The Germanium Compressor Link Cable from Chandler allows usage of the link function on the company's Germanium Compressor to link two or more compressors together, up to 5.1 surround configurations.
Some compressor controls link the control voltage, but some do not use the control voltage to function. Input, attack, release follow the link, but all remaining functions must be set by hand. Since those are mostly switches, it is easy to reproduce the sound from unit to unit.