With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cwTrapLineModuleNumber
cw Trap Line Module Number
1.3.6.1.4.1.351.150.5.1.1.4
This object contains the value for entPhysicalParentRelPos object for line modules.
Back to CISCO-WAN-TRAP-VARS-MIB MIB page.
IPHost Network monitor allows you to monitor cwTrapLineModuleNumber 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.