NO802825L - Interkom-system - Google Patents

Interkom-system

Info

Publication number
NO802825L
NO802825L NO802825A NO802825A NO802825L NO 802825 L NO802825 L NO 802825L NO 802825 A NO802825 A NO 802825A NO 802825 A NO802825 A NO 802825A NO 802825 L NO802825 L NO 802825L
Authority
NO
Norway
Prior art keywords
telephone
circuit
subscriber station
signal
selection
Prior art date
Application number
NO802825A
Other languages
English (en)
Norwegian (no)
Inventor
Petrus Dingeman Avontuur
Adrianus Gerardus Corneli Bend
Original Assignee
Ericsson Telefon Mij
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 Telefon Mij filed Critical Ericsson Telefon Mij
Publication of NO802825L publication Critical patent/NO802825L/no

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/26Devices for calling a subscriber
    • H04M1/30Devices which can set up and transmit only one digit at a time
    • H04M1/31Devices 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
    • H04M1/312Devices 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/71Substation extension arrangements
    • H04M1/715Substation extension arrangements using two or more extensions per line
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M9/00Arrangements for interconnection not involving centralised switching
    • H04M9/002Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005Arrangements 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
    • H04M9/007Arrangements 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)
NO802825A 1979-09-25 1980-09-24 Interkom-system NO802825L (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7907134A NL7907134A (nl) 1979-09-25 1979-09-25 Telefooninstallatie van de als sterpuntinstallatie aangeduide soort.

Publications (1)

Publication Number Publication Date
NO802825L true NO802825L (no) 1981-03-26

Family

ID=19833910

Family Applications (1)

Application Number Title Priority Date Filing Date
NO802825A NO802825L (no) 1979-09-25 1980-09-24 Interkom-system

Country Status (10)

Country Link
AU (1) AU6265780A (fr)
DK (1) DK403980A (fr)
ES (1) ES495348A0 (fr)
FI (1) FI802986A (fr)
FR (1) FR2466161A1 (fr)
GB (1) GB2060316A (fr)
IT (1) IT1149255B (fr)
NL (1) NL7907134A (fr)
NO (1) NO802825L (fr)
SE (1) SE8006662L (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3000858C2 (de) * 1980-01-11 1986-11-13 Neumann Elektronik GmbH, 4330 Mülheim Tastengesteuerte Wechsel-, Gegen- oder Lautsprechanlage
US4744103A (en) * 1985-11-27 1988-05-10 Rauland-Borg Corporation Computer controlled multi-link communication system
IN167984B (fr) * 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 (fr) * 1971-05-28 1973-05-25 Supravox Sarl
GB1369829A (en) * 1971-12-23 1974-10-09 Standard Telephones Cables Ltd Electric impulse transmitters
FR2285775A1 (fr) * 1974-09-17 1976-04-16 Berna Guy Installation d'interphones a appels selectifs
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
ES8105913A1 (es) 1981-06-16
FI802986A (fi) 1981-03-26
GB2060316A (en) 1981-04-29
IT1149255B (it) 1986-12-03
AU6265780A (en) 1981-04-09
SE8006662L (sv) 1981-03-26
ES495348A0 (es) 1981-06-16
IT8024872A0 (it) 1980-09-24
DK403980A (da) 1981-03-26
FR2466161A1 (fr) 1981-03-27
NL7907134A (nl) 1981-03-27

Similar Documents

Publication Publication Date Title
US4769837A (en) Device for adding intercom functions to a phone system
CA1210879A (fr) Systeme de telecommunication
US5048076A (en) Control apparatus for an automated telephone attendant
US5086458A (en) Telephone answering system and apparatus for direct caller selection of a party line extension
US4113986A (en) Telephone controlled lock release arrangement
US4028498A (en) Private automatic branch exchange system and apparatus
US4079212A (en) Extension telephone system
SE467810B (sv) Saett att signalera/kommunicera inom ett porttelefonsystem samt porttelefonsystem foer kommunikation enligt saettet
US3988549A (en) Keyboard type telephone station adapted to transmit dialling pulses and multifrequency signals
JPH05160886A (ja) ディジタル端末装置
US4408102A (en) Two-wire exchange telephone system
US3420963A (en) Communication system line circuit particularly for key telephone systems
NO802825L (no) Interkom-system
US3784756A (en) Subscriber loop range extender
US4219700A (en) Partyline subscriber interface circuit
US2975237A (en) Telephone conference circuit
US3166642A (en) Signaling arrangement
US4095056A (en) Toll restrictor access circuit
US5005199A (en) Telephone interface circuit
US3647983A (en) Key system line card circuit
US3591728A (en) Local ringing and ring-trip relay for carrier terminal
USRE23057E (en) atkins
US3378642A (en) Line lockout circuit
US2200820A (en) Automatic telephone system
NO166365B (no) Nye 7-acyl-3-halogenindoler som er anvendbare som mellomprodukter ved fremstilling av 7-acylindolin-2-oner.