JPS57135558A - Digital transmission system for subscriber line - Google Patents
Digital transmission system for subscriber lineInfo
- Publication number
- JPS57135558A JPS57135558A JP2122881A JP2122881A JPS57135558A JP S57135558 A JPS57135558 A JP S57135558A JP 2122881 A JP2122881 A JP 2122881A JP 2122881 A JP2122881 A JP 2122881A JP S57135558 A JPS57135558 A JP S57135558A
- Authority
- JP
- Japan
- Prior art keywords
- bits
- synchronizer
- couple
- digital
- subscriber lines
- 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
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
- H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
- H04L5/1484—Two-way operation using the same type of signal, i.e. duplex using time-sharing operating bytewise
- H04L5/1492—Two-way operation using the same type of signal, i.e. duplex using time-sharing operating bytewise with time compression, e.g. operating according to the ping-pong technique
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
Abstract
PURPOSE:To achieve bilateral communication by a couple of subscriber lines by controlling the time division of subscriber line digital signls and the direction of communication by providing digital synchronizers at both the ends of the couple of subscriber lines. CONSTITUTION:At both the ends of a couple of subscriber lines 20, digital synchronizers 11 and 12 are arranged; one synchronizer 11 is connected to a switchboard, etc., and the other synchronizer 12 is connected to a terminal equipment 13. This synchronizer 11 sends a digital signal 11a with frame bits 14, and data bits 15 and status bits 16 are transmitted synchronizing with the bits 14. This signal 11a is received by the synchronizer 12; the data bits 15 are extracted synchronizing with the bits 14 to be sent to the terminal equipment 13, and data D2 from the terminal equipment 13 is set, synchronizing with the bits 14, as a digital signal 12a. This signal 12a consists of the frame bit 17, data bit 18 and status bit 19 to enable bilateral communication by the couple of subscriber lines 20.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2122881A JPS57135558A (en) | 1981-02-16 | 1981-02-16 | Digital transmission system for subscriber line |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2122881A JPS57135558A (en) | 1981-02-16 | 1981-02-16 | Digital transmission system for subscriber line |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57135558A true JPS57135558A (en) | 1982-08-21 |
Family
ID=12049157
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2122881A Pending JPS57135558A (en) | 1981-02-16 | 1981-02-16 | Digital transmission system for subscriber line |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57135558A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477533A (en) * | 1994-01-13 | 1995-12-19 | Fujitsu Limited | Burst transfer device and burst transfer system |
-
1981
- 1981-02-16 JP JP2122881A patent/JPS57135558A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5477533A (en) * | 1994-01-13 | 1995-12-19 | Fujitsu Limited | Burst transfer device and burst transfer system |
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