JPS5830794B2 - コウナイコウカンキ - Google Patents
コウナイコウカンキInfo
- Publication number
- JPS5830794B2 JPS5830794B2 JP48093938A JP9393873A JPS5830794B2 JP S5830794 B2 JPS5830794 B2 JP S5830794B2 JP 48093938 A JP48093938 A JP 48093938A JP 9393873 A JP9393873 A JP 9393873A JP S5830794 B2 JPS5830794 B2 JP S5830794B2
- Authority
- JP
- Japan
- Prior art keywords
- telephone
- circuit
- subscriber line
- pbx
- relay
- 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
- 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
- H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
- H04M9/006—Exchange line circuits
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US28292172A | 1972-08-23 | 1972-08-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4965110A JPS4965110A (US20100223739A1-20100909-C00005.png) | 1974-06-24 |
| JPS5830794B2 true JPS5830794B2 (ja) | 1983-07-01 |
Family
ID=23083695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48093938A Expired JPS5830794B2 (ja) | 1972-08-23 | 1973-08-23 | コウナイコウカンキ |
Country Status (11)
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3991282A (en) * | 1974-12-27 | 1976-11-09 | Feil Thomas E | Multi station telephone switching system |
| US4677662A (en) * | 1984-08-23 | 1987-06-30 | Lott Thomas M | Multiple line self-contained telephone |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239610A (en) * | 1962-12-26 | 1966-03-08 | Bell Telephone Labor Inc | Line circuit for key telephone system |
| US3283083A (en) * | 1963-03-13 | 1966-11-01 | American Telephone & Telegraph | Telephone subscriber's line circuit |
| US3436488A (en) * | 1966-03-17 | 1969-04-01 | Bell Telephone Labor Inc | Line circuit for a key telephone system utilizing a single multifunction supervisory relay |
| US3647983A (en) * | 1969-08-25 | 1972-03-07 | San Bar Electronics Corp | Key system line card circuit |
-
1972
- 1972-08-23 US US00282921A patent/US3795776A/en not_active Expired - Lifetime
-
1973
- 1973-03-01 CA CA164,989A patent/CA984982A/en not_active Expired
- 1973-08-16 SE SE7311197A patent/SE394170B/xx unknown
- 1973-08-17 FR FR7330025A patent/FR2197293B1/fr not_active Expired
- 1973-08-17 NL NL7311384A patent/NL7311384A/xx not_active Application Discontinuation
- 1973-08-17 AU AU59331/73A patent/AU5933173A/en not_active Expired
- 1973-08-18 DE DE2341827A patent/DE2341827C2/de not_active Expired
- 1973-08-21 IT IT69492/73A patent/IT994635B/it active
- 1973-08-21 GB GB3947573A patent/GB1436460A/en not_active Expired
- 1973-08-21 BE BE134778A patent/BE803833A/xx unknown
- 1973-08-23 JP JP48093938A patent/JPS5830794B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS4965110A (US20100223739A1-20100909-C00005.png) | 1974-06-24 |
| IT994635B (it) | 1975-10-20 |
| DE2341827C2 (de) | 1983-06-09 |
| FR2197293B1 (US20100223739A1-20100909-C00005.png) | 1977-09-16 |
| NL7311384A (US20100223739A1-20100909-C00005.png) | 1974-02-26 |
| AU5933173A (en) | 1975-02-20 |
| SE394170B (sv) | 1977-06-06 |
| BE803833A (fr) | 1973-12-17 |
| FR2197293A1 (US20100223739A1-20100909-C00005.png) | 1974-03-22 |
| GB1436460A (en) | 1976-05-19 |
| US3795776A (en) | 1974-03-05 |
| CA984982A (en) | 1976-03-02 |
| DE2341827A1 (de) | 1974-03-07 |
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