JPS6482794A - Digital key telephone set - Google Patents
Digital key telephone setInfo
- Publication number
- JPS6482794A JPS6482794A JP24004187A JP24004187A JPS6482794A JP S6482794 A JPS6482794 A JP S6482794A JP 24004187 A JP24004187 A JP 24004187A JP 24004187 A JP24004187 A JP 24004187A JP S6482794 A JPS6482794 A JP S6482794A
- Authority
- JP
- Japan
- Prior art keywords
- key telephone
- multiplexing
- main device
- demultiplexing
- data
- 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
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To save wiring from a main device to a key telephone set by providing the main device with a control data demultiplexing and multiplexing part and the key telephone set with a data demultiplexing and multiplexing part, and multiplexing and transmitting control data and PCM speech data corresponding to two key telephone sets through one communication path from the main device to the key telephone sets. CONSTITUTION:The main device 1 is equipped with control data demultiplexing and multiplexing part (CDMX) 7 and 8 and a key telephone set T1 is equipped with a data demultiplexing and multiplexing part (DMX) 10. Then when PCM speech data is sent from the main device 1 to the key telephone sets T1 and T2, PCM speech data from a PCM signal demultiplexing/multiplexing and speed conversion part (TDSW) 3 is demultiplexed by a PCM signal demultiplexing/ multiplexing and speed conversion part (PCMCV) 6 into PCM speech data for two key telephone sets T1 and T2 and control data for the two key telephone sets T1 and T2 from a main control part (CTL) 2 are sent by the CDMX 7 through a telephone set interface part control part (IFCL) 5 additionally to the PCM speech data for the two sets. Consequently, the wiring from the main device to the key telephone sets is reduced.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24004187A JPS6482794A (en) | 1987-09-24 | 1987-09-24 | Digital key telephone set |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24004187A JPS6482794A (en) | 1987-09-24 | 1987-09-24 | Digital key telephone set |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6482794A true JPS6482794A (en) | 1989-03-28 |
Family
ID=17053592
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24004187A Pending JPS6482794A (en) | 1987-09-24 | 1987-09-24 | Digital key telephone set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6482794A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0503412A2 (en) * | 1991-03-09 | 1992-09-16 | Neumann Elektronik GmbH | Key-controlled multi-line telephone system for alternate, simultaneous or loud-speaking and communication |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5728494A (en) * | 1980-07-28 | 1982-02-16 | Oki Electric Ind Co Ltd | Private branch of exchange system |
JPS5974795A (en) * | 1982-10-21 | 1984-04-27 | Taiko Denki Seisakusho:Kk | Digital key telephone device |
-
1987
- 1987-09-24 JP JP24004187A patent/JPS6482794A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5728494A (en) * | 1980-07-28 | 1982-02-16 | Oki Electric Ind Co Ltd | Private branch of exchange system |
JPS5974795A (en) * | 1982-10-21 | 1984-04-27 | Taiko Denki Seisakusho:Kk | Digital key telephone device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0503412A2 (en) * | 1991-03-09 | 1992-09-16 | Neumann Elektronik GmbH | Key-controlled multi-line telephone system for alternate, simultaneous or loud-speaking and communication |
EP0503412A3 (en) * | 1991-03-09 | 1995-07-19 | Fraunhofer Ges Forschung | Key-controlled multi-line telephone system for alternate, simultaneous or loud-speaking and communication |
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