Enable SNMP on your Cisco Routers to watch SIP and other traffic
It’s pretty easy, just ssh (or telnet if you’re crazy) to your router and do this: # en # conf t # snmp-server community YOUR.SNMP.COMMUNITY ro # access-list 60 permit IP.OF.SNMP.DAEMON # snmp-server host IP.OF.SNMP.DAEMON YOUR.SNMP.COMMUNITY # snmp-server enable traps Now your favourite graphing software should be able to collect all the data you need.