Maximum engineering data rate
Maximum engineering data rate (MEDR) is a term primarily used by telephone companies to refer to the maximum data throughput supportable over targeted copper wire.
MEDR is actually a theoretical measure of the amount of data throughput a line can handle, but does not necessarily refer to the amount of data available to the customer at the end of said copper wiring. The data throughput that can actually be presented to the end user is measured by AIDR or As Is Data Rate.