Importance

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Abstract

There is provided a data communicating apparatus which can be connected to different communication networks such as a digital network and an analog network, comprising: a digital network communication control unit (digital NCU) to communicate data through a digital communication network; a telephone network communication control unit (TEL NCU) to communicate data through an analog communication network; a selector to select either the digital NCU or the TEL NCU in accordance with the called number of a destination; a circuit to perform an originating call to the communication network selected by the selector; and a switching circuit for discriminating a response signal from the communication network for the originating call by the originating calling circuit and for switching the communication control unit which is selected by the selector when the response signal is a special code. With the apparatus, a line to be used is automatically selected on the basis of the result of the response signal from the network for the originating call.

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First Claim