JPS5199408A - - Google Patents

Info

Publication number
JPS5199408A
JPS5199408A JP50024015A JP2401575A JPS5199408A JP S5199408 A JPS5199408 A JP S5199408A JP 50024015 A JP50024015 A JP 50024015A JP 2401575 A JP2401575 A JP 2401575A JP S5199408 A JPS5199408 A JP S5199408A
Authority
JP
Japan
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.)
Pending
Application number
JP50024015A
Inventor
Takuji Mukaemachi
Tetsuo Takeshita
Ki Myoshi
Kimifumi Kojima
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP50024015A priority Critical patent/JPS5199408A/ja
Priority to US05/661,660 priority patent/US4075431A/en
Priority to DE2608171A priority patent/DE2608171C3/de
Publication of JPS5199408A publication Critical patent/JPS5199408A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages
JP50024015A 1975-02-28 1975-02-28 Pending JPS5199408A (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP50024015A JPS5199408A (ja) 1975-02-28 1975-02-28
US05/661,660 US4075431A (en) 1975-02-28 1976-02-26 Speech path system
DE2608171A DE2608171C3 (de) 1975-02-28 1976-02-27 Schaltungsanordnung für eine zentralgesteuerte Fernsprechvermittlungsanlage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50024015A JPS5199408A (ja) 1975-02-28 1975-02-28

Publications (1)

Publication Number Publication Date
JPS5199408A true JPS5199408A (ja) 1976-09-02

Family

ID=12126711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50024015A Pending JPS5199408A (ja) 1975-02-28 1975-02-28

Country Status (3)

Country Link
US (1) US4075431A (ja)
JP (1) JPS5199408A (ja)
DE (1) DE2608171C3 (ja)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1552812A (en) * 1976-09-28 1979-09-19 Standard Telephones Cables Ltd Automatic telecommunication exchangers
FR2381425A2 (fr) * 1977-02-18 1978-09-15 Labo Cent Telecommunicat Circuit electronique d'injection de sonnerie
FR2366756A1 (fr) * 1976-09-30 1978-04-28 Labo Cent Telecommunicat Circuit electronique d'injection de sonnerie
NL7614118A (nl) * 1976-12-20 1978-06-22 Philips Nv Schakeling voor het beschermen van telefoon- lijnen.
FR2419625A1 (fr) * 1978-03-07 1979-10-05 Labo Cent Telecommunicat Dispositif de protection contre les surtensions de ligne telephonique
IT1159706B (it) * 1978-06-02 1987-03-04 Cselt Centro Studi Lab Telecom Circuito telefonico elettronico di linea d'utente
US6480596B1 (en) * 1993-05-07 2002-11-12 Samsung Electronics Co., Ltd. Direct inward-outward dialing trunk circuit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4868106A (ja) * 1971-12-20 1973-09-17
JPS4881407A (ja) * 1972-01-31 1973-10-31
JPS4891907A (ja) * 1972-03-08 1973-11-29
JPS4914073A (ja) * 1972-05-16 1974-02-07
JPS49123506A (ja) * 1973-03-30 1974-11-26

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410961A (en) * 1965-10-12 1968-11-12 Bell Telephone Labor Inc Line circuit for a telephone system having optical solid state means
FR1505558A (fr) * 1966-10-28 1967-12-15 Ibm France Matrice de commutation électronique protégée contre la diaphonie
FR94440E (fr) * 1967-12-12 1969-08-14 Labo Cent Telecommunicat Multisélecteur électronique.
FR1555813A (ja) * 1967-12-12 1969-01-31
FR2155120A5 (ja) * 1971-10-08 1973-05-18 Labo Cent Telecommunicat
FR2071181A6 (ja) * 1969-12-19 1971-09-17 Labo Cent Telecommunicat
US3828314A (en) * 1971-02-03 1974-08-06 Wescom End mark controlled switching system and matrix
US3826873A (en) * 1971-10-12 1974-07-30 Gte Sylvania Inc Switching circuit employing latching type semiconductor devices and associated control transistors
US3801749A (en) * 1972-06-20 1974-04-02 N Jovic Crosspoint switching matrix incorporating solid state thyristor crosspoints
US3865979A (en) * 1973-06-21 1975-02-11 Alfred Hestad Matrix control circuit
DE2333295A1 (de) * 1973-06-29 1975-01-23 Siemens Ag Elektronisches koppelvielfach
JPS5340288B2 (ja) * 1973-07-02 1978-10-26
DE2345880B1 (de) * 1973-09-12 1975-01-09 Telefonbau & Normalzeit Gmbh Schaltungsanordnung zum Erfassen von Schleifenzustaenden
US3838223A (en) * 1973-10-01 1974-09-24 Gte Automatic Electric Lab Inc Ring trip and dial pulse detection circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4868106A (ja) * 1971-12-20 1973-09-17
JPS4881407A (ja) * 1972-01-31 1973-10-31
JPS4891907A (ja) * 1972-03-08 1973-11-29
JPS4914073A (ja) * 1972-05-16 1974-02-07
JPS49123506A (ja) * 1973-03-30 1974-11-26

Also Published As

Publication number Publication date
DE2608171B2 (de) 1979-06-13
DE2608171C3 (de) 1984-09-06
DE2608171A1 (de) 1976-09-16
US4075431A (en) 1978-02-21

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