With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ifJackTable
if Jack Table
1.3.6.1.2.1.26.2.2
to MAUs attached to an interface.
Back to MAU-MIB MIB page.
IPHost Network monitor allows you to monitor ifJackTable on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.