JPS6464492A - Digital key telephone system - Google Patents
Digital key telephone systemInfo
- Publication number
- JPS6464492A JPS6464492A JP22127487A JP22127487A JPS6464492A JP S6464492 A JPS6464492 A JP S6464492A JP 22127487 A JP22127487 A JP 22127487A JP 22127487 A JP22127487 A JP 22127487A JP S6464492 A JPS6464492 A JP S6464492A
- Authority
- JP
- Japan
- Prior art keywords
- highways
- systems
- control data
- voice
- main
- 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.)
- Granted
Links
Landscapes
- Small-Scale Networks (AREA)
- Sub-Exchange Stations And Push- Button Telephones (AREA)
Abstract
PURPOSE:To easily realize the inter-system communication of a non telephone system terminal without using a modulator/demodulator, by transmitting/ receiving a voice and control data between the system through a digital interface circuit. CONSTITUTION:Highways 3, 4 between the systems are connected to a connecting interface unit 14 between the systems of the master main equipment 1 of a digital key telephone system and the connecting interface unit 24 between the systems of the plural slave main devices 2a, 2b-2g are connected to the highways 3, 4. To the respective units 14, 24, speech highways 11, 21 and data highways 12, 22 are connected to transmit/receive the voice and the control data between the systems. Then, the unit 14 of the main equipment 1 designates the addresses of the main equipments 2a, 2b-2g to transmit the control data and the voice data. The unit 24 of the main equipments 2a, 2b-2g receives the control data and the voice data only when the address of its own equipment is designated by the main equipment 1.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62221274A JP2654024B2 (en) | 1987-09-04 | 1987-09-04 | Digital key telephone equipment |
US07/230,799 US4887264A (en) | 1987-09-04 | 1988-08-10 | Digital key telephone system |
CA000574298A CA1296413C (en) | 1987-09-04 | 1988-08-10 | Digital key telephone system |
KR1019880011374A KR910005471B1 (en) | 1987-09-04 | 1988-09-03 | Digital key telephone system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62221274A JP2654024B2 (en) | 1987-09-04 | 1987-09-04 | Digital key telephone equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6464492A true JPS6464492A (en) | 1989-03-10 |
JP2654024B2 JP2654024B2 (en) | 1997-09-17 |
Family
ID=16764206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62221274A Expired - Fee Related JP2654024B2 (en) | 1987-09-04 | 1987-09-04 | Digital key telephone equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2654024B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5687970A (en) * | 1979-12-18 | 1981-07-17 | Nippon Telegr & Teleph Corp <Ntt> | Digital button telephone system |
JPS62122354A (en) * | 1985-11-21 | 1987-06-03 | Iwatsu Electric Co Ltd | Method and equipment for data transmission |
-
1987
- 1987-09-04 JP JP62221274A patent/JP2654024B2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5687970A (en) * | 1979-12-18 | 1981-07-17 | Nippon Telegr & Teleph Corp <Ntt> | Digital button telephone system |
JPS62122354A (en) * | 1985-11-21 | 1987-06-03 | Iwatsu Electric Co Ltd | Method and equipment for data transmission |
Also Published As
Publication number | Publication date |
---|---|
JP2654024B2 (en) | 1997-09-17 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |