IBM 37xx (original) (raw)

IBM 37xx (or 37x5) is a family of IBM Systems Network Architecture (SNA) programmable communications controllers used mainly in mainframe environments. All members of the family ran one of three IBM-supplied programs. * Emulation Program (EP) mimicked the operation of the older IBM 270x non-programmable controllers. * Network Control Program (NCP) supported Systems Network Architecture devices. * Partitioned Emulation Program (PEP) combined the functions of the two.