FR2350745A1 - Automatic switching of two telephone to single line - uses multiple relay circuit which enables internal connection between two telephones while still able to receive incoming calls - Google Patents

Automatic switching of two telephone to single line - uses multiple relay circuit which enables internal connection between two telephones while still able to receive incoming calls

Info

Publication number
FR2350745A1
FR2350745A1 FR7614009A FR7614009A FR2350745A1 FR 2350745 A1 FR2350745 A1 FR 2350745A1 FR 7614009 A FR7614009 A FR 7614009A FR 7614009 A FR7614009 A FR 7614009A FR 2350745 A1 FR2350745 A1 FR 2350745A1
Authority
FR
France
Prior art keywords
telephones
telephone
still
multiple relay
single line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR7614009A
Other languages
French (fr)
Other versions
FR2350745B1 (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to FR7614009A priority Critical patent/FR2350745A1/en
Publication of FR2350745A1 publication Critical patent/FR2350745A1/en
Application granted granted Critical
Publication of FR2350745B1 publication Critical patent/FR2350745B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

A multiple relay switching circuit enables two telephones to the connected automatically to a GPO telephone line or they may be interconnected. This system is useful for small business where a telephone in a flat has an extension to the business. In a business where two telephones are connected to a single GPO line a relay ensures that both telephones are connected to the line. Two other relays ensure that calls are received simultaneously on both telephones. A ringing tone warns users that an external call is present when both telephones are in communication and a musical tone replaces occupied tone when double call is in process.
FR7614009A 1976-05-07 1976-05-07 Automatic switching of two telephone to single line - uses multiple relay circuit which enables internal connection between two telephones while still able to receive incoming calls Granted FR2350745A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7614009A FR2350745A1 (en) 1976-05-07 1976-05-07 Automatic switching of two telephone to single line - uses multiple relay circuit which enables internal connection between two telephones while still able to receive incoming calls

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7614009A FR2350745A1 (en) 1976-05-07 1976-05-07 Automatic switching of two telephone to single line - uses multiple relay circuit which enables internal connection between two telephones while still able to receive incoming calls

Publications (2)

Publication Number Publication Date
FR2350745A1 true FR2350745A1 (en) 1977-12-02
FR2350745B1 FR2350745B1 (en) 1979-03-23

Family

ID=9172933

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7614009A Granted FR2350745A1 (en) 1976-05-07 1976-05-07 Automatic switching of two telephone to single line - uses multiple relay circuit which enables internal connection between two telephones while still able to receive incoming calls

Country Status (1)

Country Link
FR (1) FR2350745A1 (en)

Also Published As

Publication number Publication date
FR2350745B1 (en) 1979-03-23

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Legal Events

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