[Asterisk-Dev] RTP to IP Phone

Chris Teesdale cjt at philips.org.uk
Thu Dec 15 09:35:45 MST 2005


Hi,

There is a Open source IP Phone called Twinkle.  You can find it at
http://www.twinklephone.com/.
Im not sure if they convert the ULAW and other formats to linear PCM but
its worth a look.  

Good Luck with your Soft phone

Regards
Chris Teesdale
I.T. / IP Telephony Development
Philips®
Tel : 01325 384394 ex 246
fax : 01325 383876
Email : cjt at philips.org.uk
Web : http://www.philips.org.uk



On Thu, 2005-12-15 at 07:41 -0800, ha i wrote:

> Hi Guys,
> 
> I am in the process of developing a soft phone that
> works with asterisk supported protocols. I need some
> help on decoding the ULAW RTP data for the client
> machine (laptop/desktop) speaker device. Like
> technology (Java Sound, JMF etc...) to use and
> encoding/decoding techniques for RTP data.
> 
> For example Xlite does very nice job converting ULAW
> data into Linear PCM. Obviously that code is not open
> source. So can you give me some pointers on where to
> look for???
> 
> Thanks,
> Haas
> 
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