I'm in need of information on how to configure incoming calls from the PSTN to an FXO port. Should I use the default-destination command, the connection-plar command or the alias command? What does Cisco suggest/recommends?
It depends on where the calls route normally, and where they need to route in SRST mode.
I have set up some with connection plar that ring a receptionist's phone on site. This works fine with SRST as the phone registers with the router and it continues to work.
At most of our sites we use the SRST TCL script that normally sends calls to a Call Manager pilot number, which in our case is a call center pilot. When that number is unreachable (SRST mode) a AA greeting is played that includes the option to dial an extension or 0 for the operator. The operator extension is one of the paramaters you define for the script. If the caller does nothing the call goes to the operator extension.
I have not tried the default destination, but that might be a good choice if you normally use MGCP for the FXOs.
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