asterisk users - Jul 2007 - Connecting GSM Phone to Asterisk Box

Hi All,

I have a telephony project for which I need 
to build a prototype to demo for management.
The prototype must work on a GSM phone network.

In the demo system, a call from GSM phone comes
into the demo box. The demo box runs CallWeaver.
Callweaver picks up the GSM call, answers it and
plays a sould file, then dials out to a second GSM
phone somewhere and connects them so they talk.

My question are these:

1. Is this a job for Callweaver/asterisk system?

2. if not, what package out there would handle this?

I was reading the Asterisk doc and it mentions that
a modem could be used with an Asterisk system, but 
does not show how it can be configured to function in
the system. Does anyone here know how?

Thanks for your answers.

Jeng
       
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On 7/31/07, Jeng Yu <jengyu2007 at yahoo.co.uk>
wrote:
>
> Hi All,
>
> I have a telephony project for which I need
> to build a prototype to demo for management.
> The prototype must work on a GSM phone network.
>
> In the demo system, a call from GSM phone comes
> into the demo box. The demo box runs CallWeaver.
> Callweaver picks up the GSM call, answers it and
> plays a sould file, then dials out to a second GSM
> phone somewhere and connects them so they talk.
>
> My question are these:
>
> 1. Is this a job for Callweaver/asterisk system?
>
> 2. if not, what package out there would handle this?
>
> I was reading the Asterisk doc and it mentions that
> a modem could be used with an Asterisk system, but
> does not show how it can be configured to function in
> the system. Does anyone here know how?

There are various PCI and Ethernet GSM interfaces that should work with
Asterisk. These would be your best choice in terms of reliability and
performance for a production system. It wouldn't hurt to have a fixed,
semi-directional, antenna pointed to the tower either.

I wouldn't recommend for a production system, but you can also use a GSM
->
Analog adapter such as the "CellDock" or "DockNTalk" I think
some people
call this "Tellular" and also somewhere is chan_bluetooth which allows
you
to place calls through a bluetooth mobile.
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On Tue, 31 Jul 2007, Jeng Yu wrote:
> Hi All,
> 
> I have a telephony project for which I need
> to build a prototype to demo for management.
> The prototype must work on a GSM phone network.
> 
> In the demo system, a call from GSM phone comes
> into the demo box. The demo box runs CallWeaver.
> Callweaver picks up the GSM call, answers it and
> plays a sould file, then dials out to a second GSM
> phone somewhere and connects them so they talk.
> 
> My question are these:
> 
> 1. Is this a job for Callweaver/asterisk system?
> 
> 2. if not, what package out there would handle this?
You need 2 more GSM phones - ones with an Ethernet connection talking SIP

Eg. Google for:

MV-372 SIP VoIP GSM Gateway

Which is a 2-SIM unit which will do just what you want with Asterisk.

The other alternative is to simply use 2 analogue lines and call an 
ordinary analogue number and put a 2-port analogue card in the asterisk 
box connected to the 2 analogue lines - one line naswers the call, then it 
plays the sound file, then dials the other phone over the 2nd analogue 
line.

Or do this via VoIP.

Gordon