IT1167270B - Circuito elettronico di attesa perfezionato - Google Patents
Circuito elettronico di attesa perfezionatoInfo
- Publication number
- IT1167270B IT1167270B IT23867/83A IT2386783A IT1167270B IT 1167270 B IT1167270 B IT 1167270B IT 23867/83 A IT23867/83 A IT 23867/83A IT 2386783 A IT2386783 A IT 2386783A IT 1167270 B IT1167270 B IT 1167270B
- Authority
- IT
- Italy
- Prior art keywords
- perfected
- waiting circuit
- electronic waiting
- electronic
- circuit
- Prior art date
Links
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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/80—Telephone line holding circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/444,759 US4440981A (en) | 1982-11-26 | 1982-11-26 | Electronic hold circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8323867A0 IT8323867A0 (it) | 1983-11-24 |
IT1167270B true IT1167270B (it) | 1987-05-13 |
Family
ID=23766232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT23867/83A IT1167270B (it) | 1982-11-26 | 1983-11-24 | Circuito elettronico di attesa perfezionato |
Country Status (4)
Country | Link |
---|---|
US (1) | US4440981A (it) |
BE (1) | BE898305A (it) |
CA (1) | CA1205230A (it) |
IT (1) | IT1167270B (it) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4529843A (en) * | 1983-08-25 | 1985-07-16 | Gte Business Communication Systems Inc. | Subscribers telephone hold circuit with automatic disconnect |
US4674118A (en) * | 1985-03-25 | 1987-06-16 | Tie/Communications, Inc. | Telephone line hold and hold release apparatus |
US4742539A (en) * | 1985-07-05 | 1988-05-03 | Melita Electronic Labs, Inc. | Telephone loop current modulator |
US4648109A (en) * | 1985-12-16 | 1987-03-03 | Gte Communication Systems Corp. | Light emitting diode message waiting lamp circuit |
US5285495A (en) * | 1991-08-27 | 1994-02-08 | Winbond Electronic Corp. | Push-button telephone dialing device with telephone hold function circuit |
US6157713A (en) * | 1996-04-10 | 2000-12-05 | Industrial Technology Research Institute | Telephone hold circuit |
US9071945B1 (en) * | 2007-09-17 | 2015-06-30 | Google Inc. | Caller feedback in mobile devices |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4001520A (en) * | 1975-02-20 | 1977-01-04 | Waldman Herbert H | Hold circuit for telephones |
US4011413A (en) * | 1976-01-12 | 1977-03-08 | Gimix, Inc. | Hold circuit for telephone |
US4093829A (en) * | 1977-03-14 | 1978-06-06 | Silberman Robert L | Single line telephone hold circuit |
US4258232A (en) * | 1978-11-06 | 1981-03-24 | Tone Commander Systems, Inc. | Line hold circuits |
US4365117A (en) * | 1980-08-07 | 1982-12-21 | Curtis William A | Telephone hold circuit |
US4394543A (en) * | 1981-06-04 | 1983-07-19 | Lear Siegler, Inc. | Telephone line holding circuit |
US4387274A (en) * | 1981-06-15 | 1983-06-07 | Gti Corporation | Hook flash signal actuated telephone control device |
US4394544A (en) * | 1981-11-09 | 1983-07-19 | Gte Automatic Electric Labs Inc. | Line circuit for multiple line telephone |
-
1982
- 1982-11-26 US US06/444,759 patent/US4440981A/en not_active Expired - Fee Related
-
1983
- 1983-10-28 CA CA000439992A patent/CA1205230A/en not_active Expired
- 1983-11-24 IT IT23867/83A patent/IT1167270B/it active
- 1983-11-25 BE BE2/60267A patent/BE898305A/fr not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US4440981A (en) | 1984-04-03 |
CA1205230A (en) | 1986-05-27 |
IT8323867A0 (it) | 1983-11-24 |
BE898305A (fr) | 1984-03-16 |
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