With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
sharedMemRmIfOutputQCellCount
shared Memory Rm If Output Q Cell Count
1.3.6.1.4.1.9.10.10.1.6.1.1.6
Count of the number of cells in the output queue.
Back to CISCO-ATM-RM-MIB MIB page.
IPHost Network monitor allows you to monitor sharedMemRmIfOutputQCellCount 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.