With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ons15501InputOpticalPowerMean
ons15501 Input Optical Power Mean
1.3.6.1.4.1.1869.11.11.2.2
Mean value for input optical power. If the input optical power falls below the mean value by more than trigger (see ons15501InputOpticalPowerTrigger) an alarm is generated. The alarm is cleared when the input optical power is back within 90% of trigger from the mean.
Back to ONS15501-MIB MIB page.
IPHost Network monitor allows you to monitor ons15501InputOpticalPowerMean 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.