This value specifies the minimum link length that is supported
by the transceiver while operating in compliance with the
applicable standards using copper cable. The value is in units
of 1 meter. A value of 255 means that the transceiver supports
a link length greater than 254 meters. A value of zero means
that the transceiver does not support copper cables or that
the length information must be determined from the transceiver
technology. Further information about the cable design,
equalization, and connectors is usually required to guarantee
meeting a particular length requirement.