IBM 37xx
IBM 37xx (or 37x5) is a family of IBM Systems Network Architecture (SNA) programmable communications controllers used mainly in mainframe environments.
IBM 3725 controller | |
| Manufacturer | IBM |
|---|---|
| Release date | 1972 |
| Discontinued | 2002 |
| Predecessor | IBM 270x series |
| Successor | Communications Controller for Linux software |
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.
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