With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
frxNetCRCEs
Cisco 90i Net CRC Errored Seconds
1.3.6.1.4.1.1570.1.4.1.1.11
Network Errored Seconds caused by CRC errors. Total number of seconds in which a frame with a CRC error is received by this channel unit on the network (T1) interface. Only frames whose DLCI is addressed to a port on this channel unit are counted.
Back to CISCO-90-MIB MIB page.
IPHost Network monitor allows you to monitor frxNetCRCEs 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.