Available report variables for each trending source Observer Reporting Server can place hundreds of variables in tables or grids or graphs. The list is extremely expansive and too large to include in this space, but using the links below you can view the variables by trending source. Only the variables available for that trending source are shown. Each column is a sub-source under the trending source in ORS. APA and ATA Internet Patrol IP Pairs MAC Layer Microburst IPFix/NetFlow/sFlow Observer Infrastructure TCP/UDP Applications Trading Multicast VLAN VoIP Wireless