JPS5478912A - Subscriber circuit - Google Patents

Subscriber circuit

Info

Publication number
JPS5478912A
JPS5478912A JP14615377A JP14615377A JPS5478912A JP S5478912 A JPS5478912 A JP S5478912A JP 14615377 A JP14615377 A JP 14615377A JP 14615377 A JP14615377 A JP 14615377A JP S5478912 A JPS5478912 A JP S5478912A
Authority
JP
Japan
Prior art keywords
ringing
time
relay
circuit
ring trip
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
JP14615377A
Other languages
Japanese (ja)
Inventor
Akihiro Kitamura
Hiroshi Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP14615377A priority Critical patent/JPS5478912A/en
Publication of JPS5478912A publication Critical patent/JPS5478912A/en
Pending legal-status Critical Current

Links

Landscapes

  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE: To enable to make common the ring trip circuit with the subscribing circuits in number corresponding to the number of phases, by utilizing the phase relation of ringing.
CONSTITUTION: The ringing signal is delivered in the period of time T for a plurality of phases A to C from the signal source CR. At the incoming connection, the subscriber circuit receiving the ringing delivery indication from the processor stores information to FF4, the relay R is interrupted corresponding to the continuous pulse of the phase A with the AND element 5, the continuous ringing CR is delivered via the ring trip circuit 6 by the time t1 to the telephone set TEL, the relay R is restored in the time t2 and the subscriber is in the state of call out with this repetitive operation. Further, when the subscribers of No1 and No2 are simultaneously called, the identification of the subscribers can be made by obtaining the AND logic for the state of the relay R in operation at time t1 for the information detecting the ring trip with the circuit 6.
COPYRIGHT: (C)1979,JPO&Japio
JP14615377A 1977-12-07 1977-12-07 Subscriber circuit Pending JPS5478912A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14615377A JPS5478912A (en) 1977-12-07 1977-12-07 Subscriber circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14615377A JPS5478912A (en) 1977-12-07 1977-12-07 Subscriber circuit

Publications (1)

Publication Number Publication Date
JPS5478912A true JPS5478912A (en) 1979-06-23

Family

ID=15401324

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14615377A Pending JPS5478912A (en) 1977-12-07 1977-12-07 Subscriber circuit

Country Status (1)

Country Link
JP (1) JPS5478912A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140572U (en) * 1983-03-11 1984-09-19 株式会社東芝 ring trip circuit
JPS6080352A (en) * 1983-10-07 1985-05-08 Nec Corp Circuit for preventing mis-scanning
JPS6157158A (en) * 1984-08-29 1986-03-24 Fujitsu Ltd Ring trip control system
JPS6182563A (en) * 1984-09-29 1986-04-26 Fujitsu Ltd Ring trip device
JPS63127643A (en) * 1986-11-18 1988-05-31 Tamura Electric Works Ltd Telephone exchange

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59140572U (en) * 1983-03-11 1984-09-19 株式会社東芝 ring trip circuit
JPS6080352A (en) * 1983-10-07 1985-05-08 Nec Corp Circuit for preventing mis-scanning
JPS6157158A (en) * 1984-08-29 1986-03-24 Fujitsu Ltd Ring trip control system
JPS6182563A (en) * 1984-09-29 1986-04-26 Fujitsu Ltd Ring trip device
JPS63127643A (en) * 1986-11-18 1988-05-31 Tamura Electric Works Ltd Telephone exchange

Similar Documents

Publication Publication Date Title
US5289530A (en) Method and apparatus for vocally communicating to a caller at a remote telephone station synthesized speech of stored special service information
GB1379805A (en) Telephone substation automatic operating system
US4143243A (en) Telephone system
DE3586748D1 (en) REPROGRAMMABLE CALL DIVERSION DEVICE.
JPS5478912A (en) Subscriber circuit
CA1069607A (en) Time division multiplexed pabx communication switching system
JPS5469905A (en) Answering system for call signal of automatic answering telephone set
JPS56156058A (en) Automatic telephone transfer device
JPS5521660A (en) Selection signal system
JPS55165063A (en) Facsimile communication system
JPS57133745A (en) Telephone set having number display and automatic dial function
US5144652A (en) Device for connecting a subscriber line to a selected internal line
SU965010A2 (en) Device for automatic calling of subscribers
JPS5660156A (en) Originating connection system
JPS6454853A (en) Automatic exchange with incoming rejection service function
JPS5558653A (en) Automatic calling control system
RU1828567C (en) Device for display of number of calling subscriber on telephone set of called subscriber
JPS6472651A (en) Calling system by character dial
JPS5370608A (en) Key telephone unit
JPS5650655A (en) Telephone set
SU1170628A1 (en) Device for quick voice communication
JPS5689162A (en) Number change guide system
SU513525A2 (en) Automatic telephone station alert device
JPS57210760A (en) Telephone exchanger
JPS56128055A (en) Incoming selective terminal equipment