JPS4216450B1 - - Google Patents
Info
- Publication number
- JPS4216450B1 JPS4216450B1 JP2453665A JP2453665A JPS4216450B1 JP S4216450 B1 JPS4216450 B1 JP S4216450B1 JP 2453665 A JP2453665 A JP 2453665A JP 2453665 A JP2453665 A JP 2453665A JP S4216450 B1 JPS4216450 B1 JP S4216450B1
- 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
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US363138A US3327065A (en) | 1964-04-28 | 1964-04-28 | Busy verification circuit for private branch exchanges |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4216450B1 true JPS4216450B1 (ja) | 1967-09-05 |
Family
ID=23428980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2453665A Pending JPS4216450B1 (ja) | 1964-04-28 | 1965-04-27 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US3327065A (ja) |
| JP (1) | JPS4216450B1 (ja) |
| BE (1) | BE663164A (ja) |
| DE (1) | DE1259401B (ja) |
| FR (1) | FR1441611A (ja) |
| GB (1) | GB1099697A (ja) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3410960A (en) * | 1965-03-09 | 1968-11-12 | Bell Telephone Labor Inc | No-test or busy verification in a private branch exchange telephone system |
| US3435150A (en) * | 1965-12-03 | 1969-03-25 | Bell Telephone Labor Inc | Private branch exchange system having data transmission lines and means for preventing application of tones thereto |
| US3482055A (en) * | 1966-05-02 | 1969-12-02 | Itt | Executive override |
| US3509285A (en) * | 1966-12-20 | 1970-04-28 | Bell Telephone Labor Inc | No-test trunk circuit for private branch exchanges |
| GB1218344A (en) * | 1967-01-12 | 1971-01-06 | Gen Electric Co Ltd | Improvements in or relating to private telephone exchanges |
-
1964
- 1964-04-28 US US363138A patent/US3327065A/en not_active Expired - Lifetime
-
1965
- 1965-04-23 FR FR14510A patent/FR1441611A/fr not_active Expired
- 1965-04-27 JP JP2453665A patent/JPS4216450B1/ja active Pending
- 1965-04-27 GB GB17652/65A patent/GB1099697A/en not_active Expired
- 1965-04-28 BE BE663164D patent/BE663164A/xx not_active IP Right Cessation
- 1965-04-28 DE DEW39060A patent/DE1259401B/de active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1099697A (en) | 1968-01-17 |
| US3327065A (en) | 1967-06-20 |
| DE1259401B (de) | 1968-01-25 |
| BE663164A (ja) | 1965-08-17 |
| FR1441611A (fr) | 1966-06-10 |