JPS57145452A - Branching device - Google Patents

Branching device

Info

Publication number
JPS57145452A
JPS57145452A JP56031554A JP3155481A JPS57145452A JP S57145452 A JPS57145452 A JP S57145452A JP 56031554 A JP56031554 A JP 56031554A JP 3155481 A JP3155481 A JP 3155481A JP S57145452 A JPS57145452 A JP S57145452A
Authority
JP
Japan
Prior art keywords
circuit
signal
branching device
transmission
modulating
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
JP56031554A
Other languages
Japanese (ja)
Inventor
Fumitaka Tagami
Hiroshi Oshima
Masaaki Ishimoto
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP56031554A priority Critical patent/JPS57145452A/en
Publication of JPS57145452A publication Critical patent/JPS57145452A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE:To reduce the effect of the space of installation, the external noise, etc. for a branching device that connects plural terminal devices to a center via a communication circuit, by installing a modulating/demodulating circuit which is used for an interface to the communication circuit at the center side within a branching device. CONSTITUTION:A branching device consists of a main control circuit 7, a channel control circuit 8 and a modulating/demodulating circuit 10. The circuit 7 transmits the transmission request signal to the circuit 10. When the transmission permitting signal is sent back to the circuit 7 from the circuit 10, the circuit 7 selects either one channel based on the prescribed priority and transmits a transmission indicating signal to the circuit 8. The circuit 8 transmits the transmission permitting signal to the channel selected based on the transmission indicating signal to connect the transmitting data circuit of the corresponding channel. The circuit 10 converts the transmitting data into the AC signal to transmit it to a communication circuit 3. The AC signal of the circuit 3 is converted into the DC signal by a modulating/demodulating device 2 of the center side and transmitted to a center 1.
JP56031554A 1981-03-05 1981-03-05 Branching device Pending JPS57145452A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56031554A JPS57145452A (en) 1981-03-05 1981-03-05 Branching device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56031554A JPS57145452A (en) 1981-03-05 1981-03-05 Branching device

Publications (1)

Publication Number Publication Date
JPS57145452A true JPS57145452A (en) 1982-09-08

Family

ID=12334399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56031554A Pending JPS57145452A (en) 1981-03-05 1981-03-05 Branching device

Country Status (1)

Country Link
JP (1) JPS57145452A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000260A1 (en) * 1983-06-23 1985-01-17 Technopark Mine Co., Ltd. Multiplexer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4520253Y1 (en) * 1970-01-09 1970-08-14

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4520253Y1 (en) * 1970-01-09 1970-08-14

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985000260A1 (en) * 1983-06-23 1985-01-17 Technopark Mine Co., Ltd. Multiplexer

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