JPS479152A - - Google Patents
Info
- Publication number
- JPS479152A JPS479152A JP7759071A JP7759071A JPS479152A JP S479152 A JPS479152 A JP S479152A JP 7759071 A JP7759071 A JP 7759071A JP 7759071 A JP7759071 A JP 7759071A JP S479152 A JPS479152 A JP S479152A
- Authority
- JP
- Japan
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/68—Circuit arrangements for preventing eavesdropping
- H04M1/70—Lock-out or secrecy arrangements in party-line systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US7805370A | 1970-10-05 | 1970-10-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS479152A true JPS479152A (en:Method) | 1972-05-12 |
| JPS5535908B1 JPS5535908B1 (en:Method) | 1980-09-17 |
Family
ID=22141632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7759071A Pending JPS5535908B1 (en:Method) | 1970-10-05 | 1971-10-05 |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US3651274A (en:Method) |
| JP (1) | JPS5535908B1 (en:Method) |
| AU (1) | AU468656B2 (en:Method) |
| CA (1) | CA947851A (en:Method) |
| DE (1) | DE2148869A1 (en:Method) |
| FR (1) | FR2110969A5 (en:Method) |
| GB (1) | GB1352238A (en:Method) |
| IT (1) | IT939927B (en:Method) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3778554A (en) * | 1971-05-24 | 1973-12-11 | Bell Telephone Labor Inc | Single three-wire-port pbx intercom trunk circuit arrangement |
| US4000375A (en) * | 1975-02-20 | 1976-12-28 | Hachishiro Kawamura | Automatic call transfer circuit for a plurality of telephones |
| US4049914A (en) * | 1976-08-30 | 1977-09-20 | Rockwell International Corporation | Frequency division multiplex voice communication apparatus with hierarchy of stations |
| CA1200036A (en) * | 1978-03-13 | 1986-01-28 | Guido Panizzon | Partyline subscriber interface circuit |
| AU535333B2 (en) * | 1979-07-25 | 1984-03-15 | L M Ericsson Pty. Ltd. | Loop sharing in digital systems |
| US4744103A (en) * | 1985-11-27 | 1988-05-10 | Rauland-Borg Corporation | Computer controlled multi-link communication system |
| US5978461A (en) * | 1998-01-20 | 1999-11-02 | Ground Zero Engineering, L.L.C. | Telephone switching system with internal and external channel |
| US7023975B2 (en) * | 2001-08-14 | 2006-04-04 | Sharp Laboratories Of America, Inc. | Privacy mode system and method for home network telephone |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2221655A (en) * | 1936-10-26 | 1940-11-12 | Zwietusch E & Co Gmbh | Party line telephone system |
| US2395798A (en) * | 1942-12-17 | 1946-03-05 | Bell Telephone Labor Inc | Traffic control system |
-
1970
- 1970-10-05 US US78053A patent/US3651274A/en not_active Expired - Lifetime
-
1971
- 1971-05-25 CA CA113,796A patent/CA947851A/en not_active Expired
- 1971-09-22 AU AU33754/71A patent/AU468656B2/en not_active Expired
- 1971-09-30 GB GB4548671A patent/GB1352238A/en not_active Expired
- 1971-09-30 DE DE19712148869 patent/DE2148869A1/de not_active Ceased
- 1971-10-04 IT IT70255/71A patent/IT939927B/it active
- 1971-10-04 FR FR7135695A patent/FR2110969A5/fr not_active Expired
- 1971-10-05 JP JP7759071A patent/JPS5535908B1/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US3651274A (en) | 1972-03-21 |
| AU3375471A (en) | 1973-03-29 |
| GB1352238A (en) | 1974-05-08 |
| FR2110969A5 (en:Method) | 1972-06-02 |
| CA947851A (en) | 1974-05-21 |
| IT939927B (it) | 1973-02-10 |
| DE2148869A1 (de) | 1972-04-06 |
| AU468656B2 (en) | 1976-01-22 |
| JPS5535908B1 (en:Method) | 1980-09-17 |