Call Progress Monitoring (CPM)

 

Call Progress Monitoring (CPM) is the method by which a unit such as the Catalyst RTU can interpret tones on the phone line to determine the progression of a phone call. Dialing and delivering notifications and data logs without regard to CPM is sometimes referred to as blind dialing.

 

In the Catalyst, RTU Call Progress Monitoring (CPM) is used to make decisions about whether to commence voice notification reports or whether to consider a call attempt failed, due to no answer or the phone line being busy. The RTU will operate quite differently, depending on whether CPM is ON or OFF.

 

The differences are as follows:

 

CPM ON (default)

 

 

CPM OFF (Blind Dialing)

 

 

Important Note: The RTU will NOT make repeated attempts to the same number. The Redial Attempts feature is effectively disabled when CPM if OFF.