So the title is a bit misleading but I figured it’s what most people will search if they want to get active call stats from their Cisco Unified Communications infrastructure – it’s certainly what I searched when I wanted to achieve the same thing. Turns out you can only get active call stats via SNMP from the Cisco Unified Border Element (CUBE).
I will show you how you can get the active incoming/outgoing and total external calls and how you can use these in PRTG to get a nice graph going of Active Calls Vs Bandwidth.
What you won’t see is the number of internal calls as we are only monitoring the CUBE. Internal calls don’t touch the CUBE and as far as my research went, the CUCM server doesn’t keep track of active calls… at least not without some manipulation of OIDs.