If you can stand a bit of a shift in development, you should check out Microchip's TCP/IP stack. The CD is available off their website. The only problems for your application are that it requires an 18 series chip. It's also entirely in C, which may or may not be a problem for you. I agree, I am also disapointed that the Seiko chip is going away. I would love to see a simple, cost effective solution to using Ethernet and TCP/IP with PICs. Hope this helps, Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams Eron wrote: > 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. > > How can I implement a TCP-IP Stack?? There are others chips for this purpose (like S-7600) having conectivity with PSTN modems?? -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.