ITMI911748A1 - Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numero di componenti ridotto. - Google Patents
Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numero di componenti ridotto.Info
- Publication number
- ITMI911748A1 ITMI911748A1 IT001748A ITMI911748A ITMI911748A1 IT MI911748 A1 ITMI911748 A1 IT MI911748A1 IT 001748 A IT001748 A IT 001748A IT MI911748 A ITMI911748 A IT MI911748A IT MI911748 A1 ITMI911748 A1 IT MI911748A1
- Authority
- IT
- Italy
- Prior art keywords
- circuit
- line
- detecting
- output
- amplifiers
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
- H04M19/026—Arrangements for interrupting the ringing current
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
- Devices For Supply Of Signal Current (AREA)
- Telephonic Communication Services (AREA)
- Emergency Protection Circuit Devices (AREA)
- Exchange Systems With Centralized Control (AREA)
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI911748A IT1248549B (it) | 1991-06-25 | 1991-06-25 | Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numerodi componenti ridotto. |
DE69217279T DE69217279T2 (de) | 1991-06-25 | 1992-05-11 | Teilnehmerschnittstellenschaltung mit einer Schleifenschlusserkennungsschaltung |
AT92107867T ATE148818T1 (de) | 1991-06-25 | 1992-05-11 | Teilnehmerschnittstellenschaltung mit einer schleifenschlusserkennungsschaltung |
EP92107867A EP0520171B1 (en) | 1991-06-25 | 1992-05-11 | Subscriber line interface circuit with an off-hook detection circuit |
TW081103655A TW199951B (it) | 1991-06-25 | 1992-05-12 | |
CN92103695A CN1030365C (zh) | 1991-06-25 | 1992-05-15 | 带摘机检测电路的电话电路装置 |
CA002068971A CA2068971C (en) | 1991-06-25 | 1992-05-19 | Telephone circuit assembly with hook-off detector circuit |
US07/891,548 US5402484A (en) | 1991-06-25 | 1992-05-29 | Telephone circuit assembly |
JP4140551A JPH05167678A (ja) | 1991-06-25 | 1992-06-01 | 電話の電子加入者リンク回路アセンブリ |
BR929202108A BR9202108A (pt) | 1991-06-25 | 1992-06-02 | Conjunto de circuitos de telefone com circuito detector de desengate |
KR1019920010462A KR100263659B1 (ko) | 1991-06-25 | 1992-06-17 | 후크-오프(hook-off) 검출기회로를 가진 전화기 회로 조립체 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI911748A IT1248549B (it) | 1991-06-25 | 1991-06-25 | Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numerodi componenti ridotto. |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI911748A0 ITMI911748A0 (it) | 1991-06-25 |
ITMI911748A1 true ITMI911748A1 (it) | 1992-12-25 |
IT1248549B IT1248549B (it) | 1995-01-19 |
Family
ID=11360202
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI911748A IT1248549B (it) | 1991-06-25 | 1991-06-25 | Complesso circuitale telefonico ad attacco d'utente elettronico con circuito per la rivelazione dello sgancio in fase di suoneria a numerodi componenti ridotto. |
Country Status (11)
Country | Link |
---|---|
US (1) | US5402484A (it) |
EP (1) | EP0520171B1 (it) |
JP (1) | JPH05167678A (it) |
KR (1) | KR100263659B1 (it) |
CN (1) | CN1030365C (it) |
AT (1) | ATE148818T1 (it) |
BR (1) | BR9202108A (it) |
CA (1) | CA2068971C (it) |
DE (1) | DE69217279T2 (it) |
IT (1) | IT1248549B (it) |
TW (1) | TW199951B (it) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69329859T2 (de) * | 1993-10-29 | 2001-06-07 | St Microelectronics Srl | Fernsprech-Teilnehmerschaltung mit einem galvanischen Trennungselement zur Erzeugung der An/Aus Zustände einer Fernsprechleitung |
