BE857036A - Circuit de commande de ligne pour poste telephonique a clavier - Google Patents

Circuit de commande de ligne pour poste telephonique a clavier

Info

Publication number
BE857036A
BE857036A BE179543A BE179543A BE857036A BE 857036 A BE857036 A BE 857036A BE 179543 A BE179543 A BE 179543A BE 179543 A BE179543 A BE 179543A BE 857036 A BE857036 A BE 857036A
Authority
BE
Belgium
Prior art keywords
control circuit
line control
telephone station
keypad telephone
keypad
Prior art date
Application number
BE179543A
Other languages
English (en)
Original Assignee
Western Electric Co
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 Western Electric Co filed Critical Western Electric Co
Publication of BE857036A publication Critical patent/BE857036A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/006—Exchange line circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Interface Circuits In Exchanges (AREA)
BE179543A 1976-07-28 1977-07-22 Circuit de commande de ligne pour poste telephonique a clavier BE857036A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/708,857 US4057693A (en) 1976-07-28 1976-07-28 Logic control for electronic key telephone line circuit

Publications (1)

Publication Number Publication Date
BE857036A true BE857036A (fr) 1977-11-14

Family

ID=24847442

Family Applications (1)

Application Number Title Priority Date Filing Date
BE179543A BE857036A (fr) 1976-07-28 1977-07-22 Circuit de commande de ligne pour poste telephonique a clavier

Country Status (9)

Country Link
US (1) US4057693A (fr)
JP (1) JPS581875B2 (fr)
AU (1) AU514725B2 (fr)
BE (1) BE857036A (fr)
CA (1) CA1079428A (fr)
DE (1) DE2733476C2 (fr)
FR (1) FR2360217A1 (fr)
GB (1) GB1562956A (fr)
SE (1) SE431046B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194093A (en) * 1978-11-29 1980-03-18 International Telephone And Telegraph Corporation Key system protective apparatus
US4323735A (en) * 1980-09-26 1982-04-06 Bell Telephone Laboratories, Inc. Key telephone line shunt detector circuit
US4311880A (en) * 1980-11-10 1982-01-19 Bell Telephone Laboratories, Incorporated Key telephone hold arrangement
US4803718A (en) * 1987-03-06 1989-02-07 Tree Technologies Corporation Hold detecting and control circuit for a key telephone system
JP3046229B2 (ja) * 1995-10-04 2000-05-29 キヤノン株式会社 電話装置
JP4014762B2 (ja) * 1999-07-09 2007-11-28 松下電器産業株式会社 主装置および電話制御装置
US20030110431A1 (en) * 2001-12-10 2003-06-12 International Business Machines Corporation Scanning an allowed value into a group of latches

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920928A (en) * 1974-03-29 1975-11-18 Bell Telephone Labor Inc Line control circuit
USRE29078E (en) 1974-03-29 1976-12-14 Bell Telephone Laboratories, Incorporated Key telephone system
US3895192A (en) * 1974-07-25 1975-07-15 Bell Telephone Labor Inc Telephone line circuit hold control arrangement
US3925625A (en) * 1974-07-25 1975-12-09 Bell Telephone Labor Inc Transient controlled telephone line circuit

Also Published As

Publication number Publication date
DE2733476A1 (de) 1978-02-02
AU514725B2 (en) 1981-02-26
JPS5317007A (en) 1978-02-16
FR2360217B1 (fr) 1981-08-28
GB1562956A (en) 1980-03-19
FR2360217A1 (fr) 1978-02-24
DE2733476C2 (de) 1982-03-18
JPS581875B2 (ja) 1983-01-13
CA1079428A (fr) 1980-06-10
SE7708291L (sv) 1978-01-29
US4057693A (en) 1977-11-08
SE431046B (sv) 1983-12-27
AU2731677A (en) 1979-02-01

Similar Documents

Publication Publication Date Title
FR2386208B1 (fr) Circuit de commande pour un poste de communication
FR2345835A1 (fr) Circuit de commande pour un laser a injection
FR2371844B1 (fr) Autocommutateur telephonique a commande par microprocesseurs
FR2448818B1 (fr) Circuits d'alimentation a courant limite et d'egalisation automatique de signal, pour lignes telephoniques d'abonnes
FR2371841B1 (fr) Dispositif de commande a microprocesseurs pour autocommutateur telephonique
FR2344063A1 (fr) Circuit numerique de commande a deux voies au moins
FR2306468A1 (fr) Circuit de commande adaptative de dispositif de fusion de machine xerographique
BE860182A (fr) Circuit d'appareil de poste telephonique a touches
FR2301043A1 (fr) Agencement de commutation pour un dispositif electronique portable
GB1550721A (en) Circuit arrangement for a loudspeaking telephone
BE857036A (fr) Circuit de commande de ligne pour poste telephonique a clavier
FR2341894A1 (fr) Regulateur du type a commutation pour recepteur de television
FR2515867B1 (fr) Dispositif a contacteurs de commande de circuits electriques
FR2323223A1 (fr) Mecanisme de commande pour contacts de commutateurs
FR2349247A1 (fr) Dispositif de commande de pupitre d'operateur pour un central telephonique
BE852408A (fr) Mecanisme de commande d'un disjoncteur
FR2381424B1 (fr) Pupitre de commande telephonique
SE7606718L (sv) Omkopplingsanordning for en automatisk telefonkommunikatiosnvexel
FR2334250A1 (fr) Circuit de commande de sonnerie telephonique
GB2050114B (en) Line circuit for a telephone line
FR2517911B1 (fr) Circuit de commande pour dispositif de conversation telephonique a mains libres
BE870240A (fr) Agencement de circuit pour central telephonique d'abonne muni d'un circuit de commutation a commande centrale
AU508306B2 (en) Telephone exchange possessing a switching network controlled via mai-ker circuits
BE870379A (fr) Poste telephonique a clavier
FR2351532A1 (fr) Dispositif de commutation pour la commande d'au moins un recepteur electrique

Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: WESTERN ELECTRIC CY INC.

Effective date: 19890731