PL70T four-way linking cable

This four-way linking cable joins four connectors of differing types. End 'A' is a 9-pin D-type plug, end 'B' is a 9-pin D-type socket, end 'C' is a 15-pin high-density D-type socket and end 'D' is a 15-pin high-density D-type plug. It is used to combine a multiwire system with a standard probe system (using PICS) without the need for an IS 1-2 interface selector to route signals.