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Re: [Linphone-developers] PSTN Calls with Blackberry Linphone.

From: Alastair Johnson
Subject: Re: [Linphone-developers] PSTN Calls with Blackberry Linphone.
Date: Sat, 15 Oct 2011 11:11:52 +0100
User-agent: KMail/1.13.7 (Linux/2.6.39-gentoo-r3; KDE/4.6.5; x86_64; ; )

On Thursday 13 October 2011, Anurag Mishra wrote:
> Hi All,
> Please help me i am facing one issue in Blackberry linphone We are uisng
> your application for IP to IP calling and we have tested it work very fine.
> but we are not able to make IP to PSTN calls using your Blackberry
> Linphone.
> We have opensips and Asterisk based servers. We have install AMR-NB codec
> on our opensips server and we are able to make IP-IP calls.  AMR-NB codec
> is not supported by our termination provider due to this we are not able
> to make IP to PSTN calls. Basically we are looking to convert the AMR-NB
> codec to some other codec like G711 or GSM in server.
> Blackberry Linphone client(AMR-NB codec) ===> Opensips/Asterisk Server
> (Codec Convertor from AMR-NB to G711 or GSM) ==> (Codec G711 or GSM)
> Termination Provider. (PSTN).

That should work with asterisk. I think you'll have to use the canreinvite=no 
option in the asterisk sip config to keep asterisk in the dignal path.

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