snChasExpBrdId 1.3.6.1.4.1.11.2.3.7.11.12.1.1.1.14

The expansion board identifier. Expansion board are those boards attaching on the main board. It is an encoded octet string with the following meaning: octet 0 - octet string format version, which identifies the format of this string. If format version octet has the value 1, the octets after the version octet have the following meaning: octet 1 - expansion board type, HUNDRED_MEG_1PORT=1, HUNDRED_MEG_2PORT=2, HUNDRED_MEG_1PORT_COPPER=3, HUNDRED_MEG_2PORT_COPPER=4, HUNDRED_MEG_2PORT_LX=5, GIGA_1PORT=8, GIGA_2PORT=9 octet 2 - fiber port type, NONFIBER=0, SX_FIBER=1, LX_FIBER=2, LHX_FIBER=3, LX_SX_FIBER=4 (It is obsoleted for Chassis Product)