asterisk users - Nov 2008 - question about connecting with Mobile Base Station

Hi,

Is it possible to connect Asterisk with a mobile base station to handle call
switching?  What kind of protocol will I need to use to convert to sip?

Any pointer or info will be greatly appreciated.

Best Regards,
Mark
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On Tue, Nov 18, 2008 at 22:30, mark morreny <markmorreny at gmail.com>
wrote:
> Hi,
>
> Is it possible to connect Asterisk with a mobile base station to handle
call
> switching?  What kind of protocol will I need to use to convert to sip?
>
> Any pointer or info will be greatly appreciated.
There are various devices. PCI GSM card, GSM to Ethernet, or the most
basic is GSM to analog, then you connect it to asterisk with e.g. X100
card or SPA3000.

Either the PCI or Ethernet devices should work very well -- since the
call from the GSM network continues to be digital. An analog adapter
will have a slower call setup time, can not support SMS or data and
might have echo issues and by definition of a digital-to-analog and
subsequent analog-to-digital conversion the quality of the call will
be worse (but probably not noticeable).

Here is one example: http://www.junghanns.net/en/GSM-PCI_produkt.html

Hi Andrew,

Thank you for your info.  I am actually looking for connecting mobile base
station with asterisk via E1.

Any idea on where I should start looking?

Thanks,
Mark

On Wed, Nov 19, 2008 at 1:03 PM, Andrew Joakimsen <joakimsen at
gmail.com>wrote:
> On Tue, Nov 18, 2008 at 22:30, mark morreny <markmorreny at
gmail.com> wrote:
> > Hi,
> >
> > Is it possible to connect Asterisk with a mobile base station to
handle
> call
> > switching?  What kind of protocol will I need to use to convert to
sip?
> >
> > Any pointer or info will be greatly appreciated.
>
> There are various devices. PCI GSM card, GSM to Ethernet, or the most
> basic is GSM to analog, then you connect it to asterisk with e.g. X100
> card or SPA3000.
>
> Either the PCI or Ethernet devices should work very well -- since the
> call from the GSM network continues to be digital. An analog adapter
> will have a slower call setup time, can not support SMS or data and
> might have echo issues and by definition of a digital-to-analog and
> subsequent analog-to-digital conversion the quality of the call will
> be worse (but probably not noticeable).
>
> Here is one example: http://www.junghanns.net/en/GSM-PCI_produkt.html
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
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Hi.

Probably you should use SS7.
It depends on your hardware.

On Wed, Nov 19, 2008 at 8:44 AM, mark morreny <markmorreny at gmail.com>
wrote:
> Hi Andrew,
>
> Thank you for your info.  I am actually looking for connecting mobile base
> station with asterisk via E1.
>
> Any idea on where I should start looking?
>
> Thanks,
> Mark
>
>
> On Wed, Nov 19, 2008 at 1:03 PM, Andrew Joakimsen <joakimsen at
gmail.com>wrote:
>
>>  On Tue, Nov 18, 2008 at 22:30, mark morreny <markmorreny at
gmail.com>
>> wrote:
>> > Hi,
>> >
>> > Is it possible to connect Asterisk with a mobile base station to
handle
>> call
>> > switching?  What kind of protocol will I need to use to convert to
sip?
>> >
>> > Any pointer or info will be greatly appreciated.
>>
>> There are various devices. PCI GSM card, GSM to Ethernet, or the most
>> basic is GSM to analog, then you connect it to asterisk with e.g. X100
>> card or SPA3000.
>>
>> Either the PCI or Ethernet devices should work very well -- since the
>> call from the GSM network continues to be digital. An analog adapter
>> will have a slower call setup time, can not support SMS or data and
>> might have echo issues and by definition of a digital-to-analog and
>> subsequent analog-to-digital conversion the quality of the call will
>> be worse (but probably not noticeable).
>>
>> Here is one example: http://www.junghanns.net/en/GSM-PCI_produkt.html
>>
>> _______________________________________________
>> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>>
>> asterisk-users mailing list
>> To UNSUBSCRIBE or update options visit:
>>   http://lists.digium.com/mailman/listinfo/asterisk-users
>>
>
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>   http://lists.digium.com/mailman/listinfo/asterisk-users
>
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On Nov 18, 2008, at 7:30 PM, mark morreny wrote:
> Hi,
>
> Is it possible to connect Asterisk with a mobile base station to  
> handle call switching?  What kind of protocol will I need to use to  
> convert to sip?
>
> Any pointer or info will be greatly appreciated.
>
> Best Regards,
> Mark
I've got a blog coming up on this shortly, but I'll comment that there  
is a BTS-like project that integrates with Asterisk.  Check out the  
"burning man" installation example where they ran Asterisk and OpenBTS
in the desert and enabled all the GSM cell phones in a 1km radius and  
uplinked them through Asterisk over a long-haul radio link:

   http://openbts.sourceforge.net/

They need programmers and funding!

JT

---
John Todd
jtodd at digium.com        +1-256-428-6083
Asterisk Open Source Community Director