With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
rpJackIndex
Repeater Jack Index
1.3.6.1.2.1.26.1.2.1.1
described by this entry from among other jacks attached to the same MAU (rpMauIndex).
Back to MAU-MIB MIB page.
IPHost Network monitor allows you to monitor rpJackIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.