This value specifies link length that is supported by the
transceiver while operating in compliance with applicable
standards using 50 micron multimode OM3 [2000 MHz*km] fiber.
The value is in units of 10 meters. A value of 255 means that
the transceiver supports a link length greater than 2.54 km.
A value of zero means that the transceiver does not support
50 micron multimode fiber or that the length information must
be determined from the transceiver technology.