Analysis of information sources in references of the Wikipedia article "List of IBM products" in English language version.
may be attached to an IBM 1016 Control Unit or an IBM 1414 Input/Output Synchonizer
may be attached to an IBM 1016 Control Unit or an IBM 1414 Input/Output Synchonizer
Physical layer switches for computer communication have been used for a long time. For example, the IBM 2914 bus-and-tag crosspoint switch was available in the 1970s.