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

[John Beaman]

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