With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
frxChUVersion
Cisco 90i Current Hour U Version
1.3.6.1.4.1.1570.1.4.1.1.3
Cisco 90 Series channel unit version number.
Back to CISCO-90-MIB MIB page.
IPHost Network monitor allows you to monitor frxChUVersion on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.