With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ons15501ActAlarmDateAndTime
ons15501 Act Alarm Date And Time
1.3.6.1.4.1.1869.11.11.3.3.1.3
The local date and time since when the alarm is active
Back to ONS15501-MIB MIB page.
IPHost Network monitor allows you to monitor ons15501ActAlarmDateAndTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.