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IT1137365B - Impianto di intercomunicazione elettronico - Google Patents

Impianto di intercomunicazione elettronico

Info

Publication number
IT1137365B
IT1137365B IT21158/81A IT2115881A IT1137365B IT 1137365 B IT1137365 B IT 1137365B IT 21158/81 A IT21158/81 A IT 21158/81A IT 2115881 A IT2115881 A IT 2115881A IT 1137365 B IT1137365 B IT 1137365B
Authority
IT
Italy
Prior art keywords
intercommunication system
electronic intercommunication
electronic
intercommunication
Prior art date
Application number
IT21158/81A
Other languages
English (en)
Other versions
IT8121158A0 (it
Inventor
Jean-Pierre Chambon
Andre Bohn
Original Assignee
Telephonie Ind Commerciale
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 Telephonie Ind Commerciale filed Critical Telephonie Ind Commerciale
Publication of IT8121158A0 publication Critical patent/IT8121158A0/it
Application granted granted Critical
Publication of IT1137365B publication Critical patent/IT1137365B/it

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
    • H04M9/007—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 wherein the key telephone sets are star-connected to a central unit by a limited number of lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Accommodation For Nursing Or Treatment Tables (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
IT21158/81A 1980-04-16 1981-04-14 Impianto di intercomunicazione elettronico IT1137365B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8008671A FR2481033B1 (fr) 1980-04-16 1980-04-16 Installation d'intercommunication electronique

Publications (2)

Publication Number Publication Date
IT8121158A0 IT8121158A0 (it) 1981-04-14
IT1137365B true IT1137365B (it) 1986-09-10

Family

ID=9241034

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21158/81A IT1137365B (it) 1980-04-16 1981-04-14 Impianto di intercomunicazione elettronico

Country Status (13)

Country Link
JP (1) JPS579190A (it)
BE (1) BE888435A (it)
BR (1) BR8102253A (it)
DE (1) DE3114977A1 (it)
DK (1) DK170081A (it)
ES (1) ES8203183A1 (it)
FR (1) FR2481033B1 (it)
GB (1) GB2075306B (it)
IE (1) IE51482B1 (it)
IT (1) IT1137365B (it)
MX (1) MX149212A (it)
PT (1) PT72871B (it)
SE (1) SE8102382L (it)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59228828A (ja) * 1983-06-11 1984-12-22 萱沢　文男 眼体の螢光量測定装置
US4638124A (en) * 1984-09-21 1987-01-20 Itt Corporation Key telephone system with distributed control

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53119606A (en) * 1977-03-28 1978-10-19 Toshiba Corp Double concentrating transmission system of tree-pair line
US4112261A (en) * 1977-05-16 1978-09-05 The Anaconda Company Key telephone system and method

Also Published As

Publication number Publication date
IE810839L (en) 1981-10-16
PT72871B (fr) 1982-03-29
BR8102253A (pt) 1981-11-24
JPS579190A (en) 1982-01-18
ES501298A0 (es) 1982-03-01
DK170081A (da) 1981-10-17
FR2481033A1 (fr) 1981-10-23
FR2481033B1 (fr) 1987-11-06
GB2075306A (en) 1981-11-11
IT8121158A0 (it) 1981-04-14
BE888435A (fr) 1981-07-31
MX149212A (es) 1983-09-23
IE51482B1 (en) 1987-01-07
PT72871A (fr) 1981-05-01
ES8203183A1 (es) 1982-03-01
GB2075306B (en) 1985-02-13
SE8102382L (sv) 1981-10-17
DE3114977A1 (de) 1982-03-18

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