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JPS5450214A - Synchronizing system - Google Patents

Synchronizing system

Info

Publication number
JPS5450214A
JPS5450214A JP11649077A JP11649077A JPS5450214A JP S5450214 A JPS5450214 A JP S5450214A JP 11649077 A JP11649077 A JP 11649077A JP 11649077 A JP11649077 A JP 11649077A JP S5450214 A JPS5450214 A JP S5450214A
Authority
JP
Japan
Prior art keywords
frame synchronization
pulses
error
outputted
reset
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
JP11649077A
Other languages
Japanese (ja)
Inventor
Saburo Inoue
Seiichi Nishino
Kouichi Munakata
Tomoji Onozuka
Kenichi Tonshiyo
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.)
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Oki Electric Industry Co Ltd
NTT Inc
Original Assignee
Fujitsu Ltd
Hitachi Ltd
NEC Corp
Nippon Telegraph and Telephone Corp
Oki Electric Industry Co Ltd
Nippon Electric Co Ltd
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 Fujitsu Ltd, Hitachi Ltd, NEC Corp, Nippon Telegraph and Telephone Corp, Oki Electric Industry Co Ltd, Nippon Electric Co Ltd filed Critical Fujitsu Ltd
Priority to JP11649077A priority Critical patent/JPS5450214A/en
Publication of JPS5450214A publication Critical patent/JPS5450214A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

PURPOSE:To make it possible to receive information without error in PCM transmission by monitoring frame synchronization and multi-frame synchronization independently by a multi-stage counter constitution and synchronizing them with each other. CONSTITUTION:Counters CT-A to CT-G are provided, and CT-A, CT-B, CT-C, CT-D and CT-E count the number of bits in a unit, the number of units, the number of frames, error pulses of FF3 and normal pulses respectively, and fame step- out signal D and frame synchronization establishing signal E are outputted to reset CT-D. Meanwhile, CT-F counts error pulses of FF6 and CT-G counts normal pulses. Then, multi-frame step-out signal F and multi-frame synchronization establishing signal G are outputted to reset CT-F. Thus, frame synchronization and multi-frame synchronization are monitored independently and are synchronized with each other.
JP11649077A 1977-09-28 1977-09-28 Synchronizing system Pending JPS5450214A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11649077A JPS5450214A (en) 1977-09-28 1977-09-28 Synchronizing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11649077A JPS5450214A (en) 1977-09-28 1977-09-28 Synchronizing system

Publications (1)

Publication Number Publication Date
JPS5450214A true JPS5450214A (en) 1979-04-20

Family

ID=14688405

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11649077A Pending JPS5450214A (en) 1977-09-28 1977-09-28 Synchronizing system

Country Status (1)

Country Link
JP (1) JPS5450214A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110373A (en) * 1980-02-05 1981-09-01 Nippon Telegr & Teleph Corp <Ntt> Tone signal detector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56110373A (en) * 1980-02-05 1981-09-01 Nippon Telegr & Teleph Corp <Ntt> Tone signal detector

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