With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ons15501PowerSupply2Status
ons15501 Power Supply2 Status
1.3.6.1.4.1.1869.11.11.2.18
Gives the status of power supply two.
Back to ONS15501-MIB MIB page.
IPHost Network monitor allows you to monitor ons15501PowerSupply2Status on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.