With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ons15501PowerSupplyStatusGroup
ons15501 Power Supply Status Group
1.3.6.1.4.1.1869.11.11.6.2.8
The ons15501 group of attributes models the status of power supplies. The support for status was introduced in version 4.0.
Back to ONS15501-MIB MIB page.
IPHost Network monitor allows you to monitor ons15501PowerSupplyStatusGroup on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.