[Asterisk-Users] iaxy vs sipura

[Brian West]

ADPCM != G.726 they are a little bit different.  codec_adpcm.c and
codec_g726.c

bkw

> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-
> bounces at lists.digium.com] On Behalf Of Benjamin on Asterisk Mailing Lists
> Sent: Tuesday, September 07, 2004 10:24 PM
> To: Lyle Giese
> Cc: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] iaxy vs sipura
> 
> On Tue, 7 Sep 2004 15:40:00 -0500, Lyle Giese <lyle at lcrcomputer.net>
> wrote:
> > Hmmm, I thought 56k modems were 56k outbound only and maxs at 33k
> inbound
> > or did the standard change again when I wasn't looking?
> >
> > And besides when did you get better than 28.8 through a hotel PBX?  >33k
> > with a 56k modem in the real world is not that common.
> 
> Don't mix up the content of different posts.
> 
> In one post, I explained how I used IAX and ILBC successfully on a sub
> 20k dialup link in Egypt (that was not a hotel but an office, BTW) and
> in a different paragraph I mentioned hotels in foreign countries as
> one of many locations where things can go funny.
> 
> In another post, I responded to a question whether or not it might be
> possible to use an IAXy on a 33k or 56k dialup connection. There was
> no mentioning of any hotels and I did say that I have not used an IAXy
> myself. My comment that the IAXy *should* work on a 56k link was based
> on the fact that it supports ADPCM and if you check out the specs of
> most DSPs which do ADPCM you will find that they do 16, 24, 32 and 40
> kbps, although the ITU ADPCM recommendation (G.726) talks about 32
> kbps. Which chip the IAXy uses and which modes that chip supports, I
> guess only Digium can tell you. If you want to be absolutely sure,
> then you may just want to try it out.
> 
> In fact, I think it would be very welcome if somebody with actual
> experience testing the IAXy on the road posted some feedback here.
> There is nothing that beats testing in the field.
> 
> rgds
> benjk
> 
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