[asterisk-users] PSTN failover

[Philipp Kempgen]

I don't really understand how ChanIsAvail() can be of any use.
Even if it tells you that the channel is available there's no
guarantee that the call will go through.
And moreover between the ChanIsAvail() check and the Dial()
command someone else could have taken the channel.

Regards,
  Philipp Kempgen

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