[asterisk-users] IAX over two T1 connections bad quality

[Bart Fisher]

Replace IAX with SIP - It solved my problems with several providers 
including FWD and Teliax

Bart

Jerry Geis wrote:
> Help please. I have two systems on the net.
> one in indiana and one in georgia.
> connected with IAX. local SIP phones in each office (10 each) are 
> cisco and running sip.
> TDM04B card in each location has 4 local lines.
> Incoming calls to each location sound fine always.
> The problem is dialing between offices the call quality is BAD.
>
> Both offices are connected to the net with T1 lines. all data.
>
> All phones are setup ulaw 64bit. The IAX connection between the boxes 
> is ulaw 64 bit.
>
> I tried skype between the two offices and talked for 15 minutes and 
> had no issue.
>
> The machine CPU usage is running 92-97% idle most of the time.
>
> Running asterisk 1.2.9.1 and zaptel 1.2.6.
>
> There are switches in the mix that have voice traffic having priority.
>
> How do I determine what is the issue here? Why is the call quality bad 
> and where is
> it that I can tweek.
>
> Jerry
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