choice)
> You can setup a Hayes compatible modem into a mode where you only need
> Rx, Tx and ground. However you then have to check the status by querying the
> modem using serial commands and then having to parse the results. If the
> modem is connected, you then have to switch to command mode, check the status
> and switch back to data mode to tx/rx data to/from the other modem. Much easier to have 
> a full compliment of signals required by a typical modem in it's default configuration.
>
> Regards
>   Anton Erasmus