From Observium

ENTITY-MIB::entPhysicalDescr.1 = STRING: 1841 chassis, Hw Serial#: 5555, Hw Revision: 5.0
ENTITY-MIB::entPhysicalVendorType.1 = OID: CISCO-SMI::ciscoModules.3.1.3.450
ENTITY-MIB::entPhysicalContainedIn.1 = INTEGER: 0
ENTITY-MIB::entPhysicalClass.1 = INTEGER: chassis(3)
ENTITY-MIB::entPhysicalParentRelPos.1 = INTEGER: -1
ENTITY-MIB::entPhysicalName.1 = STRING: 1841 chassis
ENTITY-MIB::entPhysicalHardwareRev.1 = STRING: V01
ENTITY-MIB::entPhysicalFirmwareRev.1 = STRING:
ENTITY-MIB::entPhysicalSoftwareRev.1 = STRING:
ENTITY-MIB::entPhysicalSerialNum.1 = STRING: FCZ5555555
ENTITY-MIB::entPhysicalMfgName.1 = STRING: Cisco
ENTITY-MIB::entPhysicalModelName.1 = STRING: CISCO1841
ENTITY-MIB::entPhysicalAlias.1 = STRING:
ENTITY-MIB::entPhysicalAssetID.1 = STRING:
ENTITY-MIB::entPhysicalIsFRU.1 = INTEGER: false(2)

ENTITY-MIB::entPhysicalDescr.7 = STRING: Gt96k FE
ENTITY-MIB::entPhysicalVendorType.7 = OID: CISCO-SMI::ciscoModules.3.1.10.16
ENTITY-MIB::entPhysicalContainedIn.7 = INTEGER: 3
ENTITY-MIB::entPhysicalClass.7 = INTEGER: port(10)
ENTITY-MIB::entPhysicalParentRelPos.7 = INTEGER: 0
ENTITY-MIB::entPhysicalName.7 = STRING: FastEthernet0/0
ENTITY-MIB::entPhysicalHardwareRev.7 = STRING:
ENTITY-MIB::entPhysicalFirmwareRev.7 = STRING:
ENTITY-MIB::entPhysicalSoftwareRev.7 = STRING:
ENTITY-MIB::entPhysicalSerialNum.7 = STRING:
ENTITY-MIB::entPhysicalMfgName.7 = STRING: Cisco
ENTITY-MIB::entPhysicalModelName.7 = STRING:
ENTITY-MIB::entPhysicalAlias.7 = STRING:
ENTITY-MIB::entPhysicalAssetID.7 = STRING: 
ENTITY-MIB::entPhysicalIsFRU.7 = INTEGER: false(2)