With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ons15501ActiveAlarmGroup
ons15501 Active Alarm Group
1.3.6.1.4.1.1869.11.11.6.2.3
The alarm attribute group provides the list of active alarms
Back to ONS15501-MIB MIB page.
IPHost Network monitor allows you to monitor ons15501ActiveAlarmGroup on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.