FI62437C - Telekommunikationssystem - Google Patents

Telekommunikationssystem Download PDF

Info

Publication number
FI62437C
FI62437C FI762818A FI762818A FI62437C FI 62437 C FI62437 C FI 62437C FI 762818 A FI762818 A FI 762818A FI 762818 A FI762818 A FI 762818A FI 62437 C FI62437 C FI 62437C
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
FI62437B (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 FI62437B (fi) 1982-08-31
FI62437C true 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
FI62437B (fi) 1982-08-31
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
KR940020754A (ko) 최종 사용자 사이에서의 데이타 및 감독 신호 전송/수신 장치 및 방법(Emorgency local switching)
FI62437C (fi) Telekommunikationssystem
US2460702A (en) Registration system
EP0385804B1 (en) Network termination equipment
CA1228185A (en) Subscriber's line closing circuit
JPS57152266A (en) Fault information system
US3689700A (en) Subscriber loop extension unit
US4435619A (en) Switching network interfacing telephone-exchange equipment with two-subscriber party line
JPS5795744A (en) Automatic line switching device for data communication device
JPH0577227B2 (fi)
US760399A (en) Selective signal system.
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
JPS62107536A (ja) 電力線搬送波通信装置
JPS577686A (en) Prevention system for failure in recovery from fault of manual holding circuit
US1953273A (en) Telegraph signaling system
SU966924A1 (ru) Устройство дл двухпроводного дуплексного телеграфировани
JP3062227B2 (ja) 火災報知設備における端末機器
JP2689629B2 (ja) 遠隔警報収集方式
JPH069398B2 (ja) 発着信衝突検出回路
GB1462096A (en) Electrical signalling system

Legal Events

Date Code Title Description
MA Patent expired
MA Patent expired

Owner name: OY L M ERICSSON AB