This object indicates the extended identifier of type of serial transceiver.
Options:
1. notSpecifiedOrNotCompliant(1) - Not specified or not compliant with a defined MOD_DEF
2. moddef1(2) - GBIC is compliant with MOD_DEF 1
3. moddef2(3) - GBIC is compliant with MOD_DEF 2
4. moddef3(4) - GBIC is compliant with MOD_DEF 3
5. byTwowireOnly(5) - GBIC/SFP function is defined by two-wire interface ID only
6. moddef5(6) - GBIC is compliant with MOD_DEF 5
7. moddef6(7) - GBIC is compliant with MOD_DEF 6
8. moddef7(8) - GBIC is compliant with MOD_DEF 7
9. invalid(-1) - Indicates that the query fails or no information is detected