IT8324241A0 - Circuito silenziatore per trasmettitore di impianto telefonico d'abbonato. - Google Patents
Circuito silenziatore per trasmettitore di impianto telefonico d'abbonato.Info
- Publication number
- IT8324241A0 IT8324241A0 IT8324241A IT2424183A IT8324241A0 IT 8324241 A0 IT8324241 A0 IT 8324241A0 IT 8324241 A IT8324241 A IT 8324241A IT 2424183 A IT2424183 A IT 2424183A IT 8324241 A0 IT8324241 A0 IT 8324241A0
- Authority
- IT
- Italy
- Prior art keywords
- subscriber
- telephone system
- system transmitter
- silencer circuit
- silencer
- Prior art date
Links
- 230000003584 silencer Effects 0.000 title 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/428—Arrangements for placing incoming calls on hold
- H04M3/4283—Call holding circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Devices For Supply Of Signal Current (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/451,589 US4451706A (en) | 1982-12-20 | 1982-12-20 | Telephone substation transmitter muting circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8324241A0 true IT8324241A0 (it) | 1983-12-19 |
IT1167692B IT1167692B (it) | 1987-05-13 |
Family
ID=23792834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT24241/83A IT1167692B (it) | 1982-12-20 | 1983-12-19 | Circuito silenziatore per trasmettitore di impianto telefonico d'abbonato |
Country Status (4)
Country | Link |
---|---|
US (1) | US4451706A (it) |
BE (1) | BE898489A (it) |
CA (1) | CA1206651A (it) |
IT (1) | IT1167692B (it) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4517414A (en) * | 1983-12-12 | 1985-05-14 | Gte Communication Systems Corp. | Hookswitch bounce resistant telephone hold-mute circuit |
JPH0344222A (ja) * | 1989-07-12 | 1991-02-26 | Toshiba Corp | 無線電話装置 |
US5384842A (en) * | 1990-02-08 | 1995-01-24 | Chesilvale Electronics Limited | Programmable telephone |
US5901212A (en) * | 1997-02-03 | 1999-05-04 | Lucent Technologies Inc. | Apparatus for blocking voice band signals when receiving caller identification information for a waiting call |
GB2342798B (en) * | 1998-10-16 | 2003-04-16 | Mitel Corp | Telephone headset click-free muting circuit |
US6751316B1 (en) * | 1998-12-11 | 2004-06-15 | Mitel Corporation | Click-free muting circuit for headset |
US6931124B1 (en) * | 2000-01-13 | 2005-08-16 | Acoustic Technology, Inc. | Soft mute circuit |
KR20080066705A (ko) * | 2005-09-29 | 2008-07-16 | 더 제너럴 하스피탈 코포레이션 | 점진적으로 증가하는 분해능을 이용하여 하나 이상의 생물학적 샘플을 관찰 및 분석하기 위한 방법 및 장치 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3794774A (en) * | 1973-01-19 | 1974-02-26 | Courtesy Communications Corp | Telephone audio program system |
US4315108A (en) * | 1975-09-29 | 1982-02-09 | Mostek Corporation | Integrated circuit chip telephone communication system |
US4011413A (en) * | 1976-01-12 | 1977-03-08 | Gimix, Inc. | Hold circuit for telephone |
US4087638A (en) * | 1976-10-01 | 1978-05-02 | Telaris Telecommunications Inc. | DTMF Communication system |
DE2915774C2 (de) * | 1979-04-19 | 1983-08-04 | A. Grothe & Söhne KG, 5000 Köln | Fernsprechgerät und/oder Station einer Gegensprechanlage mit einem Handapparat |
US4406926A (en) * | 1980-12-19 | 1983-09-27 | International Telephone And Telegraph Corporation | Telephone station circuit using digital tone generation |
-
1982
- 1982-12-20 US US06/451,589 patent/US4451706A/en not_active Expired - Fee Related
-
1983
- 1983-11-28 CA CA000442053A patent/CA1206651A/en not_active Expired
- 1983-12-19 IT IT24241/83A patent/IT1167692B/it active
- 1983-12-19 BE BE2/60295A patent/BE898489A/fr not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US4451706A (en) | 1984-05-29 |
CA1206651A (en) | 1986-06-24 |
IT1167692B (it) | 1987-05-13 |
BE898489A (fr) | 1984-04-16 |
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