ATA986172A - Uberwachungsschaltung in einer telephonzentrale, insbesondere am bedienungsplatz einer nebenstellenanlage - Google Patents

Uberwachungsschaltung in einer telephonzentrale, insbesondere am bedienungsplatz einer nebenstellenanlage

Info

Publication number
ATA986172A
ATA986172A AT986172A AT986172A ATA986172A AT A986172 A ATA986172 A AT A986172A AT 986172 A AT986172 A AT 986172A AT 986172 A AT986172 A AT 986172A AT A986172 A ATA986172 A AT A986172A
Authority
AT
Austria
Prior art keywords
control unit
monitoring circuit
telephone control
extension system
operating station
Prior art date
Application number
AT986172A
Other languages
English (en)
Other versions
AT327990B (de
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 ATA986172A publication Critical patent/ATA986172A/de
Application granted granted Critical
Publication of AT327990B publication Critical patent/AT327990B/de

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
    • H04Q3/54—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker in which the logic circuitry controlling the exchange is centralised
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
AT986172A 1971-11-24 1972-11-20 Uberwachungsschaltung in einer telephonzentrale, insbesondere am bedienungsplatz einer nebenstellenanlage AT327990B (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US20191871A 1971-11-24 1971-11-24

Publications (2)

Publication Number Publication Date
ATA986172A true ATA986172A (de) 1975-05-15
AT327990B AT327990B (de) 1976-02-25

Family

ID=22747831

Family Applications (2)

Application Number Title Priority Date Filing Date
AT986072A AT336693B (de) 1971-11-24 1972-11-20 Fernsprechvermittlungsanlage
AT986172A AT327990B (de) 1971-11-24 1972-11-20 Uberwachungsschaltung in einer telephonzentrale, insbesondere am bedienungsplatz einer nebenstellenanlage

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT986072A AT336693B (de) 1971-11-24 1972-11-20 Fernsprechvermittlungsanlage

Country Status (16)

Country Link
US (1) US3740485A (de)
JP (2) JPS5237928B2 (de)
AR (1) AR202786A1 (de)
AT (2) AT336693B (de)
AU (2) AU462325B2 (de)
BE (2) BE791688A (de)
BR (2) BR7208197D0 (de)
CA (2) CA949245A (de)
CH (2) CH550520A (de)
DE (1) DE2256997C3 (de)
ES (2) ES409257A1 (de)
FR (2) FR2162943A5 (de)
GB (2) GB1416547A (de)
IT (2) IT975843B (de)
NL (2) NL7215457A (de)
SE (2) SE375212B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4035592A (en) * 1970-12-10 1977-07-12 Societe Francaise Des Telephones Ericsson Subscriber monitoring unit for electronic telephone exchanges
FR2167361A5 (de) * 1972-01-13 1973-08-24 Ericsson Telefon Ab L M
US4417335A (en) * 1979-12-19 1983-11-22 Gte Automatic Electric Labs Inc. Digital satellite telephone office
JPS6144304Y2 (de) * 1980-08-14 1986-12-13
JPS6026857A (ja) * 1983-07-20 1985-02-09 Koyo Seiki Kk チエンジドラムの製造方法
GB2251156A (en) * 1990-12-18 1992-06-24 Sangara Ind Co Ltd Telephone warning light actuated by incoming call or lifting receiver
US5157721A (en) * 1990-12-18 1992-10-20 Paul Lee Control circuit for an electrical telephone accessory
JP3351817B2 (ja) * 1992-06-11 2002-12-03 株式会社日立テレコムテクノロジー 直通回線着信先可変システム
US6546091B1 (en) * 1998-08-28 2003-04-08 Thomson Licensing S.A. Automatic detection of phone system settings for dial-up modem connections

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE629372A (de) * 1962-03-08
US3239610A (en) * 1962-12-26 1966-03-08 Bell Telephone Labor Inc Line circuit for key telephone system
US3333062A (en) * 1964-04-14 1967-07-25 Automatic Elect Lab Centralized switching arrangements with inward dialing
US3441678A (en) * 1965-09-03 1969-04-29 Bell Telephone Labor Inc Conference circuit with selective call splitting
CA920258A (en) * 1969-04-23 1973-01-30 Itt Canada Limited Key telephone systems using pushbutton or rotary dials

Also Published As

Publication number Publication date
CA949245A (en) 1974-06-11
NL7215454A (de) 1973-05-28
ES409258A1 (es) 1975-10-01
GB1416547A (en) 1975-12-03
IT975844B (it) 1974-08-10
SE375212B (de) 1975-04-07
US3740485A (en) 1973-06-19
CH550520A (de) 1974-06-14
BR7208198D0 (pt) 1973-08-30
AT336693B (de) 1977-05-25
AU4905472A (en) 1974-05-23
JPS543561B2 (de) 1979-02-24
FR2162942A5 (de) 1973-07-20
ES409257A1 (es) 1975-10-01
AR202786A1 (es) 1975-07-24
SE386556B (sv) 1976-08-09
DE2256997C3 (de) 1979-01-04
DE2257022B2 (de) 1975-10-02
JPS5237928B2 (de) 1977-09-26
CA968877A (en) 1975-06-03
DE2256997B2 (de) 1975-06-12
ATA986072A (de) 1976-09-15
AT327990B (de) 1976-02-25
IT975843B (it) 1974-08-10
JPS4864807A (de) 1973-09-07
CH552317A (de) 1974-07-31
BR7208197D0 (pt) 1973-09-13
BE791688A (fr) 1973-03-16
AU4905372A (en) 1974-05-23
AU462326B2 (en) 1975-06-19
JPS4864806A (de) 1973-09-07
NL7215457A (de) 1973-05-28
DE2256997A1 (de) 1973-06-07
BE791689A (fr) 1973-03-16
AU462325B2 (en) 1975-06-19
GB1416546A (en) 1975-12-03
FR2162943A5 (de) 1973-07-20
DE2257022A1 (de) 1973-06-07
NL160136C (nl) 1979-09-17
NL160136B (nl) 1979-04-17

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee