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Posted by Spam Catcher on April 26, 2007, 5:18 am
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@b40g2000prd.googlegroups.com:
> Hello. I am involved on a voip project that aims to deliver a complete
> voip solution using Asterisk software. We will develop the IP phones,
> ATAs, and a GUI for the users configure Asterisk. My tasks relate to
> the design and construction of the Ip phones and ATAs.
>
> Our aim is to develop cheap terminals, so they can get popular. For
> that, we plain to implement just the godec G.711 (PCM), as it require
> less computational processing, and so a more cheap BOM hardware.
>
> My problem is that honestly, I don't have much experience on designing
> embedded systems, and I believe this kind of project is not very
> simple. I am looking for some guidelines on how to obtain the hardware
> requirements on building this system. That`s why I am posting here.
>
> My assumptions right now is that I will not need a DSP chip, a normal
> microcontroller will be fine becouse the codec implementation cam be
> build on a separated chip, like texas instrument PCM codec chip
> TLV320AIC22C. So I believe all I need is a microcontroller with an
> ethernet interface for the network, and I2C and serial interface for
> the codec, and a RTOS for SIP and RTP implementation. Remember that we
> aim to buld the most cheap IP phone and ATA possible. Those are all
> assumptions for now.
Since there are hundreds (?) of IP Phone/ATA manufacturers out there...
have you considered buying their hardware and customizing it? Probably
cheaper than building your own.
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