JPS5897950A - リングトリツプ方式 - Google Patents

リングトリツプ方式

Info

Publication number
JPS5897950A
JPS5897950A JP19707481A JP19707481A JPS5897950A JP S5897950 A JPS5897950 A JP S5897950A JP 19707481 A JP19707481 A JP 19707481A JP 19707481 A JP19707481 A JP 19707481A JP S5897950 A JPS5897950 A JP S5897950A
Authority
JP
Japan
Prior art keywords
output
circuit
current
call signal
gate
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.)
Granted
Application number
JP19707481A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0241942B2 (enrdf_load_stackoverflow
Inventor
Haruyuki Yoshino
吉野　春幸
Kenzo Hasegawa
長谷川　賢造
Kazuo Hamasato
和雄 浜里
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP19707481A priority Critical patent/JPS5897950A/ja
Publication of JPS5897950A publication Critical patent/JPS5897950A/ja
Publication of JPH0241942B2 publication Critical patent/JPH0241942B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
JP19707481A 1981-12-08 1981-12-08 リングトリツプ方式 Granted JPS5897950A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19707481A JPS5897950A (ja) 1981-12-08 1981-12-08 リングトリツプ方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19707481A JPS5897950A (ja) 1981-12-08 1981-12-08 リングトリツプ方式

Publications (2)

Publication Number Publication Date
JPS5897950A true JPS5897950A (ja) 1983-06-10
JPH0241942B2 JPH0241942B2 (enrdf_load_stackoverflow) 1990-09-20

Family

ID=16368278

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19707481A Granted JPS5897950A (ja) 1981-12-08 1981-12-08 リングトリツプ方式

Country Status (1)

Country Link
JP (1) JPS5897950A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734712A (en) * 1994-01-21 1998-03-31 Telefonaktiebolaget Lm Ericsson Method for off-hook detection during ringing and the use of a subscriber line interface circuit for off-hook detection during ringing

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5394110A (en) * 1977-01-28 1978-08-17 Hitachi Ltd Detection system for direct current piling

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5394110A (en) * 1977-01-28 1978-08-17 Hitachi Ltd Detection system for direct current piling

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5734712A (en) * 1994-01-21 1998-03-31 Telefonaktiebolaget Lm Ericsson Method for off-hook detection during ringing and the use of a subscriber line interface circuit for off-hook detection during ringing

Also Published As

Publication number Publication date
JPH0241942B2 (enrdf_load_stackoverflow) 1990-09-20

Similar Documents

Publication Publication Date Title
US4146754A (en) Telephone signalling method and apparatus
US3194886A (en) Hall effect receiver for mark and space coded signals
JPS58114561A (ja) 通信方式
US3812296A (en) Apparatus for generating and transmitting digital information
US2436809A (en) Electric combination lock
US4147895A (en) Expandable memory for the suppression of phase jitter in a telecommunication system
JPS5897950A (ja) リングトリツプ方式
US4362908A (en) Circuit arrangement for emitting ringing signals in a telephone system
CA1194627A (en) Electronic circuit for detecting the lifting of a telephone handset in presence of ringing current
USRE25139E (en) faulkner
JPS62199189A (ja) 電子会議システム
US3160821A (en) Synchronizing system for pulse sources
US4771451A (en) Polarity ring director
US1225943A (en) Switchboard cord-circuits for fire-alarm telephone systems.
US659544A (en) Telegraph system.
US400264A (en) Automatic grounding device
US281450A (en) Individual signaling apparatus for telephones
US3702472A (en) Pulse generator and encoder
SU1111213A1 (ru) Реле времени
US763971A (en) Ringer system for telephone-exchanges.
US593819A (en) smith
DE2357294B2 (de) Verfahren und Schaltungsanordnung zur Erkennung der Schließung einer Gleichstrom gespeisten Teilnehmerschleife in Fernmelde-, insbesondere Fernsprechanlagen
JPS62230147A (ja) リングトリツプ回路
JPS5858826A (ja) 直流安定化電源の異常時シ−ケンス回路
US3582577A (en) Tone failure detectors