JPS6450697A - Key telephone system - Google Patents
Key telephone systemInfo
- Publication number
- JPS6450697A JPS6450697A JP20637887A JP20637887A JPS6450697A JP S6450697 A JPS6450697 A JP S6450697A JP 20637887 A JP20637887 A JP 20637887A JP 20637887 A JP20637887 A JP 20637887A JP S6450697 A JPS6450697 A JP S6450697A
- Authority
- JP
- Japan
- Prior art keywords
- hooking
- line wire
- telephone set
- line
- transmits
- 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
Landscapes
- Devices For Supply Of Signal Current (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To output a hooking pulse with respect to a supplementary line wire by dialling an access code outputting the hooking pulse with respect to hooking and the line wire when an individual line telephone set is in the middle of call with the line wire. CONSTITUTION:When the hook switch 10 of the individual line telephone set 2 is depressed and hooking operation is executed, an individual line telephone set interface 5 detects a hooking signal, transmits a detection signal to a main control part 4 and transmits an instruction for holding a line wire concerned 3 in a line wire interface 6 to a channel switch 7. When the access code (' ', for example) is dialled by the individual line telephone set 2, the main control part 4 transmits an instruction signal for outputting the line wire hooking pulse to the line wire interface 6, simultaneously transmits the instruction for returning the having held line wire 3 to original call to the channel switch 7, and connects a channel with the individual line telephone set 2 in the middle of operation so as to return a system in a call state.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20637887A JPS6450697A (en) | 1987-08-21 | 1987-08-21 | Key telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20637887A JPS6450697A (en) | 1987-08-21 | 1987-08-21 | Key telephone system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6450697A true JPS6450697A (en) | 1989-02-27 |
Family
ID=16522344
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20637887A Pending JPS6450697A (en) | 1987-08-21 | 1987-08-21 | Key telephone system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6450697A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6132645A (en) * | 1984-07-25 | 1986-02-15 | Hitachi Ltd | Inquiry calling and transfer connection system |
JPS62176291A (en) * | 1986-01-30 | 1987-08-03 | Toshiba Corp | Telephone system |
-
1987
- 1987-08-21 JP JP20637887A patent/JPS6450697A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6132645A (en) * | 1984-07-25 | 1986-02-15 | Hitachi Ltd | Inquiry calling and transfer connection system |
JPS62176291A (en) * | 1986-01-30 | 1987-08-03 | Toshiba Corp | Telephone system |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57196651A (en) | Dial inputting system | |
JPS56771A (en) | Data transmission system | |
JPS6450697A (en) | Key telephone system | |
JPS57212856A (en) | Terminal adaptor system | |
JPS54150006A (en) | Interphone device | |
JPS645149A (en) | Dial terminal equipment for multi-function communication service network | |
JPS57190450A (en) | Privacy system for push-button dial telephone set | |
JPS6472651A (en) | Calling system by character dial | |
JPS6444661A (en) | Method for preventing key input erroneous operation of telephone system for mobile body | |
JPS5690662A (en) | Extension calling system of key telephone set | |
JPS55137758A (en) | Extension telephone set connection switching system | |
JPS5627556A (en) | Call transfer system | |
JPS5689162A (en) | Number change guide system | |
JPS6422193A (en) | Telephone system | |
JPS56122587A (en) | Direct channel control system | |
JPS57196654A (en) | Main trunk transfer system by specific number dialing | |
JPS5617561A (en) | Talking device | |
JPS57170664A (en) | Howler signal transmitting system in time division switchboard | |
JPS561646A (en) | Channel switching system | |
JPS6412738A (en) | Message transmission system | |
JPS6481494A (en) | Pushbutton telephone master device | |
JPS6472692A (en) | Key telephone system | |
JPS6478041A (en) | Radio telephone set | |
JPS57113670A (en) | Telephone set | |
JPS55147865A (en) | Busy indicating circuit of key telephone unit |