The modern IBM 374X Communication Controller is of the latest model, includes the highest engineering
level components and code, and is optimized for reliability, serviceability. The modern FEP results in
the lowest available NCP (Network Control Program) tier level for reduced cost.
| 3745-31A | Single CCU FEP |
| 3745-61A | Dual CCU FEP |
| 3746-900 | Expansion Unit |
| 3746-950 | Standalone Expansion Unit for APPN |
| FC 5054 | SP4 – Service Processor Type 4 at latest code |
| FC 5425 | NNP5 – Network Node Processor Type 5 at latest code |
| FC 5523 | ESCP3 – ESCON Processor Type 3 at highest EPROM |
| FC 5623 | TRP3 – Token Ring Processor Type 3 at highest EPROM |
| FC 5203 | CLP3 – Communication Line Processor Type 3 at highest EPROM |
| FC 5123 | CBSP3 at highest EPROM |
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