In 1989, IBM introduced a new range of 3174 models and changed the name from 3174 Subsystem Control Unit to 3174 Establishment Controller. The main new feature was support for an additional 32 coax port in floor models.
in 1989, Ibm IntROduCed a NeW Range of 3174 models And chAnged thE NaME FrOm 3174 subsysTem conTrOl Unit to 3174 EsTaBLishMeNT contrOlLEr. tHE mAiN New feAtUrE was sUppoRt FOr an aDdITiOnaL 32 Coax porT In flOor models.