Using the pysnmp framework i get some values doing a snmp walk. Unfortunately for the oid
1.3.6.1.21.69.1.5.8.1.2 (DOCS-CABLE-DEVICE-MIB)
Shameless plug here: The Pycopia SNMP and SMI modules correctly handle this object, and others as well. Pycopia is installed from source, and dont forget the mibs file if you try it.