Re: [hylafax-users] race condition

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

Chris Weiss wrote:
> On Thu, Feb 14, 2008 at 11:29 AM, Lee Howard <faxguy@xxxxxxxxxxxxxxxx> wrote:
>   
> >  However, you may be able to work-around the issue by configuring
> >  Asterisk or the Diva server to allocate channels and/or modems in a
> >  "round-robin" fashion rather than always landing on the same
> >  channels/modems.
> >     
>
> most defaults are to answer starting with the first free channel and
> do dial out starting with the last free channel.  main reason for this
> is the prevent picking up the phone to dial and accidentally answering
> a call, on a PRI you'd have to have 22 busy lines before that becomes
> possible where as a round-robin it's possible every time.  seems a
> pause is the best option, unless the PRI is only used for answering
> and not dialing

I'm certainly not a guru on this, but it has been my understanding that 
the PRI D-channel design entirely makes it impossible to "pick up" a 
channel for an outbound call that has an incoming call on it.  Now, if 
you're dealing with E&M wink or robbed-bit or something other than PRI 
... then I can see this "glare" condition as being entirely possible.

Maybe I'm wrong, though.

Thanks,

Lee.


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