With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dialCtlPeerStatsRefuseCalls
dial Ctl Peer Stats Refuse Calls
1.3.6.1.2.1.10.21.1.2.2.1.6
Number of calls from this peer refused since system startup.
Back to DIAL-CONTROL-MIB MIB page.
IPHost Network monitor allows you to monitor dialCtlPeerStatsRefuseCalls 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.