With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
vismActiveHighWaterMark
vism Active High Water Mark
1.3.6.1.4.1.351.110.3.24.5
This is the high water mark number of ds0s that were active simultaneously on the card.
Back to CISCO-VISM-DSX0-MIB MIB page.
IPHost Network monitor allows you to monitor vismActiveHighWaterMark 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.