IBM 270x
| Type | Communication controllers |
|---|---|
| Release date | 1967 |
| Successor | IBM 37xx series |
270x is a generic name for a family of IBM non-programmable communications controllers used with System/360 and System/370 computers.
The family consisted of the following devices:
- IBM 2701 Data Adapter Unit
- IBM 2702 Transmission Control
- IBM 2703 Transmission Control
The 2701 and 2702 were announced simultaneously with System/360 in 1964, the 2703 was announced a year later.: p.181
The 270x series was superseded by the IBM 3704 and 3705 communications controllers in 1972.