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Marten Christophe technosabby at gmail.comHi Peter, I hope you are aware of the OLPC project, because you seem to share some of the same goals. See http://laptop.org/ > > Yes I'm .... and HCL is taken up into manufacture it > setup a USRP1 based BTS .. which might cover near by villages also. With 11 dbi Anettena and appropriate PA . we can do it up 5 to 10 KM ( send a mail to Ettus) >Did you research other RF interfaces than the one used by GSM? Yes , and are legacy . need higher bandwidth. and Why I'm not thinking for Armature radio or Air broadcasting .. it is only One way..and other drawbacks do you have any suggestion ? >>> Define cheap and small bandwidth? They have very cheap equipments ( out of store almost) for providing low bandwidth. like 64 Kbps, 54 Kbps even 9 Kbps RF interface. on demand they can supply. you will be kind enough you you give me other cheap solution after all its all for charity.. rather then GSM , and one more cause to attract me here is in some places we have GSM infrastructure and , Govt and some private operator will let us user some part of it. Kind Regards, -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/baseband-devel/attachments/20101006/59909001/attachment.htm>