JPS56119539A - Four-wire transmission system - Google Patents
Four-wire transmission systemInfo
- Publication number
- JPS56119539A JPS56119539A JP2247580A JP2247580A JPS56119539A JP S56119539 A JPS56119539 A JP S56119539A JP 2247580 A JP2247580 A JP 2247580A JP 2247580 A JP2247580 A JP 2247580A JP S56119539 A JPS56119539 A JP S56119539A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- crosstalk
- telephone
- telephone signal
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/02—Details
- H04B3/32—Reducing cross-talk, e.g. by compensating
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
PURPOSE:To reduce the influence of crosstalk to make wide-band transmission possible, by arranging frequencies so that frequency bands of the up transmission signal and the down transmission signal do not overlap each other, in the four-wire transmission system using the balance cable. CONSTITUTION:In case that the telephone signal and the commercial television signal are transmitted simultaneously, down telephone signal 1 is arranged in the frequency band between up telephone signal 1 and commercial television signal 2. When crosstalk is generated on the down transmission line by up telephone signal 1, crosstalk has no influence upon the transmission signal because the transmission signal exists in up idle band 3 corresponding to down telephone signal 1.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2247580A JPS56119539A (en) | 1980-02-25 | 1980-02-25 | Four-wire transmission system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2247580A JPS56119539A (en) | 1980-02-25 | 1980-02-25 | Four-wire transmission system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56119539A true JPS56119539A (en) | 1981-09-19 |
Family
ID=12083738
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2247580A Pending JPS56119539A (en) | 1980-02-25 | 1980-02-25 | Four-wire transmission system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56119539A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6376629A (en) * | 1986-09-19 | 1988-04-06 | Hitachi Zosen Corp | Signal transmitting method for towing type responder |
US6802362B2 (en) | 2002-02-21 | 2004-10-12 | Thermal Corp. | Fin with elongated hole and heat pipe with elongated cross section |
-
1980
- 1980-02-25 JP JP2247580A patent/JPS56119539A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6376629A (en) * | 1986-09-19 | 1988-04-06 | Hitachi Zosen Corp | Signal transmitting method for towing type responder |
US6802362B2 (en) | 2002-02-21 | 2004-10-12 | Thermal Corp. | Fin with elongated hole and heat pipe with elongated cross section |
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