CH521075A - Circuit arrangement for telephone systems with several connecting lines and several intercom stations which can be connected to these lines by actuating individual buttons assigned to the lines - Google Patents

Circuit arrangement for telephone systems with several connecting lines and several intercom stations which can be connected to these lines by actuating individual buttons assigned to the lines

Info

Publication number
CH521075A
CH521075A CH120371A CH120371A CH521075A CH 521075 A CH521075 A CH 521075A CH 120371 A CH120371 A CH 120371A CH 120371 A CH120371 A CH 120371A CH 521075 A CH521075 A CH 521075A
Authority
CH
Switzerland
Prior art keywords
lines
several
circuit arrangement
telephone systems
individual buttons
Prior art date
Application number
CH120371A
Other languages
German (de)
Inventor
Plotzizka Horst
Original Assignee
Siemens Ag
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
Priority claimed from DE19702024360 external-priority patent/DE2024360C/en
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of CH521075A publication Critical patent/CH521075A/en

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
CH120371A 1970-05-19 1971-01-27 Circuit arrangement for telephone systems with several connecting lines and several intercom stations which can be connected to these lines by actuating individual buttons assigned to the lines CH521075A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702024360 DE2024360C (en) 1970-05-19 Circuit arrangement for telephone systems with several connecting lines and several intercom stations that can be connected to these lines by actuating individual buttons assigned to the lines

Publications (1)

Publication Number Publication Date
CH521075A true CH521075A (en) 1972-03-31

Family

ID=5771461

Family Applications (1)

Application Number Title Priority Date Filing Date
CH120371A CH521075A (en) 1970-05-19 1971-01-27 Circuit arrangement for telephone systems with several connecting lines and several intercom stations which can be connected to these lines by actuating individual buttons assigned to the lines

Country Status (7)

Country Link
AT (1) AT308841B (en)
BE (1) BE767393A (en)
CH (1) CH521075A (en)
FR (1) FR2112891A5 (en)
GB (1) GB1309498A (en)
LU (1) LU63172A1 (en)
NL (1) NL154083B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2605540A1 (en) * 1976-02-10 1977-08-11 Deutsche Telephonwerk Kabel TELEPHONE SYSTEM, IN PARTICULAR KEY-CONTROLLED SERIES SYSTEM WITH LIS-TO-SPEAK DEVICES

Also Published As

Publication number Publication date
FR2112891A5 (en) 1972-06-23
NL154083B (en) 1977-07-15
AT308841B (en) 1973-07-25
LU63172A1 (en) 1971-09-01
BE767393A (en) 1971-11-19
DE2024360A1 (en) 1971-11-25
GB1309498A (en) 1973-03-14
NL7106392A (en) 1971-11-23
DE2024360B2 (en) 1971-11-25

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Legal Events

Date Code Title Description
PL Patent ceased