JPS55137758A - Extension telephone set connection switching system - Google Patents
Extension telephone set connection switching systemInfo
- Publication number
- JPS55137758A JPS55137758A JP4574679A JP4574679A JPS55137758A JP S55137758 A JPS55137758 A JP S55137758A JP 4574679 A JP4574679 A JP 4574679A JP 4574679 A JP4574679 A JP 4574679A JP S55137758 A JPS55137758 A JP S55137758A
- Authority
- JP
- Japan
- Prior art keywords
- extension
- telephone set
- connection switching
- iot
- extension telephone
- 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.)
- Pending
Links
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4574679A JPS55137758A (en) | 1979-04-13 | 1979-04-13 | Extension telephone set connection switching system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4574679A JPS55137758A (en) | 1979-04-13 | 1979-04-13 | Extension telephone set connection switching system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55137758A true JPS55137758A (en) | 1980-10-27 |
Family
ID=12727873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4574679A Pending JPS55137758A (en) | 1979-04-13 | 1979-04-13 | Extension telephone set connection switching system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55137758A (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5989063A (ja) * | 1982-11-12 | 1984-05-23 | Nec Corp | 自動交換機の不応答転送方式 |
JPS59154864A (ja) * | 1983-02-24 | 1984-09-03 | Nec Corp | 不応答呼接続処理方式 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119004A (en) * | 1976-03-31 | 1977-10-06 | Hitachi Ltd | Switching system having capability of switching connection during call ing |
-
1979
- 1979-04-13 JP JP4574679A patent/JPS55137758A/ja active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52119004A (en) * | 1976-03-31 | 1977-10-06 | Hitachi Ltd | Switching system having capability of switching connection during call ing |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5989063A (ja) * | 1982-11-12 | 1984-05-23 | Nec Corp | 自動交換機の不応答転送方式 |
JPS59154864A (ja) * | 1983-02-24 | 1984-09-03 | Nec Corp | 不応答呼接続処理方式 |
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