NL8101612A - Lijntestcircuit voor een abonneetelefoontoestel. - Google Patents

Lijntestcircuit voor een abonneetelefoontoestel. Download PDF

Info

Publication number
NL8101612A
NL8101612A NL8101612A NL8101612A NL8101612A NL 8101612 A NL8101612 A NL 8101612A NL 8101612 A NL8101612 A NL 8101612A NL 8101612 A NL8101612 A NL 8101612A NL 8101612 A NL8101612 A NL 8101612A
Authority
NL
Netherlands
Prior art keywords
circuit
transistor
resistor
subscriber
voltage
Prior art date
Application number
NL8101612A
Other languages
English (en)
Dutch (nl)
Original Assignee
Philips 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 Philips Nv filed Critical Philips Nv
Priority to NL8101612A priority Critical patent/NL8101612A/nl
Priority to NL8103419A priority patent/NL8103419A/nl
Priority to CA000399222A priority patent/CA1189208A/en
Priority to FR8205312A priority patent/FR2503376A1/fr
Priority to JP4922582A priority patent/JPS57174968A/ja
Priority to GB8209185A priority patent/GB2097632B/en
Priority to SE8201980A priority patent/SE448043B/sv
Priority to SE8201980D priority patent/SE8201980L/xx
Priority to BE0/207715A priority patent/BE892702A/fr
Priority to US06/363,683 priority patent/US4476352A/en
Priority to DE19823211811 priority patent/DE3211811A1/de
Publication of NL8101612A publication Critical patent/NL8101612A/nl

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
NL8101612A 1981-04-01 1981-04-01 Lijntestcircuit voor een abonneetelefoontoestel. NL8101612A (nl)

Priority Applications (11)

Application Number Priority Date Filing Date Title
NL8101612A NL8101612A (nl) 1981-04-01 1981-04-01 Lijntestcircuit voor een abonneetelefoontoestel.
NL8103419A NL8103419A (nl) 1981-04-01 1981-07-20 Lijntestcircuit voor een abonneetelefoontoestel.
CA000399222A CA1189208A (en) 1981-04-01 1982-03-24 Subscriber's set
FR8205312A FR2503376A1 (fr) 1981-04-01 1982-03-29 Circuit d'essai de ligne pour un appareil telephonique d'abonne
JP4922582A JPS57174968A (en) 1981-04-01 1982-03-29 Substriber's line connecting circuit
GB8209185A GB2097632B (en) 1981-04-01 1982-03-29 Telephone subscriber's set and circuit therefor
SE8201980A SE448043B (sv) 1981-04-01 1982-03-29 Krets for anslutning mellan ledarna hos en abonnentledning via klykkontakten och parallellt med den ovriga delen av en abonnentapparat
SE8201980D SE8201980L (sv) 1981-04-01 1982-03-29 Abonnentapparat
BE0/207715A BE892702A (fr) 1981-04-01 1982-03-30 Circuit d'essai de ligne pour un appareil telephonique d'abonne
US06/363,683 US4476352A (en) 1981-04-01 1982-03-30 Telephone subscriber line looping circuit
DE19823211811 DE3211811A1 (de) 1981-04-01 1982-03-31 Leitungspruefschaltung fuer einen teilnehmerfernsprechapparat

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8101612A NL8101612A (nl) 1981-04-01 1981-04-01 Lijntestcircuit voor een abonneetelefoontoestel.
NL8101612 1981-04-01

Publications (1)

Publication Number Publication Date
NL8101612A true NL8101612A (nl) 1982-11-01

Family

ID=19837271

Family Applications (1)

Application Number Title Priority Date Filing Date
NL8101612A NL8101612A (nl) 1981-04-01 1981-04-01 Lijntestcircuit voor een abonneetelefoontoestel.

Country Status (2)

Country Link
JP (1) JPS57174968A (enrdf_load_stackoverflow)
NL (1) NL8101612A (enrdf_load_stackoverflow)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54132107A (en) * 1978-04-05 1979-10-13 Nec Corp Call current supply circuit

Also Published As

Publication number Publication date
JPS57174968A (en) 1982-10-27
JPH033980B2 (enrdf_load_stackoverflow) 1991-01-21

Similar Documents

Publication Publication Date Title
KR870009238A (ko) 고전압검출회로
US3870831A (en) Telephone hold circuit
US4037120A (en) Electronic dipole for looping a telephone line
US4037220A (en) Circuit arrangement for monitoring interruptions in two closed-circuit loops
NL8103419A (nl) Lijntestcircuit voor een abonneetelefoontoestel.
US4984250A (en) DC termination circuit for subscriber cables
US4550223A (en) Test device, and method for locating faults in a two-lead line
NL8101612A (nl) Lijntestcircuit voor een abonneetelefoontoestel.
US4685120A (en) Electronic trigger switch for maintenance termination unit
US4626632A (en) Maintenance termination unit
US4431871A (en) Solid state relay
US4099031A (en) Method and apparatus for automatically identifying an individual calling party on a multiparty telephone line
KR880000868B1 (ko) 스위칭 회로망
US3953683A (en) Interrupter for telephone systems
US4151377A (en) High impedance loop-seizing and dial pulsing circuit
US3617655A (en) Disabling circuit of a transmission line amplifier
US4388498A (en) Voltage stabilizer suitable for use in a telephone set
US4686702A (en) Signal transmission control apparatus
US4190743A (en) Thyristor switching matrix
US3492439A (en) Telephone signalling circuit
EP0529633A2 (en) DC termination circuit for 2B1Q line-coded basic rate ISDN
US3163776A (en) Gate circuit
SU1385314A1 (ru) Устройство дл передачи телеграфных сигналов
SU1497759A1 (ru) Устройство дл удержани телефонного соединени
SU1260865A1 (ru) Устройство дл контрол и сигнализации напр жени

Legal Events

Date Code Title Description
A1B A search report has been drawn up
BV The patent application has lapsed