[asterisk-users] howto debug bad iax voice quality?

[Steve Totaro]

On Fri, Apr 4, 2008 at 9:43 PM, sean darcy <seandarcy2 at gmail.com> wrote:
> John Beaman wrote:
>  >
>  > John Beaman
>  > Telecom Specialist II
>  > Voice Telecommunications Services Department.
>  > Good Samaritan National Campus
>  > 605-362-3331
>  >
>  >>>> seandarcy2 at gmail.com 4/4/2008 3:23:49 PM >>>
>  > I'm set up to call 3 digit extensions at the office ( running 1.4.13)
>  > from home ( 1.6.0 beta7) over iax. 1 out of 3 times the call breaks up,
>  > but only in the home -> office direction. office -> home always sounds good.
>  >
>  > If it were a poor internet connection, I'd expect both sides of the
>  > conversation to be poor. Not surprisingly, each side can ping the other
>  > in the same time - 25-30ms. Both servers have the iax jitterbuffer on.
>  >
>  > I could always use a lower bit-rate codec ( now using mu-law ), but I
>  > don't see how it could be a "one way" bit-rate issue.
>  >
>  > Any suggestions appreciated.
>  >
>  > sean
>  >
>  >
>  > _______________________________________________
>  >
>  > Sean,
>  >   Broadband connections are almost always asynchronous, which means your download speed is considerably higher than upload speed.  With some or our remote workers they were getting 1.5 Mbps download but only 125 Kbps upload speed!  We ended up having to upgrade their connection to a "business class" connection, but upload speed was still only ½ of the download speed.  You can check your speed both directions with a speed test from a site such as:  http://www.speakeasy.net/speedtest/
>  >
>  > HTH
>  >
>
>  I have a dsl 3m/512k line. speedtest shows 2500/400. I'm not uploading
>  anything. I don't use my home machine as an open server. So 400k should
>  be plenty for one voip connection and the miscellaneous chirps.
>
>  sean
>

Try SIP and see if your problem goes away.  My guess is it will.

Thanks,
Steve Totaro