With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
caonNodeState
Cisco AON Node State
1.3.6.1.4.1.9.9.646.1.1.1
This object indicates the node state. 'unregistered': Node is not yet registered with AMC. 'registered' : Node has registered with AMC but is not yet activated. 'active' : Node has been activated from AMC and is ready to process messages. 'inactive' : Node has been activated from AMC but AON process is down.
Back to CISCO-AON-STATUS-MIB MIB page.
IPHost Network monitor allows you to monitor caonNodeState on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.