There is a cat box on the market that after a cat visits the box, it rakes the cat litter so the cat will have a pleasant experience the next time. From my understanding, this product will soon be available in a "internet model", so that the cat owner can see it's activity log while at work. The ability to leave a voice message for the cat, to be delivered after the cat's next visit, is still under discussion. I did something similar to what you want to do, except it was before the internet and just used a store bought external modem. When I detected a "Ring" I would answer the phone and say "This is a restricted site and unauthorized access is prohibited". Then would wait for the proper password to be entered. Saying nothing until the correct password was received. If after two tries at entering the password, both being incorrect, I would still say nothing, but would ignore any more data coming from the modem and start looking for loss of carrier signal from modem. When I received that, would hang up the modem. (Good luck hacking that!) Bill ----- Original Message ----- From: "Eron" To: Sent: Thursday, August 01, 2002 5:29 PM Subject: [PIC] Connecting 16F877 on internet by PSTN Hello friends, I4m working in a project that demands to connect a 16F877 to a web server computer dialy to send some data colected by PIC during the day. I was thinking in use a Seiko S-7600 TCP-IP Stack + Modem Chip (Like CML Micro CMX868) to connect by PSTN. So, I heard that Seiko will discontinue the S-7600 part and I felt discouraged. Is this information true?? How can I implement a TCP-IP Stack?? There are others chips for this purpose (like S-7600) having conectivity with PSTN modems?? Any suggestions are welcome. Hugs, Eron. -- -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.