With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
prtInputSerialNumber
Printer Input Serial Number
1.3.6.1.4.1.11.2.3.9.4.2.2.8.2.1.17
The serial number assigned to this input sub-unit.
Back to Printer-MIB MIB page.
IPHost Network monitor allows you to monitor prtInputSerialNumber 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.