Telephone exchange for wire telephone and radio telephone

• US 5,757,902 A
• Filed: 12/18/1995
• Issued: 05/26/1998
• Est. Priority Date: 01/27/1995
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Mitsuo, Sadaka
• Primary Examiner(s): Hong, Harry S.
• Application Number:
  US08/574,339
• Time in Patent Office: 890 Days
• Field of Search: 379/58, 379/61, 379/210, 379/211, 379/212, 455/74.1, 455/414, 455/417, 455/462, 455/567, 455/555
• US Class Current: 379/212.01
• CPC Class Codes: H04M 1/725 Cordless telephones user interfaces specially adapted therefor H04M1/724
• CPC Class Codes: H04M 3/42314 in private branch exchanges
• CPC Class Codes: H04Q 3/0045 involving hybrid, i.e. a mixture of public and private, or multi-vendor systems

Abstract

This invention is to provide a telephone exchange capable of operating any one of the juxtaposed and registered extension radiotelephones and wire telephones by only specifying one extension dial number. For this purpose, a wire port physical number is registered in association with a radio port physical number so that two normally separate extension wire telephone (006a, 006b, . . . ) and radiotelephone (008a, 008b, . . . ) can be handled as if they were a single-channel extension phone with a branch switch. Thus, when the user handles two separate radio telephone and wire telephone, the call to the wire telephone can be transferred to the radiotelephone by a simple operation. When the user leaves his desk on which the wire telephone is installed, carrying the radiotelephone with him, it can be carried to a long distance. In addition, two telephones can be used as if they are connected in parallel, and for example, the telephone conversation between a main line and the radiotelephone can be transferred to the wire telephone.

Claims

1. A telephone exchange comprising:

a wire extension interface having a plurality of first extension ports for wire telephones;

a radio extension interface having a plurality of second extension ports for radiotelephones;

a main line interface for connecting main lines;

channel means for connecting or releasing channels between extensions or between extensions and main lines;

extension ports status storage means having a first table for storing dial numbers in association with physical numbers of said first extension ports and said second extension ports and a second table for juxtaposing and registering the physical numbers of said first extension ports in association with the physical numbers of said second extension ports; and

control means for performing a control operation in which (a) a talking channel is connected when one of said first extension ports or one of said second extension ports that is juxtaposed and registered in said extension ports status storage means in association with said one of said first extension ports is put in an off-hook state and said talking channel can be maintained even if another one of said first extension ports or of said second extension ports is put in the off-hook state, and (b) when said one of said first extension ports or said one of said second extension ports is put in an on-hook state, said talking channel is transferred to said another one of said first extension ports or of said second extension ports which has been put in the off-hook state, without supplying the one of said dial numbers which is associated with said another one of said first extension ports or said second extension ports.