JPS5325761B2 - - Google Patents
Info
- Publication number
- JPS5325761B2 JPS5325761B2 JP3902474A JP3902474A JPS5325761B2 JP S5325761 B2 JPS5325761 B2 JP S5325761B2 JP 3902474 A JP3902474 A JP 3902474A JP 3902474 A JP3902474 A JP 3902474A JP S5325761 B2 JPS5325761 B2 JP S5325761B2
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M9/00—Arrangements for interconnection not involving centralised switching
- H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US348279A US3920902A (en) | 1973-04-05 | 1973-04-05 | Off-premises station line circuit for a key telephone system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5012906A JPS5012906A (ja) | 1975-02-10 |
| JPS5325761B2 true JPS5325761B2 (ja) | 1978-07-28 |
Family
ID=23367344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3902474A Expired JPS5325761B2 (ja) | 1973-04-05 | 1974-04-05 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US3920902A (ja) |
| JP (1) | JPS5325761B2 (ja) |
| CA (1) | CA994485A (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114197U (ja) * | 1982-01-28 | 1983-08-04 | 松下電器産業株式会社 | バスユニツト |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4185173A (en) * | 1976-10-01 | 1980-01-22 | Nippon Tsu Shin Kogyo K.K. | Key telephone call signalling circuit |
| JPS5412011A (en) * | 1977-06-30 | 1979-01-29 | Nissan Motor Co Ltd | Intake-air amount detecting apparatus for internal combustion engine |
| CA1200036A (en) * | 1978-03-13 | 1986-01-28 | Guido Panizzon | Partyline subscriber interface circuit |
| US4220827A (en) * | 1979-02-21 | 1980-09-02 | Bell Telephone Laboratories, Incorporated | Telephone signaling circuit |
| US4216356A (en) * | 1979-02-21 | 1980-08-05 | Bell Telephone Laboratories, Incorporated | Telephone having separate voice and signaling pairs |
| US4572928A (en) * | 1982-11-09 | 1986-02-25 | Tamura Electric Works, Ltd. | Key telephone system |
| US6229885B1 (en) | 1997-10-10 | 2001-05-08 | At&T Wireless Svcs. Inc. | Method for providing remote emulation of the functionality of a private exchange |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2458262A (en) * | 1946-01-30 | 1949-01-04 | Automatic Elect Lab | Relay selector circuit arranged to simultaneously test a selected group of trunks |
| BE486836A (ja) * | 1948-01-16 | |||
| US2814675A (en) * | 1956-02-13 | 1957-11-26 | Frank R Mallalieu | Intercommunicating telephone equipment |
| US3535461A (en) * | 1967-12-15 | 1970-10-20 | Stromberg Carlson Corp | Busy detector circuit for step-by-step telephone exchange |
| US3521004A (en) * | 1968-07-05 | 1970-07-21 | Northern Electric Co | Self-steering switching system |
| US3604857A (en) * | 1969-07-25 | 1971-09-14 | Bell Telephone Labor Inc | Line-oriented key telephone system |
| US3665112A (en) * | 1969-08-25 | 1972-05-23 | North Electric Co | Multi-line telephone set with switching capability |
| US3701855A (en) * | 1971-01-18 | 1972-10-31 | Bell Telephone Labor Inc | First idle line pickup service |
-
1973
- 1973-04-05 US US348279A patent/US3920902A/en not_active Expired - Lifetime
- 1973-11-26 CA CA186,721A patent/CA994485A/en not_active Expired
-
1974
- 1974-04-05 JP JP3902474A patent/JPS5325761B2/ja not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114197U (ja) * | 1982-01-28 | 1983-08-04 | 松下電器産業株式会社 | バスユニツト |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5012906A (ja) | 1975-02-10 |
| US3920902A (en) | 1975-11-18 |
| CA994485A (en) | 1976-08-03 |