[Asterisk-Users] How to use multiple VOIP provider trunks

[Tim Pushor]

my ITSP is great. I will not drop them at the first sign of issues. IMO 
if you are looking for 100% reliability, don't go itsp.

I am in Calgary, Canada and my brother has accounts with 6tel and 
livevoip. The quality of mine has been consistently better than either 
of those (probably mostly because of the proximity of the gateways, and 
g729).

I am not prepared to switch itsp's and all the hassle of switching phone 
numbers (no LNP yet).  becuase I got a busy signal for two hours once. 
(it wasn't oversubscribed pstn lines). I just want to know what others 
are doing.

I am working on a phone routing system (with duplicate/redundant routes) 
and I will just have a way for a user to tell the system that they want 
to use an alternate route for the next call.

Thanks

>>One problem I was having with my itsp is that I was able to 
>>make the SIP connection, but the voice connection failed on 
>>the back end. As far as * was concerned the beep beep beep 
>>was a valid call, and didn't fail over.
>>
>>    
>>
>
>Sounds like the call was completed, but your ITSP had no available PSTN
>ports on thier media gateway. You cant fail over by any means if there
>is no failure.
>
>Does asterisk should the channels bridged? If so the call is complete in
>SIP terms.
>
>To fix this problem you should find a less oversubscribed itsp...
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