JPH0229258B2 - - Google Patents

Info

Publication number
JPH0229258B2
JPH0229258B2 JP56120685A JP12068581A JPH0229258B2 JP H0229258 B2 JPH0229258 B2 JP H0229258B2 JP 56120685 A JP56120685 A JP 56120685A JP 12068581 A JP12068581 A JP 12068581A JP H0229258 B2 JPH0229258 B2 JP H0229258B2
Authority
JP
Japan
Prior art keywords
signal
telephone
start bit
main device
control 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.)
Expired - Lifetime
Application number
JP56120685A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5821953A (ja
Inventor
Akio Doi
Norio Saneyoshi
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.)
Iwatsu Electric Co Ltd
Original Assignee
Iwatsu 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 Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP56120685A priority Critical patent/JPS5821953A/ja
Priority to US06/403,333 priority patent/US4502138A/en
Publication of JPS5821953A publication Critical patent/JPS5821953A/ja
Publication of JPH0229258B2 publication Critical patent/JPH0229258B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/02—Arrangements for interconnection not involving centralised switching involving a common line for all parties
    • H04M9/022—Multiplex systems
    • H04M9/027—Frequency division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/003—Transmission of control signals from or to the key telephone set; signalling equipment at key telephone set, e.g. keyboard or display equipment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
JP56120685A 1981-08-03 1981-08-03 ボタン電話装置における同期方式 Granted JPS5821953A (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP56120685A JPS5821953A (ja) 1981-08-03 1981-08-03 ボタン電話装置における同期方式
US06/403,333 US4502138A (en) 1981-08-03 1982-07-30 Synchronization system for key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56120685A JPS5821953A (ja) 1981-08-03 1981-08-03 ボタン電話装置における同期方式

Publications (2)

Publication Number Publication Date
JPS5821953A JPS5821953A (ja) 1983-02-09
JPH0229258B2 true JPH0229258B2 (en]) 1990-06-28

Family

ID=14792411

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56120685A Granted JPS5821953A (ja) 1981-08-03 1981-08-03 ボタン電話装置における同期方式

Country Status (2)

Country Link
US (1) US4502138A (en])
JP (1) JPS5821953A (en])

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3967532B2 (ja) 2000-08-29 2007-08-29 株式会社東芝 ディジタルボタン電話端末

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2750818C3 (de) * 1977-11-14 1986-02-13 Vdo Adolf Schindling Ag, 6000 Frankfurt Anordnung zur zeitmultiplexen Datenübertragung
JPS55107360A (en) * 1979-02-08 1980-08-18 Matsushita Electric Ind Co Ltd Detector for synchronizing signal
US4394757A (en) * 1981-03-31 1983-07-19 Siemens Corporation Frame format for PCM speech data in a telephone transmission system and digital telephone apparatus for use with this frame format

Also Published As

Publication number Publication date
JPS5821953A (ja) 1983-02-09
US4502138A (en) 1985-02-26

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