GB1432983A - Telephone answering system - Google Patents
Telephone answering systemInfo
- Publication number
- GB1432983A GB1432983A GB2952673A GB2952673A GB1432983A GB 1432983 A GB1432983 A GB 1432983A GB 2952673 A GB2952673 A GB 2952673A GB 2952673 A GB2952673 A GB 2952673A GB 1432983 A GB1432983 A GB 1432983A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector
- zero
- pulse
- june
- hanging
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/66—Substation equipment, e.g. for use by subscribers with means for preventing unauthorised or fraudulent calling
- H04M1/663—Preventing unauthorised calls to a telephone set
- H04M1/665—Preventing unauthorised calls to a telephone set by checking the validity of a code
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Signal Processing (AREA)
- Telephonic Communication Services (AREA)
- Prepayment Telephone Systems (AREA)
Abstract
1432983 Substation equipment J ST CLAIR KILBY 21 June 1973 [26 June 1972] 29526/73 Addition to 1413339 Heading H4K The telephone answering machine disclosed in Specification 1,413,339 in which the owner of the machine is alerted if a caller actuates a detector 56 by transmitting a special signal following reception of an announcement message is modified in that the detector 56 includes a delay circuit (228-234) there being also a zero current sensor 15 which monitors the current in the line and provides an output to the detector so that the latter, during the "answering an incoming call" mode, can distinguish between a dialled pulse (which results in summoning of the called party) and a pulse caused by the caller hanging up. If the line current goes to zero, indicating hanging up, after the detector has received a pulse and remains at zero for the duration of its delay period, the detector is disabled and no intermittent beep tone is generated.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26649072A | 1972-06-26 | 1972-06-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1432983A true GB1432983A (en) | 1976-04-22 |
Family
ID=23014788
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2952673A Expired GB1432983A (en) | 1972-06-26 | 1973-06-21 | Telephone answering system |
Country Status (8)
Country | Link |
---|---|
JP (1) | JPS4952506A (en) |
BE (1) | BE801478A (en) |
CA (1) | CA984983A (en) |
DE (1) | DE2332244C2 (en) |
GB (1) | GB1432983A (en) |
IT (1) | IT986215B (en) |
NL (1) | NL7308862A (en) |
SE (1) | SE382293B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2183125A (en) * | 1985-10-10 | 1987-05-28 | Microcompass Ltd | Improvements to communication apparatus |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5399802A (en) * | 1977-02-14 | 1978-08-31 | Nippon Telegr & Teleph Corp <Ntt> | Specific subscriber calling equipment of automatic answering telephone set |
JPS53132911A (en) * | 1977-04-26 | 1978-11-20 | Iwatsu Electric Co Ltd | Telephone set |
JPS53146511A (en) * | 1977-05-26 | 1978-12-20 | Toyo Communication Equip | Caller identifying telephone set |
JPS5648160U (en) * | 1980-09-04 | 1981-04-28 | ||
DE3405014A1 (en) * | 1984-02-13 | 1985-08-14 | Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt | Method for operating a telephone answering machine |
DE19511622A1 (en) | 1995-03-30 | 1996-10-02 | Michael Wolf | Door answering machine |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1283074A (en) * | 1961-03-08 | 1962-01-27 | Subscriber telephone installation | |
DE1437906B2 (en) * | 1965-04-17 | 1970-03-26 | Blessing, Dipl.-Kfm. Dr. Gerhard, 7336 Uhingen | Circuit arrangement for an additional device at telephone subscriber stations |
JPS4831810A (en) * | 1971-08-30 | 1973-04-26 |
-
1973
- 1973-06-11 CA CA173,733A patent/CA984983A/en not_active Expired
- 1973-06-21 GB GB2952673A patent/GB1432983A/en not_active Expired
- 1973-06-25 SE SE7308899A patent/SE382293B/en unknown
- 1973-06-25 IT IT5102273A patent/IT986215B/en active
- 1973-06-25 DE DE19732332244 patent/DE2332244C2/en not_active Expired
- 1973-06-25 JP JP7160573A patent/JPS4952506A/ja active Pending
- 1973-06-26 BE BE132756A patent/BE801478A/en not_active IP Right Cessation
- 1973-06-26 NL NL7308862A patent/NL7308862A/xx not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2183125A (en) * | 1985-10-10 | 1987-05-28 | Microcompass Ltd | Improvements to communication apparatus |
GB2183125B (en) * | 1985-10-10 | 1989-11-29 | Microcompass Ltd | Improvements to communication apparatus |
Also Published As
Publication number | Publication date |
---|---|
DE2332244A1 (en) | 1974-01-17 |
NL7308862A (en) | 1973-12-28 |
CA984983A (en) | 1976-03-02 |
DE2332244C2 (en) | 1984-04-05 |
BE801478A (en) | 1973-10-15 |
IT986215B (en) | 1975-01-20 |
JPS4952506A (en) | 1974-05-22 |
SE382293B (en) | 1976-01-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed |