FR2341997A1 - Automatic intercity telephone system - incorporates special land lines and uses miniature switching relays - Google Patents

Automatic intercity telephone system - incorporates special land lines and uses miniature switching relays

Info

Publication number
FR2341997A1
FR2341997A1 FR7604749A FR7604749A FR2341997A1 FR 2341997 A1 FR2341997 A1 FR 2341997A1 FR 7604749 A FR7604749 A FR 7604749A FR 7604749 A FR7604749 A FR 7604749A FR 2341997 A1 FR2341997 A1 FR 2341997A1
Authority
FR
France
Prior art keywords
relay
land lines
automatic
telephone system
circuit
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.)
Withdrawn
Application number
FR7604749A
Other languages
French (fr)
Inventor
Michel Leclerq
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7604749A priority Critical patent/FR2341997A1/en
Publication of FR2341997A1 publication Critical patent/FR2341997A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Train Traffic Observation, Control, And Security (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)

Abstract

A telephone system such as an automatic inter-city system transmitting over land lines, has an impulse train relay, a deception relay for signals over land lines originating from remote locations and an occupation relay suppressing the readiness condition of the system. The system incorporates a receiver and transmitter employing special land lines, circuits of maintenance and local excitation of the reception relay and a supervision circuit. A complementary circuit is coupled to the system inputs and connection terminals enable the telephone circuit to interpret in an annalogons manner those signals received by archinery land line or the special land line.
FR7604749A 1976-02-20 1976-02-20 Automatic intercity telephone system - incorporates special land lines and uses miniature switching relays Withdrawn FR2341997A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7604749A FR2341997A1 (en) 1976-02-20 1976-02-20 Automatic intercity telephone system - incorporates special land lines and uses miniature switching relays

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7604749A FR2341997A1 (en) 1976-02-20 1976-02-20 Automatic intercity telephone system - incorporates special land lines and uses miniature switching relays

Publications (1)

Publication Number Publication Date
FR2341997A1 true FR2341997A1 (en) 1977-09-16

Family

ID=9169399

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7604749A Withdrawn FR2341997A1 (en) 1976-02-20 1976-02-20 Automatic intercity telephone system - incorporates special land lines and uses miniature switching relays

Country Status (1)

Country Link
FR (1) FR2341997A1 (en)

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Legal Events

Date Code Title Description
ST Notification of lapse