Telephone exchange apparatus

Details Telephone exchange apparatus Telephone exchange apparatus

1994-05-23

1995-02-21

Dwyer, James L.

Telephonic communications

Special services

Anonymous party

379356, 379131, H04M 342

Patent

active

053923405

ABSTRACT:
A telephone exchange apparatus for plural extension telephone units is capable of interchanging, in response to a predetermined operation from one of the extension telephone units the extension numbers of two extension telephone units and the associated information stored in advance for these extension telephone units, such as individual one-touch dialling data, abbreviated dialling data and re-dialling data. In response to the predetermined operation, the exchange apparatus interchanges the data areas in a memory respectively corresponding to the physical addresses of the extension telephone units.

REFERENCES:
patent: 4602128 (1986-07-01), Freundlich
patent: 4680785 (1987-07-01), Akiyama et al.
patent: 4833705 (1989-05-01), Kobayashi
patent: 4896346 (1990-01-01), Belfield et al.
patent: 4899373 (1990-02-01), Lee et al.

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