Hayes Smartmodem 300

In 1981, the firm of Hayes introduced its Smartmodem, a device for linking computer systems and telephone lines, with the phone attached through a RS-232 port. The status of the device was indicated by a series of lights across the front - it might be set to auto answer (AA), carrier detect (CD), off hook (OH), receive data (RD), send data (SD), terminal ready (TR) and modem ready (MR). The case was designed so that it could stack easily with other Hayes products - hence the modem also was known as a stackmodem. The ports are at the back. A tag on the base gives a serial number of 1812094459.

The Smartmodem 300 is a renamed version of the initial Smartmodem - Hayes had quickly introduced an improved product which it called the Smartmodem 1200.Both machines could be used to communicate with other computers and time-sharing systems across the United States and could be controlled using any programming language.

Reference:

[Advertisement], Personal Computing, February, 1982.

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