JPS57135558A - Digital transmission system for subscriber line - Google Patents

Digital transmission system for subscriber line

Info

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
Application number
JP2122881A
Other languages
Japanese (ja)
Inventor
Hiroshi Sekiguchi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP2122881A priority Critical patent/JPS57135558A/en
Publication of JPS57135558A publication Critical patent/JPS57135558A/en
Pending legal-status Critical Current

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.
JP2122881A 1981-02-16 1981-02-16 Digital transmission system for subscriber line Pending JPS57135558A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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