Re: [Openbts-discuss] EGSM at 880 MHz

[Harvind S. <hs...@ke...>]

Chris,

There's nothing in the hardware or the transceiver that would prohibit
operation at EGSM frequencies.

--- Harvind

On Thu, 2010-04-15 at 18:43 +0200, Chris Volkmar wrote:
> Hello,
> 
>  
> 
> I have serious troubles in getting my OpenBTS (Kinder release) to work
> with EGSM. Our university has the permission to use two EGSM Channels
> (downlink  929,8 MHz and uplink 884,8 MHz). We patched the code to
> ensure that the ARFCN number matches with these frequencies and ran
> the station after compiling. 
> 
> We saw the downlink spectrum on a spectrum analyzer. Everything seemed
> to be correct….
> 
> BUT we are not able to connect to the cell. We have three different
> cell phones and none of them works. 
> 
> There is no problem by the way if we use GSM900 frequencies and their
> corresponding ARFCN’s…
> 
> My questions are if anybody knows this issue and if it’s possible that
> we’re just using the wrong cell phones. 
> 
> There is no uplink on the spectrum analyzer… Technically the USRP
> (rev. 2) device should accept that frequencies, shouldn’t it?
> 
>  
> 
> I would be very very grateful for any kind of answer anyone might give
> J
> 
>  
> 
> I’m thanking you all in anticipation,
> 
>  
> 
> Chris Volkmar
> 
>  
> 
>  
> 
> 
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