Teletype Incoming Line Unite 4702C system building block
Digital Equipment Corporation (DEC)
Printed on the solder side
Stamped into the front of the aluminum frame and hand written on the side
Stamped into the side of the aluminum frame
overall: 1/2 in x 4 1/2 in x 14 in
The module consists of a printed circuit board with various components, surrounded by an aluminum frame and Blue plasic 22 pin connector. At the end of the board opposite the connector there is a single toggle switch. "D.S. 4702" is handwritten in pen on one side of the frame.