Thanks, that's just what I needed to know. On Wednesday 06 December 2006 05:24, Michael Graves wrote: > Carla, > > There can be both performance and licensing issues. G.729a is the most > widely used high quality compressed codecs, but you needs to buy > licenses from Digium...$10 per stream. Digium provides this as a > service, passing the license fees on to the patent holder. > > It's CPU intensive so a Soekris Net4801 will only encode/decode two > calls using G.729a. I presently run Astlinux on a H-P T5700 thin client > with a 1 GHz CPU. It can transcode 5-6 calls. See voip-info.org for > "system dimensioning" to see details on larger systems. > > There are DSP cards that can add to suitable hosts to move the > transcoding activity off the host CPU. These are good but costly > solutions. > > As a practical matter if you're dealing with known ITSPs or peers then > you should be able to limit the codecs required and G.729s may not be > an issue. In fact ILBC may not be an issue. G.711a/u and GSM get it > done for a lot of providers. > > Michael > > -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Carla Schroder Linux geek and random computer tamer check out my Linux Cookbook! http://www.oreilly.com/catalog/linuxckbk/ best book for sysadmins and power users ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _______________________________________________ Astlinux-users mailing list [email protected] http://lists.kriscompanies.com/mailman/listinfo/astlinux-users
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