ES495348A0 - TELEPHONE SYSTEM FOR PRIVATE USE - Google Patents

TELEPHONE SYSTEM FOR PRIVATE USE

Info

Publication number
ES495348A0
ES495348A0 ES495348A ES495348A ES495348A0 ES 495348 A0 ES495348 A0 ES 495348A0 ES 495348 A ES495348 A ES 495348A ES 495348 A ES495348 A ES 495348A ES 495348 A0 ES495348 A0 ES 495348A0
Authority
ES
Spain
Prior art keywords
telephone system
private use
private
telephone
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.)
Granted
Application number
ES495348A
Other languages
Spanish (es)
Other versions
ES8105913A1 (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.)
Ericsson Telefoon Maatschappij NV
Original Assignee
Ericsson Telefoon Maatschappij NV
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 Ericsson Telefoon Maatschappij NV filed Critical Ericsson Telefoon Maatschappij NV
Publication of ES495348A0 publication Critical patent/ES495348A0/en
Publication of ES8105913A1 publication Critical patent/ES8105913A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
    • 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)
  • Telephonic Communication Services (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
ES495348A 1979-09-25 1980-09-25 Intercom system Expired ES8105913A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7907134A NL7907134A (en) 1979-09-25 1979-09-25 TELEPHONE INSTALLATION OF THE TYPE INDICATED AS A STAR POINT INSTALLATION.

Publications (2)

Publication Number Publication Date
ES495348A0 true ES495348A0 (en) 1981-06-16
ES8105913A1 ES8105913A1 (en) 1981-06-16

Family

ID=19833910

Family Applications (1)

Application Number Title Priority Date Filing Date
ES495348A Expired ES8105913A1 (en) 1979-09-25 1980-09-25 Intercom system

Country Status (10)

Country Link
AU (1) AU6265780A (en)
DK (1) DK403980A (en)
ES (1) ES8105913A1 (en)
FI (1) FI802986A (en)
FR (1) FR2466161A1 (en)
GB (1) GB2060316A (en)
IT (1) IT1149255B (en)
NL (1) NL7907134A (en)
NO (1) NO802825L (en)
SE (1) SE8006662L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000858C2 (en) * 1980-01-11 1986-11-13 Neumann Elektronik GmbH, 4330 Mülheim Button-controlled exchange, counter or loudspeaker system
US4744103A (en) * 1985-11-27 1988-05-10 Rauland-Borg Corporation Computer controlled multi-link communication system
IN167984B (en) * 1986-09-23 1991-01-19 Siemens Ag
US4769837A (en) * 1987-05-04 1988-09-06 Eoa Systems, Inc. Device for adding intercom functions to a phone system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2139693B1 (en) * 1971-05-28 1973-05-25 Supravox Sarl
ZA728043B (en) * 1971-12-23 1973-07-25 Standard Telephones Cables Ltd Improvements in or relating to electric impulse transmitters
FR2285775A1 (en) * 1974-09-17 1976-04-16 Berna Guy Intercommunication system with selective calling - uses codes signals to alert slave stations branched from common line
US4088846A (en) * 1977-03-30 1978-05-09 Bell Telephone Laboratories, Incorporated Hold-plus-intercom for single-line stations

Also Published As

Publication number Publication date
SE8006662L (en) 1981-03-26
FR2466161A1 (en) 1981-03-27
AU6265780A (en) 1981-04-09
FI802986A (en) 1981-03-26
NO802825L (en) 1981-03-26
IT8024872A0 (en) 1980-09-24
DK403980A (en) 1981-03-26
ES8105913A1 (en) 1981-06-16
IT1149255B (en) 1986-12-03
GB2060316A (en) 1981-04-29
NL7907134A (en) 1981-03-27

Similar Documents

Publication Publication Date Title
ES493466A0 (en) CONNECTION DEVICE FOR CONDUCTIONS.
BR7901737A (en) DEVICE FOR SEATING TILES
ES506748A0 (en) SEALING SET FOR USE IN MECHANICAL DEVICES.
BR8008337A (en) LIFT SYSTEM
BR8002716A (en) TELEPHONE SYSTEM
IT1131148B (en) FUEL PUMPING DEVICE
ES495348A0 (en) TELEPHONE SYSTEM FOR PRIVATE USE
BR7908574A (en) Ditching Device
MX150066A (en) IMPROVED STRUCTURE FOR BUILDINGS
IT1134783B (en) LOCKING DEVICE FOR CONNECTION MEANS
BR8005682A (en) ANTI-SLAVE SYSTEM
IT1132304B (en) FUEL PUMPING DEVICE
IT1141329B (en) ENGINE SYSTEM
IT1140557B (en) FUEL PUMPING DEVICE
IT1133734B (en) FUEL PUMPING DEVICE
BR8003427A (en) PILE FOR FENCE
ES245210Y (en) BISERA FOR NIGHT USE
BR7802483A (en) PRIVATE CELL FOR THE PANORAMIC SYSTEM OFFICE
BR8007949A (en) TELEPHONE SYSTEM
IT7947857A0 (en) 5-PHENYL-2-OXAZOLE CARBOXYMIDAMIDI FOR PHARMACEUTICAL USE
ES244296Y (en) BRACING DEVICE FOR PLATANAS.
BR5900122U (en) PROTECTOR FOR MECHANICAL USE
BR5901004U (en) FITTING BLOCK SYSTEM FOR CIVIL CONSTRUCTION
IT7964289V0 (en) MILL FOR FAMILY USE.
BR7708479A (en) CONTROLLED EXCHANGE VIDEO-INTERPHONE SYSTEM FOR PRIVATE SERVICE