JPS51131203A - Telephone switching system - Google Patents
Telephone switching systemInfo
- Publication number
- JPS51131203A JPS51131203A JP5467975A JP5467975A JPS51131203A JP S51131203 A JPS51131203 A JP S51131203A JP 5467975 A JP5467975 A JP 5467975A JP 5467975 A JP5467975 A JP 5467975A JP S51131203 A JPS51131203 A JP S51131203A
- Authority
- JP
- Japan
- Prior art keywords
- switching system
- telephone switching
- voice signals
- signals
- remodulating
- 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
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Time-Division Multiplex Systems (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
PURPOSE: The switching system incorporating a PCM micro circuit that prevents the telephone exchange quality to be degraded by transmitting voice signals in the form of digital signals and improving the signal-to-noise ratio by delta remodulating voice signals only at the intermediate relay station.
COPYRIGHT: (C)1976,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5467975A JPS5838977B2 (en) | 1975-05-12 | 1975-05-12 | Signal transmission method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5467975A JPS5838977B2 (en) | 1975-05-12 | 1975-05-12 | Signal transmission method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS51131203A true JPS51131203A (en) | 1976-11-15 |
JPS5838977B2 JPS5838977B2 (en) | 1983-08-26 |
Family
ID=12977464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5467975A Expired JPS5838977B2 (en) | 1975-05-12 | 1975-05-12 | Signal transmission method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5838977B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63131629A (en) * | 1986-11-20 | 1988-06-03 | Nec Corp | Disconnecting and connecting system for ordering line |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0463562U (en) * | 1990-10-12 | 1992-05-29 |
-
1975
- 1975-05-12 JP JP5467975A patent/JPS5838977B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63131629A (en) * | 1986-11-20 | 1988-06-03 | Nec Corp | Disconnecting and connecting system for ordering line |
Also Published As
Publication number | Publication date |
---|---|
JPS5838977B2 (en) | 1983-08-26 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS5242324A (en) | Chroma signal processing system | |
JPS5412506A (en) | Time-division exchange conference system | |
JPS51131203A (en) | Telephone switching system | |
JPS53140908A (en) | First ringing control system in time sharing exchanger | |
AU497812B2 (en) | Digital telephone exchange conference circuit | |
JPS526406A (en) | Inter-frame encoding system | |
JPS5217739A (en) | Call request sysem by voice communication | |
JPS5547768A (en) | Facsimile callout system | |
JPS53117922A (en) | Absence reception voice answer skip system | |
JPS54109709A (en) | Verification system | |
JPS54162905A (en) | Radiotelephony equipment | |
JPS52125213A (en) | Absence transfer system | |
JPS51149717A (en) | Solid state smage scanner | |
JPS5413207A (en) | Fascimile reception system | |
JPS52154318A (en) | Terminal connection method in digital data transmission system | |
JPS5224024A (en) | Image communication system | |
JPS52122020A (en) | Calling signal system | |
JPS5255812A (en) | Telautographing equipment | |
JPS5373905A (en) | Radiotelephony control system | |
JPS5384621A (en) | Error resending system of picture signal | |
JPS5210103A (en) | Cantilever | |
JPS5368012A (en) | Click sound preventing system | |
JPS5218157A (en) | Pcm encoder | |
JPS5313338A (en) | Digital delay circuit | |
JPS5399803A (en) | Separating signal system for subscriber's line |