Description: The current state of the sfp transceiver unknown -- Unknown notInstalled -- the SFP transceiver is not installed installed -- the sfp transceiver has been installed faulty -- the sfp transceiver is faulty operational -- the sfp transceiver is working properly enabled -- the sfp transceiver has been enabled disabled -- the sfp transceiver has been diabled, invalidCCBase -- indicates that the first 64 bytes of serial information in the SFP transceiver is invalid. The check is done by comparing the 64-th byte with the sum of the contents of the first 63 bytes (bytes 0 to 62, inclusive). invalidCCExt -- indicates that the first 32 bytes of the extended serial information in the SFP tranceiver is invalid. The check is done by comparing theu 95-th byte with the sum of the contents of the first 32 bytes (bytes 64 to 94, inclusive).