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Tektronix 021-0033-00
Data Communications Interface Unit
Tektronix 021-0033-00

Produced from (?) to (?)

(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 021-0033-00 Data Communications Interface Unit allows a Tektronix Graphic Computer Terminal (e.g., 4002A) to be connected to a remote computer via a modem.

It is what we today call a serial port card, i.e, a UART plus the circuitry to interface with the computer's bus.