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Re: [dispatch] SIP and GSM/UMTS with OpenBTS

Kurtis Heimerl <kheimerl@cs.berkeley.edu> Fri, 14 February 2014 16:56 UTC

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From: Kurtis Heimerl <kheimerl@cs.berkeley.edu>
Date: Sat, 15 Feb 2014 01:55:36 +0900
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To: Ivo Sedlacek <ivo.sedlacek@ericsson.com>
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Subject: Re: [dispatch] SIP and GSM/UMTS with OpenBTS
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As I mentioned earlier, there are operators with licenses. It's relatively
easy to get in some countries for small installations and low-power
operation is straight-up unlicensed in others. I'm not sure why you're
harping on this.


On Fri, Feb 14, 2014 at 4:57 PM, Ivo Sedlacek <ivo.sedlacek@ericsson.com>wrote:

> Hello Tim and all,
>
> > Apples and oranges - If I want a continent spanning, roaming capable
> billion dollar GSM network, then I need an IMS system.
> > If I want an Um to SIP gateway I can run off solar power and hang in a
> tree, I'll go for an openBTS like solution.
>
> If you want an Um to SIP gateway (for whatever purpose), you need a
> license.  To get a license, you will need to satisfy regulator's
> requirements.
>
> You still have not provided any references to regulators' document stating
> that a GSM band is free in any country.
>
> You still have not explain how such BTS "running off solar power and
> hanging in a tree" does not interfere with other BTSs hanging on the next
> tree.
>
> So, I am afraid, the BTS and Um To SIP gateway hanging will be switched
> off pretty quickly due to being illegal or causing interferences with other
> GSM nodes.
>
> Kind regards
>
> Ivo Sedlacek
>
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