With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
coiFECIntervalUncorWords
Cisco Optical Channel FEC Interval Uncor Words
1.3.6.1.4.1.9.9.639.1.3.3.1.7
The counter associated with the number of Uncorrectable Words encountered on this interface in the interval identified by coiFECIntervalType and coiFECIntervalNum.
Back to CISCO-OTN-IF-MIB MIB page.
IPHost Network monitor allows you to monitor coiFECIntervalUncorWords 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.