Hello! Dumpolid Exeplish schrieb: > I am just being inquisitive, is it possible to build a GPRS modem > (2G/3G) out of Sorkris?
Do you mean a software solution with just a little RF hardware? That is a nice idea but unfortunately there aren't any open-source GSM/GPRS protocol stacks available. Even projects like Openmoko use black-box GSM modules and don't run a GSM protocol stack on the main processor. The main reasons are the very high costs for a GSM protocol stack which are starting with about 1.000.000 EUR/$, and the type approval for the finished solution. You have to keep in mind that GSM doesn't operate in the free ISM frequency ranges (e.g. 433MHz, 868MHz, 2,4GHz) like W-LAN or Bluetooth; depending on the country it can be a felony to use non-ISM RF equipment without type approval. Unfortunately also the needed equipment (protocol tester etc.) to prepare a product for GSM type approval is extraordinary expensive. You can either buy it (200k$ to 5M$) or rent it (up to 1k$ PER HOUR!). Although I might sound a little pessimistic, I would be really happy if someone started an open-source GSM/GPRS/UMTS project, and I would be happy if I could participate in it! With best regards Andreas Schweigstill (former GSM developer for Hagenuk und Cetelco) -- Dipl.-Phys. Andreas Schweigstill Schweigstill IT | Embedded Systems Schauenburgerstraße 116, D-24118 Kiel, Germany Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436 Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/ _______________________________________________ Soekris-tech mailing list [email protected] http://lists.soekris.com/mailman/listinfo/soekris-tech
