asterisk users - Mar 2005 - How to use multiple VOIP provider trunks

I have been able to setup three different providers successfully, but only
one at a time. I would like to have all active in a fail over configuration
so that one failing would not be noticed by the users. I know it's probably
easy to configure but I have not been able to find out how. Can anyone give
me an example?

Chris Mason

Yeah something like that ;-)

Thanks,
Tim

Damon Estep wrote:
><snip>
>
>  
>
>>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.
>>    
>>
>
>How about the simple and traditional method,
>
>Dial 9 for an outside line, dial 8 for an alternate outside line? Or
>dial nothing for an outside line, dial 9 for an alternative outside
>line.
>
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> I have been able to setup three different providers successfully, but only
> one at a time. I would like to have all active in a fail over configuration
> so that one failing would not be noticed by the users. I know it's
probably
> easy to configure but I have not been able to find out how. Can anyone give
> me an example?
It won't be anywhere near as easy as what you might think.

Failures might include:
 - call processed but provider has a problem (incomplete call)
 - register is working, call processing is not
 - provider is off-line (for whatever reason; seldom happens)
 - your local isp is down (or having a problem; all itsp's fail)

Asterisk won't know the status of some of these.

> 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...

<snip>
> 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.
How about the simple and traditional method,

Dial 9 for an outside line, dial 8 for an alternate outside line? Or
dial nothing for an outside line, dial 9 for an alternative outside
line.

Not sure if you are joking or not (the smiley face confused me), you do
realize this is quite simple, right? 

> 
> Yeah something like that ;-)
> 
> Thanks,
> Tim
> 
> Damon Estep wrote:
> 
> ><snip>
> >
> >  
> >
> >>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.
> >>    
> >>
> >
> >How about the simple and traditional method,
> >
> >Dial 9 for an outside line, dial 8 for an alternate outside line? Or
> >dial nothing for an outside line, dial 9 for an alternative outside
> >line.
> >

"Anyway, thanks for replying, and hope I didn't come off as an
ass."

You didn't. just was not sure if you knew how to pick different trunk
groups in your dial plan.
> -----Original Message-----
> From: asterisk-users-bounces@lists.digium.com 
> [mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of 
> Tim Pushor
> Sent: Sunday, March 27, 2005 1:07 PM
> To: Asterisk Users Mailing List - Non-Commercial Discussion
> Subject: Re: [Asterisk-Users] How to use multiple VOIP provider trunks
> 
> Damon,
> 
> Yes, sorry. It is very easy, I agree. I was just referring to 
> the fact that I would do *something* like that.
> 
> I am not crazy about painting myself into a corner (by 
> assuming that there is only 2 or 3 possible routes), so I 
> would probably prefer to do something like (off the top of my head)
> 
> *11 - next call uses primary route only (no failover)
> *12 - next call uses secondary route only and so on
> 
> Anyway, thanks for replying, and hope I didn't come off as an ass.
> 
> Tim
> 
> Damon Estep wrote:
> 
> >Not sure if you are joking or not (the smiley face confused 
> me), you do 
> >realize this is quite simple, right?
> >
> >
> >  
> >
> >>Yeah something like that ;-)
> >>
> >>Thanks,
> >>Tim
> >>
> >>    
> >>
> 
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