JPS4956513A - - Google Patents
Info
- Publication number
- JPS4956513A JPS4956513A JP48048600A JP4860073A JPS4956513A JP S4956513 A JPS4956513 A JP S4956513A JP 48048600 A JP48048600 A JP 48048600A JP 4860073 A JP4860073 A JP 4860073A JP S4956513 A JPS4956513 A JP S4956513A
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
- H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
- H04Q3/625—Arrangements in the private branch exchange
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Exchange Systems With Centralized Control (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
- Interface Circuits In Exchanges (AREA)
- Telephonic Communication Services (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US24979972A | 1972-05-03 | 1972-05-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4956513A true JPS4956513A (en:Method) | 1974-06-01 |
| JPS5333207B2 JPS5333207B2 (en:Method) | 1978-09-13 |
Family
ID=22945045
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4860073A Expired JPS5333207B2 (en:Method) | 1972-05-03 | 1973-05-02 |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US3746797A (en:Method) |
| JP (1) | JPS5333207B2 (en:Method) |
| BE (1) | BE798984A (en:Method) |
| CA (1) | CA998150A (en:Method) |
| DE (1) | DE2321947A1 (en:Method) |
| ES (1) | ES414271A1 (en:Method) |
| FR (1) | FR2183172B1 (en:Method) |
| GB (1) | GB1426919A (en:Method) |
| IT (1) | IT986281B (en:Method) |
| SE (1) | SE395997B (en:Method) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4039758A (en) * | 1973-05-22 | 1977-08-02 | Hitachi, Ltd. | Line identifying system of common control type automatic exchange |
| JPS5068004A (en:Method) * | 1973-10-16 | 1975-06-07 | ||
| US3903374A (en) * | 1974-01-09 | 1975-09-02 | Stromberg Carlson Corp | Control system for electronic PABX switching matrix |
| US3967073A (en) * | 1975-01-09 | 1976-06-29 | Bell Telephone Laboratories, Incorporated | PBX automatic number identification system |
| US4286118A (en) * | 1979-07-02 | 1981-08-25 | Solid State Systems, Inc. | Data distribution system for private automatic branch exchange |
| ZA838877B (en) * | 1982-12-02 | 1984-09-26 | Gen Electric | Telecommunication exchanges |
| JPS6253061A (ja) * | 1985-09-02 | 1987-03-07 | Nec Corp | 不正アクセス防止方法 |
-
1972
- 1972-05-03 US US00249799A patent/US3746797A/en not_active Expired - Lifetime
- 1972-12-14 CA CA158,830A patent/CA998150A/en not_active Expired
-
1973
- 1973-04-24 SE SE7305736A patent/SE395997B/xx unknown
- 1973-05-01 GB GB2060273A patent/GB1426919A/en not_active Expired
- 1973-05-02 ES ES0414271A patent/ES414271A1/es not_active Expired
- 1973-05-02 IT IT68224/73A patent/IT986281B/it active
- 1973-05-02 JP JP4860073A patent/JPS5333207B2/ja not_active Expired
- 1973-05-02 DE DE2321947A patent/DE2321947A1/de active Pending
- 1973-05-02 BE BE130646A patent/BE798984A/xx unknown
- 1973-05-02 FR FR7315739A patent/FR2183172B1/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5333207B2 (en:Method) | 1978-09-13 |
| US3746797A (en) | 1973-07-17 |
| FR2183172A1 (en:Method) | 1973-12-14 |
| CA998150A (en) | 1976-10-05 |
| BE798984A (fr) | 1973-08-31 |
| SE395997B (sv) | 1977-08-29 |
| IT986281B (it) | 1975-01-20 |
| ES414271A1 (es) | 1976-05-01 |
| FR2183172B1 (en:Method) | 1982-07-02 |
| GB1426919A (en) | 1976-03-03 |
| DE2321947A1 (de) | 1973-11-15 |