Gray Anthony

I want to make a custom board that will mate to the 78-pin D-sub on the 3723 matrix switch.  What is the part number and manufacturer of the 78-pin D-sub used on the 3723?  Ideally I would like to have the part number for a mating board-mount connector, but if someone can at least provide the pat number of the connector on the unit, I can use that to find what I need.