System and method to alter the functions assigned to the keys of

Details System and method to alter the functions assigned to the keys of System and method to alter the functions assigned to the keys of

1990-03-15

1992-06-02

Dwyer, James L.

Telephonic communications

Multi-line or key substation system with selective switching...

379157, 379201, H04M 166

Patent

active

051194139

ABSTRACT:
An electronic exchange system comprising a telephone exchange for connecting at least extension lines and office lines, and at least an extension terminal which can be connected to the exchange, which has keys and can function as a communication device is disclosed. The terminal has a first memory device for storing key-assign data consisting of the codes of the keys, a data-receiving device for receiving the key-assign data, a memory control device for writing into the first memory device the key-assign data received from the telephone exchange, and a first control device for retrieving a key code from the first memory device and supplying the key code to the telephone exchange when the key identified by the key code is operated. The telephone exchange comprises a second memory device for storing the key-assign data and the data items representing the functions of the keys, a second control device for reading the key-assign data from the second memory and supplying it to the terminal, upon determining that the terminal is connected to the telephone exchange, and a third control device for performing the functions specified by the key codes transmitted from the terminal and also by the data items stored in the second memory. The function of the keys are assigned can be altered, only by altering the contents of the second memory device.

REFERENCES:
patent: 4595800 (1986-06-01), Nagatomi et al.
patent: 4605825 (1986-08-01), Komuro et al.
patent: 4897866 (1990-01-01), Majmudar et al.

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