CA2016258A1 - Circuit d'interface pour ligne telephonique - Google Patents

Circuit d'interface pour ligne telephonique

Info

Publication number
CA2016258A1
CA2016258A1 CA2016258A CA2016258A CA2016258A1 CA 2016258 A1 CA2016258 A1 CA 2016258A1 CA 2016258 A CA2016258 A CA 2016258A CA 2016258 A CA2016258 A CA 2016258A CA 2016258 A1 CA2016258 A1 CA 2016258A1
Authority
CA
Canada
Prior art keywords
lines
telephone
telephone lines
circuit
line interface
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
CA2016258A
Other languages
English (en)
Other versions
CA2016258C (fr
Inventor
Masayuki Tsurusaki
Setsuo Kimura
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.)
Toshiba Corp
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Publication of CA2016258A1 publication Critical patent/CA2016258A1/fr
Application granted granted Critical
Publication of CA2016258C publication Critical patent/CA2016258C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/26—Devices for calling a subscriber
    • H04M1/30—Devices which can set up and transmit only one digit at a time
    • H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
    • H04M1/312—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses pulses produced by electronic circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
CA002016258A 1989-05-09 1990-05-08 Circuit d'interface pour ligne telephonique Expired - Fee Related CA2016258C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1115671A JPH02294143A (ja) 1989-05-09 1989-05-09 回線インターフェース回路
JP115671/1989 1989-05-09

Publications (2)

Publication Number Publication Date
CA2016258A1 true CA2016258A1 (fr) 1990-11-09
CA2016258C CA2016258C (fr) 1994-07-12

Family

ID=14668412

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002016258A Expired - Fee Related CA2016258C (fr) 1989-05-09 1990-05-08 Circuit d'interface pour ligne telephonique

Country Status (3)

Country Link
US (1) US5105461A (fr)
JP (1) JPH02294143A (fr)
CA (1) CA2016258C (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0455856U (fr) * 1990-09-17 1992-05-13
US5307406A (en) * 1991-12-18 1994-04-26 International Business Machines Corporation ISDN power source detection circuit
FR2694852A1 (fr) * 1992-08-11 1994-02-18 Swatch Ag Circuit d'interface de communication.
DE4337530A1 (de) * 1993-11-04 1995-05-11 Bergermann Petra Modul für die Anschaltung von Geräten an das öffentliche Telefonnetz
GB9413933D0 (en) * 1994-07-11 1994-08-31 Lau Ee T A telephone interface circuit
US5706342A (en) * 1995-10-27 1998-01-06 Business Link International Method and apparatus for off-hook detection
US5867560A (en) * 1996-05-24 1999-02-02 Rockwell International Corporation Remote hang-up detector
CN1060302C (zh) * 1997-09-02 2001-01-03 智合科技股份有限公司 具有双向接口的拨号装置
US7139391B2 (en) * 2001-10-30 2006-11-21 Integration Associates, Inc. DAA hook switch

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306119A (en) * 1980-07-03 1981-12-15 Bell Telephone Laboratories, Incorporated Telephone outpulsing circuit
US4527016A (en) * 1983-08-25 1985-07-02 Gte Business Communication Systems Inc. Current regulated pulse dialer with memory retention circuit
JPS6062407A (ja) * 1983-09-13 1985-04-10 Ube Ind Ltd 鋼片の切断方法
JPS60153661A (ja) * 1984-01-24 1985-08-13 Iwatsu Electric Co Ltd 加入者線閉結回路
DE3689653T2 (de) * 1985-07-18 1994-07-21 Alcatel Nv Schalter für fernsprecherlinie.
DE3545574A1 (de) * 1985-12-21 1987-07-02 Philips Patentverwaltung Verfahren und schaltungsanordnung zur auswertung der ausgangssignale von stromflussdetektoren in fernmeldeanlagen
JPS639343A (ja) * 1986-06-30 1988-01-16 Tamura Electric Works Ltd 機能電話機
GB2193414B (en) * 1986-07-14 1990-01-04 Siliconix Ltd Telephone instrument
JP2504455B2 (ja) * 1987-03-24 1996-06-05 株式会社東芝 極性反転検出回路
US4935959A (en) * 1989-04-28 1990-06-19 Northern Telecom Limited Two-wire telecommunications line detection arrangements

Also Published As

Publication number Publication date
US5105461A (en) 1992-04-14
CA2016258C (fr) 1994-07-12
JPH02294143A (ja) 1990-12-05

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed