DK141230B - Telekommunikationsanlæg med automatisk alarm ved afbrydelse af signaloverføringen. - Google Patents

Telekommunikationsanlæg med automatisk alarm ved afbrydelse af signaloverføringen. Download PDF

Info

Publication number
DK141230B
DK141230B DK480276AA DK480276A DK141230B DK 141230 B DK141230 B DK 141230B DK 480276A A DK480276A A DK 480276AA DK 480276 A DK480276 A DK 480276A DK 141230 B DK141230 B DK 141230B
Authority
DK
Denmark
Prior art keywords
terminal
telecommunication system
signals
transmission
circuit
Prior art date
Application number
DK480276AA
Other languages
Danish (da)
English (en)
Other versions
DK480276A (sv
DK141230C (sv
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 DK480276A publication Critical patent/DK480276A/da
Publication of DK141230B publication Critical patent/DK141230B/da
Application granted granted Critical
Publication of DK141230C publication Critical patent/DK141230C/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2209—Arrangements 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)
DK480276AA 1975-10-24 1976-10-22 Telekommunikationsanlæg med automatisk alarm ved afbrydelse af signaloverføringen. DK141230B (da)

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
DK480276A DK480276A (sv) 1977-04-25
DK141230B true DK141230B (da) 1980-02-04
DK141230C DK141230C (sv) 1980-07-21

Family

ID=20325897

Family Applications (1)

Application Number Title Priority Date Filing Date
DK480276AA DK141230B (da) 1975-10-24 1976-10-22 Telekommunikationsanlæg med automatisk alarm ved afbrydelse af signaloverføringen.

Country Status (4)

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

Also Published As

Publication number Publication date
NO137876B (no) 1978-01-30
FI62437C (fi) 1982-12-10
FI762818A (sv) 1977-04-25
DK480276A (sv) 1977-04-25
FI62437B (fi) 1982-08-31
DK141230C (sv) 1980-07-21
SE387807B (sv) 1976-09-13
NO763607L (sv) 1977-04-26
NO137876C (no) 1978-05-24

Similar Documents

Publication Publication Date Title
KR940020754A (ko) 최종 사용자 사이에서의 데이타 및 감독 신호 전송/수신 장치 및 방법(Emorgency local switching)
US4392024A (en) Electronic key telephone set circuit for permitting dialing during failure of commercial power supplied to the set
GB1154647A (en) Supervisory Circuit for Unattended Repeaters.
DK141230B (da) Telekommunikationsanlæg med automatisk alarm ved afbrydelse af signaloverføringen.
EP0385804B1 (en) Network termination equipment
US4638124A (en) Key telephone system with distributed control
CA1228185A (en) Subscriber's line closing circuit
US2355642A (en) System for the conversion and retransmission of control signals
US3529087A (en) Automatic line releasing apparatus
US4224476A (en) Multiparty subscriber loop carrier systems
US3591728A (en) Local ringing and ring-trip relay for carrier terminal
US3742155A (en) Call source verification arrangement
GB2242100A (en) Alarm communication controller
SU1185620A2 (ru) Устройство дл телеконтрол оконечной станции цифровой системы св зи
SU1737749A1 (ru) Коммутационна станци
US3123675A (en) Frequency selective signalling system
JPS6039970A (ja) 極性反転検出回路
US3084231A (en) Remote testing arrangement
US5103473A (en) Telephone system communication mechanism employing central office sleeve lead
US5280522A (en) Circuit for transmitting voice signals and dial pulses
US2685616A (en) Trunk circuit monitoring signal
JPS5624864A (en) Automatic dial transmitter with guard function
US1513453A (en) Half-duplex morse carrier system
SU943805A1 (ru) Устройство дл контрол системы телемеханики с решающей обратной св зью
US1708934A (en) Electric signaling

Legal Events

Date Code Title Description
PUP Patent expired