How to test if a phone line is up or down

[cynjut (Dave Burgess)]

@elau1

We have Twillio in which we can use to make the calls, but we want to avoid the costs that would be associated with it

The call wouldn’t ever have to ‘complete’ to do what you’re trying to do. The fact that the call rang from the DID/CID combo and was immediately rejected should be enough to satisfy the check.

On the Inbound Route, set the destination to “Terminate - SIT Tones” and the call will never complete (according to Twilio). Also, unless Twilio is actually charging for every second, the entire check would take less than a second, and most providers bill in 6-second increments.