Think about it in this way. Each GSM (don't know about CDMA's) Base Transceiver Station costs around 100,000 USD to set up, probably much more for CDMA So if what I said can be technically implemented we can have a far cheaper mobile infrastructure (not talking about the licensing stuff) If that is applied to the other equipments involved in a mobile network (like the BSC, HLR and the MSC), think how cheap would that be. I am sure there are many more advantages of setting up such a system. Am not also a GSM/CDMA guy but I happened to work for an ISP that is also offering mobile phone services and that made me ask if it is possible to do it. Thanks ________________________________ From: Greger V. Teigre [mailto:greger@teigre.com] Sent: Monday, July 10, 2006 11:59 AM To: Aimable Habiyakare Cc: serusers(a)iptel.org Subject: Re: [Serusers] Open source GSM/CDMA network I'm very curious to know why you want to do that? While reusing SIM-identities on various access control points make sense if you have customers with SIM (a WLAN/3G phone could then easily roam on a service provider WLAN footprint, pending support for it in the phone, i.e. pulling out SIM-data to be used in 802.1x), I cannot really see the reason for doing what you propose?! (I'm not a GSM/CDMA person, so pardon me for being ignorant) g-) Aimable Habiyakare wrote: Hi all serusers; I have been using SER for a couple of years now (from 2004) and I have been really impressed. It has landed me more than 2 good jobs and when combined with Asterisk, you ask yourself what Telcos without it do!!!! Given all SIP related software and ideas that are there, I have been asking myself this question: Is it possible to design a GSM/CDMA Base Transceiver Station using Software Defined Radio (for signal acquisition and processing + some SER functions,) A GSM switch (done through SER and/or Asterisk) A GSM HLR,(Home Location Register and VLR, supposing that SER with GSM auth module act as such) which is I think a set of databases and some interfaces. This may sound stupid but I thought maybe someone has thought abt sth like that? The idea was provoked by these 2 links http://www.mah.priv.at/siptrust/doit/sim-summary.html http://cvs.berlios.de/cgi-bin/viewcvs.cgi/ser/gsm_auth/ what do you think? Thanks ________________________________ _______________________________________________ Serusers mailing list Serusers(a)lists.iptel.org http://lists.iptel.org/mailman/listinfo/serusers