With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
frxT1InOctets
Cisco 90i T1 In Octets
1.3.6.1.4.1.1570.1.6.1.1.9
Number of octets received from the network directed at this subscriber port
Back to CISCO-90-MIB MIB page.
IPHost Network monitor allows you to monitor frxT1InOctets on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.