GB1577461A - Telephone exchange apparatus - Google Patents

Telephone exchange apparatus Download PDF

Info

Publication number
GB1577461A
GB1577461A GB16922/77A GB1692277A GB1577461A GB 1577461 A GB1577461 A GB 1577461A GB 16922/77 A GB16922/77 A GB 16922/77A GB 1692277 A GB1692277 A GB 1692277A GB 1577461 A GB1577461 A GB 1577461A
Authority
GB
United Kingdom
Prior art keywords
line status
key
signal
line
attendant
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.)
Expired
Application number
GB16922/77A
Other languages
English (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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Publication of GB1577461A publication Critical patent/GB1577461A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/62—Keyboard equipment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
GB16922/77A 1976-04-24 1977-04-22 Telephone exchange apparatus Expired GB1577461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4690076A JPS52130210A (en) 1976-04-24 1976-04-24 Subscriber condition display control system

Publications (1)

Publication Number Publication Date
GB1577461A true GB1577461A (en) 1980-10-22

Family

ID=12760230

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16922/77A Expired GB1577461A (en) 1976-04-24 1977-04-22 Telephone exchange apparatus

Country Status (7)

Country Link
US (1) US4103113A (https=)
JP (1) JPS52130210A (https=)
CA (1) CA1076725A (https=)
DE (1) DE2717748C2 (https=)
FR (1) FR2349247A1 (https=)
GB (1) GB1577461A (https=)
IT (1) IT1075640B (https=)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402853A3 (en) * 1989-06-13 1991-11-27 Fujitsu Limited Private branch exchange system with attendant console
GB2349039A (en) * 1997-10-15 2000-10-18 Hitachi Telecomm Tech A busy line display

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1091354B (it) * 1977-10-21 1985-07-06 Cselt Centro Studi Lab Telecom Identificatore per tavoli di commutazione manuale con servizio di conferenza
DE2751712C3 (de) * 1977-11-19 1981-12-17 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für eine zentralgesteuerte Fernmelde-, insbesondere Fernsprechnebenstellenanlage zur Verarbeitung von Informationen für die Anzeigelemente eines oder mehrerer Abfrageplätze
US4153818A (en) * 1978-06-23 1979-05-08 Nasa Telephone multiline signaling using common signal pair
CA1134050A (en) * 1978-10-11 1982-10-19 Charles A. Ii Lawson Digital display exerciser
DE2846572A1 (de) * 1978-10-26 1980-04-30 Standard Elektrik Lorenz Ag Anzeigensteuerung fuer vermittlungstische
JPS5932241A (ja) * 1982-08-16 1984-02-21 Meisei Electric Co Ltd 出退表示付電話装置
DE4021333C1 (https=) * 1990-07-04 1991-11-07 Telenorma Gmbh, 6000 Frankfurt, De

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1249356B (de) * 1967-09-07 Siemens Aktiengesellschaft, Berlin und München, München Schaltungsanordnung zur Anzeige des Belegtzustandes von Anschlußleitungen für Fernsprechanlagen, insbesondere Nebenstellenanlagen mit Vermittlungsplätzen
US3101393A (en) * 1961-05-17 1963-08-20 American Telephone & Telegraph Cordless type switchboard
US3322907A (en) * 1964-04-01 1967-05-30 Bell Telephone Labor Inc Visual signaling apparatus for electronic switching system
US3671942A (en) * 1970-06-05 1972-06-20 Bell Telephone Labor Inc A calculator for a multiprocessor system
DE2035230C3 (de) * 1970-07-16 1976-01-02 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung für Fernmelde-, insbesondere Fernsprechanlagen zur Anzeige von Betriebsdaten mittels matrixförmig angeordneter Anzeigeeinrichtung
FR2116881A5 (fr) * 1970-12-10 1972-07-21 Cit Alcatel Installation de tables d'operatrices en liaison avec un central de telecommunications
DE2126411C3 (de) * 1971-05-27 1979-11-22 Siemens Ag, 1000 Berlin Und 8000 Muenchen Schaltungsanordnung für Fernmelde-Vermittlungsanlagen mit zentraler Steuerung zur Anzeige von Verbindungsdaten an einem Vermittlungsplatz
US3928732A (en) * 1973-11-19 1975-12-23 Telephone Associates Inc Extension and line indicating display system for key telephone system
US3940567A (en) * 1973-12-05 1976-02-24 Nissan Motor Co., Ltd. Multiplex transmission system on-off signal
DE2408230A1 (de) * 1974-02-21 1975-09-04 Merk Gmbh Telefonbau Fried Schaltungsanordnung zur anzeige des besetztzustandes der anschlussleitungen am vermittlungsplatz einer fernmelde-, insbesondere fernsprechnebenstellenanlage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0402853A3 (en) * 1989-06-13 1991-11-27 Fujitsu Limited Private branch exchange system with attendant console
US5579313A (en) * 1989-06-13 1996-11-26 Fujitsu Limited Method of multiplexing speech signal and control signal in ISDN B-channels for an exchange system
GB2349039A (en) * 1997-10-15 2000-10-18 Hitachi Telecomm Tech A busy line display
US6535595B1 (en) 1997-10-15 2003-03-18 Hitachi Communications Technologies, Ltd. Busy line display method
GB2349039B (en) * 1997-10-15 2003-12-03 Hitachi Telecomm Tech Busy line display terminal device and method

Also Published As

Publication number Publication date
IT1075640B (it) 1985-04-22
JPS5730345B2 (https=) 1982-06-28
US4103113A (en) 1978-07-25
CA1076725A (en) 1980-04-29
FR2349247B1 (https=) 1981-12-31
DE2717748C2 (de) 1987-02-12
DE2717748A1 (de) 1977-10-27
FR2349247A1 (fr) 1977-11-18
JPS52130210A (en) 1977-11-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940422