FI62437B - Telekommunikationssystem - Google Patents

Telekommunikationssystem Download PDF

Info

Publication number
FI62437B
FI62437B FI762818A FI762818A FI62437B FI 62437 B FI62437 B FI 62437B FI 762818 A FI762818 A FI 762818A FI 762818 A FI762818 A FI 762818A FI 62437 B FI62437 B FI 62437B
Authority
FI
Finland
Prior art keywords
terminal
telecommunication system
signals
transmission
monitoring circuit
Prior art date
Application number
FI762818A
Other languages
English (en)
Swedish (sv)
Other versions
FI62437C (fi
FI762818A (fi
Inventor
Per Anders Bengt Toernqvist
Original Assignee
Ericsson Telefon Ab L M
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 Ab L M filed Critical Ericsson Telefon Ab L M
Publication of FI762818A publication Critical patent/FI762818A/fi
Publication of FI62437B publication Critical patent/FI62437B/fi
Application granted granted Critical
Publication of FI62437C publication Critical patent/FI62437C/fi

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/22Arrangements for supervision, monitoring or testing
    • H04M3/2209Arrangements for supervision, monitoring or testing for lines also used for data transmission

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Amplifiers (AREA)
  • Control Of Eletrric Generators (AREA)
FI762818A 1975-10-24 1976-10-04 Telekommunikationssystem FI62437C (fi)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7511950 1975-10-24
SE7511950A SE387807B (sv) 1975-10-24 1975-10-24 Telekommunikationssystem i vilket ett larm vid ett avbrott i en tvavegs overforing av signaler er anordnat att kunna inhiberas

Publications (3)

Publication Number Publication Date
FI762818A FI762818A (fi) 1977-04-25
FI62437B true FI62437B (fi) 1982-08-31
FI62437C FI62437C (fi) 1982-12-10

Family

ID=20325897

Family Applications (1)

Application Number Title Priority Date Filing Date
FI762818A FI62437C (fi) 1975-10-24 1976-10-04 Telekommunikationssystem

Country Status (4)

Country Link
DK (1) DK141230B (fi)
FI (1) FI62437C (fi)
NO (1) NO137876C (fi)
SE (1) SE387807B (fi)

Also Published As

Publication number Publication date
NO137876C (no) 1978-05-24
DK141230B (da) 1980-02-04
SE387807B (sv) 1976-09-13
NO763607L (fi) 1977-04-26
DK141230C (fi) 1980-07-21
FI62437C (fi) 1982-12-10
NO137876B (no) 1978-01-30
DK480276A (fi) 1977-04-25
FI762818A (fi) 1977-04-25

Similar Documents

Publication Publication Date Title
NL192418C (nl) Stelsel voor het verschaffen van signaaloverdracht tussen een telefooncentrale en instrumenten die zijn geplaatst in de percelen van telefoonabonnees.
US4119815A (en) Central station system including secondary communication path established through commercial telephone network
JPS6470898A (en) Interactive type alarm reporting system with monitoring
JPS6411175B2 (fi)
US4741022A (en) Remote subscriber interaction system
US4392024A (en) Electronic key telephone set circuit for permitting dialing during failure of commercial power supplied to the set
US4150260A (en) Subscriber's circuit for four-wire-system local switch
FI62437B (fi) Telekommunikationssystem
EP0385804B1 (en) Network termination equipment
CA1228185A (en) Subscriber's line closing circuit
EP0058470A1 (en) Trunk interface circuit with current compensation
US3689700A (en) Subscriber loop extension unit
US2319339A (en) Signaling system
US4101733A (en) Electronic DX signaling circuit
JPS6337547B2 (fi)
JPS5795744A (en) Automatic line switching device for data communication device
US2040691A (en) Selective code receiver
JPH0577227B2 (fi)
US760399A (en) Selective signal system.
SU1737749A1 (ru) Коммутационна станци
US803890A (en) Telephone night-watch system.
JPS5624864A (en) Automatic dial transmitter with guard function
US2865983A (en) Automatic attachment switch-over device, in particular for teleprinters
US1953273A (en) Telegraph signaling system
SU966924A1 (ru) Устройство дл двухпроводного дуплексного телеграфировани

Legal Events

Date Code Title Description
MA Patent expired
MA Patent expired

Owner name: OY L M ERICSSON AB