JPS5228212A - Intra-office information transmission system - Google Patents

Intra-office information transmission system

Info

Publication number
JPS5228212A
JPS5228212A JP50104435A JP10443575A JPS5228212A JP S5228212 A JPS5228212 A JP S5228212A JP 50104435 A JP50104435 A JP 50104435A JP 10443575 A JP10443575 A JP 10443575A JP S5228212 A JPS5228212 A JP S5228212A
Authority
JP
Japan
Prior art keywords
intra
transmission system
office information
information transmission
office
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
JP50104435A
Other languages
Japanese (ja)
Inventor
Masami Miyazaki
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.)
TOUA TOKUSHIYU DENKI KK
Toa Corp
Toa Tokushu Denki KK
Original Assignee
TOUA TOKUSHIYU DENKI KK
Toa Electric Co Ltd
Toa Tokushu Denki KK
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 TOUA TOKUSHIYU DENKI KK, Toa Electric Co Ltd, Toa Tokushu Denki KK filed Critical TOUA TOKUSHIYU DENKI KK
Priority to JP50104435A priority Critical patent/JPS5228212A/en
Priority to US05/703,068 priority patent/US4097694A/en
Publication of JPS5228212A publication Critical patent/JPS5228212A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/02—Telephonic communication systems specially adapted for combination with other electrical systems with bell or annunciator systems
    • H04M11/022—Paging systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)

Abstract

PURPOSE:Facilitation of the demodulation and lowering the receiving error rate by introducing 2 frequency code modulation of the intra-office information.
JP50104435A 1975-07-09 1975-08-27 Intra-office information transmission system Pending JPS5228212A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP50104435A JPS5228212A (en) 1975-08-27 1975-08-27 Intra-office information transmission system
US05/703,068 US4097694A (en) 1975-07-09 1976-07-06 Time-division telephone system embodying trunks having demodulating-adder circuits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP50104435A JPS5228212A (en) 1975-08-27 1975-08-27 Intra-office information transmission system

Publications (1)

Publication Number Publication Date
JPS5228212A true JPS5228212A (en) 1977-03-03

Family

ID=14380576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP50104435A Pending JPS5228212A (en) 1975-07-09 1975-08-27 Intra-office information transmission system

Country Status (1)

Country Link
JP (1) JPS5228212A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5487412A (en) * 1977-12-23 1979-07-11 Mitsubishi Electric Corp Code transferring method
JPS595763A (en) * 1982-07-01 1984-01-12 Hino Denshi Kk Electric power and signal transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5487412A (en) * 1977-12-23 1979-07-11 Mitsubishi Electric Corp Code transferring method
JPS595763A (en) * 1982-07-01 1984-01-12 Hino Denshi Kk Electric power and signal transmission system

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