US5812658A (en) * | 1995-01-30 | 1998-09-22 | Harris Corp. | Method and circuit for failsafe switch-hook detection during fault in a telephone system |
EP0760576A1 (en) * | 1995-08-30 | 1997-03-05 | Harris Corporation | An Integrated ringer relay circuit and method |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1479094A (en) * | 1975-03-25 | 1977-07-06 | Standard Telephones Cables Ltd | Ring trip detectors |
DE3133934A1 (de) * | 1981-08-27 | 1983-03-17 | Siemens AG, 1000 Berlin und 8000 München | Teilnehmeranschlussschaltung |
US4396805A (en) * | 1981-09-21 | 1983-08-02 | Siemens Corporation | Ring trip detector for a subscriber line interface circuit |
US4473719A (en) * | 1982-05-17 | 1984-09-25 | At&T Bell Laboratories | Switchhook status detector |
US4524245A (en) * | 1983-01-13 | 1985-06-18 | Redcom Laboratories Inc. | Ring trip detection system |
US4866768A (en) * | 1985-06-26 | 1989-09-12 | Siemens Corporate Research & Support, Inc. | Station line interface circuit for a telecommunication network |
JPH0671295B2 (ja) * | 1987-04-06 | 1994-09-07 | 沖電気工業株式会社 | 加入者線給電回路 |
CA1291835C (en) * | 1987-06-19 | 1991-11-05 | Toshiro Tojo | Ring trip circuit for subscriber telephone |
CH675803A5 (en) * | 1988-05-19 | 1990-10-31 | Siemens Ag Albis | Call signal disconnection circuit for telephone network - uses superimposed DC signal fed via amplifier to threshold switch |
FR2631765B1 (fr) * | 1988-05-20 | 1990-08-31 | Dolphin Integration Sa | Circuit d'interface telephonique |
US5189697A (en) * | 1990-04-30 | 1993-02-23 | Northern Telecom Limited | Line interface circuit |
DE4019365A1 (de) * | 1990-06-18 | 1991-12-19 | Philips Patentverwaltung | Schaltungsanordnung fuer ein teilnehmergeraet |
US5133006A (en) * | 1990-10-31 | 1992-07-21 | Seiscor Technologies Inc. | Combination interface circuit for coupling a digital loop carrier telephone system |
JPH05268336A (ja) * | 1992-03-19 | 1993-10-15 | Fujitsu Ltd | リングトリップ回路 |
-
1991
- 1991-06-25 IT ITMI911748A patent/IT1248549B/it active IP Right Grant
-
1992
- 1992-05-11 AT AT92107867T patent/ATE148818T1/de not_active IP Right Cessation
- 1992-05-11 EP EP92107867A patent/EP0520171B1/en not_active Expired - Lifetime
- 1992-05-11 DE DE69217279T patent/DE69217279T2/de not_active Expired - Fee Related
- 1992-05-12 TW TW081103655A patent/TW199951B/zh active
- 1992-05-15 CN CN92103695A patent/CN1030365C/zh not_active Expired - Fee Related
- 1992-05-19 CA CA002068971A patent/CA2068971C/en not_active Expired - Fee Related
- 1992-05-29 US US07/891,548 patent/US5402484A/en not_active Expired - Lifetime
- 1992-06-01 JP JP4140551A patent/JPH05167678A/ja active Pending
- 1992-06-02 BR BR929202108A patent/BR9202108A/pt not_active Application Discontinuation
- 1992-06-17 KR KR1019920010462A patent/KR100263659B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US5402484A (en) | 1995-03-28 |
CN1030365C (zh) | 1995-11-22 |
IT1248549B (it) | 1995-01-19 |
CA2068971C (en) | 2002-01-22 |
DE69217279T2 (de) | 1997-05-28 |
KR100263659B1 (ko) | 2000-08-01 |
CA2068971A1 (en) | 1992-12-26 |
EP0520171A1 (en) | 1992-12-30 |
ITMI911748A0 (it) | 1991-06-25 |
JPH05167678A (ja) | 1993-07-02 |
BR9202108A (pt) | 1993-02-02 |
CN1068229A (zh) | 1993-01-20 |
EP0520171B1 (en) | 1997-02-05 |
TW199951B (it) | 1993-02-11 |
ATE148818T1 (de) | 1997-02-15 |
DE69217279D1 (de) | 1997-03-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19950630 |