Unfortunately, most North American providers ignore (and in most cases 
reclassify) it before it reaches their border routers and it will be treated as 
best effort. Typically, the problems are introduced within the first mile and 
its simply a matter of getting the packet safely pass the edge unless your ISP 
is grossly oversubscribed (in terms of servicable traffic limited by their 
particular hardware and bandwidth).

If it is too costly to move to "second line" or "dedicated" DSL, he should be 
able to improve audio quality by acquiring a broadband router that has minimal 
QoS capabilities and adequate CPU (since the majority of them use software 
based queuing and packet fragmentation).  The only caveat is that the degree of 
success can vary between firmware versions.  Some of the consumer (gaming) or 
small business (VPN) grade routers work well (Linksys, DLINK, etc.).

-metik  


  From: Tihomir Culjaga 
  To: [email protected] 
  Sent: Monday, October 26, 2009 5:34 PM
  Subject: Re: [Freeswitch-users] Setup advice on small LAN




      If one of the computers does a big download, it messes with FS in two 
ways. If a connection is made, the voices are broken up, intermittent and 
difficult to understand. If the download is long enough, the connection to 
Flowroute is no longer usable due to registration failure.



  In any case, regardless if you are using a dedicated or mixed dsl line you 
should flag your voice traffic properly.

  signaling AF41, RTP EF... your voice traffic must never be flagged as pure 
date when sending it through open internet!



  T.



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