Using system debug you can see what is going on internally in the system. You can verify that the system is doing certain functions such as sending out Caller ID over a PRI.
90-31-01-Check to enable DIM Access (Also note the username and password as they will be needed for the debug)
10-20-06 Note the DIM Output Port-(Note-this port may need changed if your system is on the customers network)
Click on Tools(On the top bar) and then click on Debug terminal
Enter IP Address and click on connect to begin streaming system activity
You can then save a copy.
When review you can enter Ctrl-F and this will allow you to do a search of the capture.