Abstract: A communication apparatus comprises a communicating circuit, a connecting unit for connecting a telephone or the communicating circuit to a line, a disconnecting unit for disconnecting the telephone from the line, a call reception detection circuit, a detection circuit for detecting a hook state of the telephone, an output unit for outputting a signal indicating that the call generation limitation mode has been set, a display for displaying that the apparatus is in the call generation limitation mode, and a dial signal transmission unit. A call generation of an attached telephone can be limited with a simple construction and a call generation limiting function of the data communication apparatus can be certainly realized.

Abstract: There is disclosed a communication apparatus to which connected are plural telephone units and data communication units, such as facsimile units, wherein the data communication units can be controlled by instructions from the telephone units.

Abstract: A communication system of this invention is constituted by a controller which accommodates a plurality of extensions connected to an office line and telephones, and includes a facsimile unit for performing facsimile communication with another communication apparatus through the office line, and a plurality of telephones connected to the extensions. The controller can inform an operation state during facsimile communication to the connecting telephone. The operation state of the facsimile unit can be recognized at the telephone. Information received by the facsimile unit can be confirmed at the telephone, and some data received by the facsimile unit can be controlled by the telephone. A registration result of an index number can be commonly used by the telephone and the facsimile unit.

Abstract: A data transmission apparatus includes a facsimile section for performing data transmission, at least one multifunction telephone set terminal for performing speech communication, a switching circuit for switching the facsimile section and the multifunction telephone set terminal, and a microcomputer for detecting whether transmission data is set in the facsimile section. The switching circuit switches a transmission line from the multifunction telephone set terminal to the facsimile section when the microcomputer detects that the transmission data is stored in the facsimile section while the multifunction telephone set terminal is engaged with the transmission line.

Abstract: A communication system comprises a plurality of speech communication terminals each having apparatus for inputting data representing a station. A call is issued in accordance with the data from the communication terminal, and the system receives call data representing a station which responds to the call. The data received by the system is compared with the data input from the speech communication terminal and display units of the speech communication units are controlled in accordance with the comparison result.

Abstract: A communication apparatus includes a facsimile system for performing data communication, a plurality of telephone sets for performing speech communication; and a control unit for controlling the facsimile system. Each telephone set includes a display unit for displaying a state of data communication. The control unit selectively sends information associated with the state of the facsimile system to the telephone sets to cause the display units to display the state of the facsimile system.

Abstract: An image communication apparatus includes a plurality of speech or nonspeech communication terminals and a line controller for connecting the plurality of terminals to a communication line. Each of the terminals includes an image reader circuit for reading an original image, and the line controller includes a transmitter for transmitting image data by the image reader circuit to the communication line.

Abstract: A data communication apparatus having a data transmitting portion, a data receiving portion, a detachable memory device such as an IC card or optical card in which received items of data are memorized, and a controller for controlling the process of transmitting and receiving data. In the memory device is set identification codes for identifying the receiver in a confidential communication process. The form of data transmitted by this apparatus is preliminarily converted in accordance with the function of the other party's apparatus.

Abstract: A recording apparatus includes a record head which performs a record operation on a record medium and a drive signal generator that which drives the record head. Continuous generation of the drive signal is limited by a limiter.