How reliable is the output of show translation ? On 1/23/06, Enzo Michelangeli <[EMAIL PROTECTED]> wrote: > ----- Original Message ----- > From: "C F" <[EMAIL PROTECTED]> > Sent: Tuesday, January 24, 2006 2:20 AM > > > Thanks for the reply. According to those numbers, I would not rely on > > any of these systems to do transcoding, and if such is needed, I would > > rather have a bigger machine do it. This all means that the solid > > state system will just be a good geteway, but nothing more then that, > > of course I'm wrong to say *nothing* since it runs Asterisk, but I > > mean in terms of transcoding, and I'm guessing conferencing as well. > > Correct me if I'm wrong. > > Well, you may also build a solid state system with a very powerful CPU: > nothing prevents you from mounting an IDE CF adapter in place of a > conventional hard disk. Of course, if you plan for a lot of transcoding > you need CPU power as well; small embedded systems, especially if based on > CPU's lacking hardware Floating Point Unit, are not going to cut it with > heavy codecs (especially with the floating point implementations of the > latter). > > However, GSM is not very demanding, and to a lesser extent also G.726 > (which however requires higher bandwidth). The tiny WRT54GS I have at > home, running OpenWRT, has a not-so-macho 200 MHz Broadcomm 4712 CPU > (without FPU, so I didn't bother installing iLBC, LPC10 and Speex codecs) > but still appears to be capable of transcoding up to 13 channels at a time > (1000/(22+54)) between GSM and G.711: > > g723 gsm ulaw alaw g726 adpcm slin lpc10 g729 speex ilbc > g723 - - - - - - - - - - - > gsm - - 22 22 71 25 21 - - - - > ulaw - 54 - 1 51 5 1 - - - - > alaw - 54 1 - 51 5 1 - - - - > g726 - 101 49 49 - 52 48 - - - - > adpcm - 56 4 4 53 - 3 - - - - > slin - 53 1 1 50 4 - - - - - > > Of course, 13 is an absolute maximum and I wouldn't try to go beyond half > that figure, as the CPU has other things to do. > > Also, transcoding may be pushed to the edge, e.g. offloaded to devices > such as the Sipura ATA's (which can handle G.729: two channels at the same > time with the SPA-2100). In that case, Asterisk can act as pass-through, > and let the endpoints do the heavy work. > > Enzo > > P.S. Kris, have you got any "show translation" output for the Gumstix? > > _______________________________________________ > Astlinux-users mailing list > [email protected] > http://lists.kriscompanies.com/mailman/listinfo/astlinux-users > > Donations to support AstLinux are graciously accepted via PayPal to [EMAIL > PROTECTED] >
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