GB1452386A - Electronic trunk junctor - Google Patents

Electronic trunk junctor

Info

Publication number
GB1452386A
GB1452386A GB4886074A GB4886074A GB1452386A GB 1452386 A GB1452386 A GB 1452386A GB 4886074 A GB4886074 A GB 4886074A GB 4886074 A GB4886074 A GB 4886074A GB 1452386 A GB1452386 A GB 1452386A
Authority
GB
United Kingdom
Prior art keywords
trunk
transistor
circuit
photo
led
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
GB4886074A
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of GB1452386A publication Critical patent/GB1452386A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/0096—Trunk circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
GB4886074A 1973-11-16 1974-11-12 Electronic trunk junctor Expired GB1452386A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7340850A FR2251975B1 (enrdf_load_stackoverflow) 1973-11-16 1973-11-16

Publications (1)

Publication Number Publication Date
GB1452386A true GB1452386A (en) 1976-10-13

Family

ID=9127862

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4886074A Expired GB1452386A (en) 1973-11-16 1974-11-12 Electronic trunk junctor

Country Status (5)

Country Link
CH (1) CH596727A5 (enrdf_load_stackoverflow)
DE (1) DE2453094B2 (enrdf_load_stackoverflow)
FR (1) FR2251975B1 (enrdf_load_stackoverflow)
GB (1) GB1452386A (enrdf_load_stackoverflow)
ZA (1) ZA747128B (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2180680A1 (en) * 2008-10-25 2010-04-28 Huawei Technologies Co., Ltd. Separation device and method for transmitting voice signal

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2326100A1 (fr) * 1975-09-26 1977-04-22 Ericsson Telefon Ab L M Joncteur reseau de telephonie electronique
FR2372563A1 (fr) * 1976-11-25 1978-06-23 Ericsson Telefon Ab L M Joncteur reseau de telephonie electronique
CA1123131A (en) * 1978-02-28 1982-05-04 Michael C.J. Cowpland Transformerless trunk circuit
CH635216A5 (de) * 1978-10-25 1983-03-15 Hansjoerg Erne Geraet zur ueberwachung des linienstromes in einer telefonleitung.
DE2846934A1 (de) * 1978-10-27 1980-04-30 Siemens Ag Vollelektronische schleifenschlussschaltung
FR2500975B1 (fr) * 1981-02-27 1993-05-07 Cit Alcatel Self electronique
FR2530105B1 (fr) * 1982-07-07 1985-07-05 Constr Telephoniques Circuit de boucle pour ligne telephonique
FR2544144A1 (fr) * 1983-04-11 1984-10-12 Rosny Unite Tech Relais modulateur, notamment pour installations de telecommunications
FR2546351B1 (fr) * 1983-05-18 1989-02-24 Telecommunications Sa Circuit de ligne pour joncteur de reseau
DE3322642A1 (de) * 1983-06-23 1985-01-24 Siemens AG, 1000 Berlin und 8000 München Gabelschaltung fuer fernsprechstationen mit verstaerkern
DE3407226A1 (de) * 1984-02-28 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung fuer eine elektronische drossel in lautfernsprechstationen
DE3407202A1 (de) * 1984-02-28 1985-08-29 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung fuer eine elektronische drossel in lautfernsprechstationen
DE3604491A1 (de) * 1986-02-13 1987-08-20 Gaertner Karl Telegaertner Vorrichtung mit einem bistabilen relais
DE3804216A1 (de) * 1988-02-11 1989-08-24 Telefonbau & Normalzeit Gmbh Schaltungsanordnung fuer eine externleitungsuebertragung von kommunikations-vermittlungsanlagen, insbesondere fernsprechnebenstellenanlagen
GB2220820B (en) * 1988-07-13 1992-07-08 Philips Electronic Associated Telephone line loop current regulator
DE4337530A1 (de) * 1993-11-04 1995-05-11 Bergermann Petra Modul für die Anschaltung von Geräten an das öffentliche Telefonnetz

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2180680A1 (en) * 2008-10-25 2010-04-28 Huawei Technologies Co., Ltd. Separation device and method for transmitting voice signal
US8537809B2 (en) 2008-10-25 2013-09-17 Huawei Technologies Co., Ltd. Separation device and method for transmitting voice signal

Also Published As

Publication number Publication date
DE2453094B2 (de) 1979-11-29
ZA747128B (en) 1975-11-26
CH596727A5 (enrdf_load_stackoverflow) 1978-03-15
DE2453094A1 (de) 1975-05-22
FR2251975A1 (enrdf_load_stackoverflow) 1975-06-13
FR2251975B1 (enrdf_load_stackoverflow) 1979-08-03

Similar Documents

Publication Publication Date Title
GB1452386A (en) Electronic trunk junctor
US3742151A (en) Communication call holding and supervising circuit
US4321429A (en) Apparatus for selecting terminal equipment in telephone lines
US4145577A (en) Ringing control apparatus
GB1386138A (en) Ring trip circuit
ES8402943A1 (es) Perfeccionamientos en un aparato para probar la capacidad de funcionamiento de un dispositivo semiconductor.
US3940954A (en) Electrical supervisory circuit arrangements
US4093830A (en) Key telephone system line circuit
CA1069632A (en) Telephone line battery boost circuit
GB1383587A (en) Ringing arrangement for telephone exchange
US3969591A (en) Circuit for preventing impulse generation by operating a hook switch in a telephone set
CN207504842U (zh) 用于水下金属探测器的开关电路
US3992591A (en) Telephone line battery boost circuit
CA1079881A (en) Key telephone lamp control circuit
US4127747A (en) Voltage boost circuit for telephone systems
FR2324183A1 (fr) Circuit de detection de l'etat d'une ligne d'abonne et de connexion du courant d'appel dans les systemes de commutation telephonique
CA1068835A (en) Voltage boost circuit for telephone systems
GB1323510A (en) Electric control circuit for a textile machine
CA1113174A (en) Circuit arrangement for receiving simplex and duplex current telegraph characters
JPS5799035A (en) Two-wire type electronic switch
GB1306547A (en) Voltage regulators for ac generators
KR890005368B1 (ko) 홀드회로와 뮤트회로가 내장된 전화기회로
EP0324486A2 (en) Circuit arrangement for compensation of the tripping time of an electric current switch
GB1478219A (en) Telecommunication exchange circuits
JPS5834839Y2 (ja) ダイヤルインパルス検出回路

Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee