JPS57148454A - Compound switching system - Google Patents

Compound switching system

Info

Publication number
JPS57148454A
JPS57148454A JP3342781A JP3342781A JPS57148454A JP S57148454 A JPS57148454 A JP S57148454A JP 3342781 A JP3342781 A JP 3342781A JP 3342781 A JP3342781 A JP 3342781A JP S57148454 A JPS57148454 A JP S57148454A
Authority
JP
Japan
Prior art keywords
data
telephone
lines
signal
switchboard
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
JP3342781A
Other languages
Japanese (ja)
Inventor
Noboru Taiko
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3342781A priority Critical patent/JPS57148454A/en
Publication of JPS57148454A publication Critical patent/JPS57148454A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To improve the efficiency of utilization of a circuit by transmitting a telephone number and a data answer signal to two bidirectional lines by frequency division, and a data signal to two directional lines. CONSTITUTION:A compound switchboard 1, data terminals 2 and 3, and telephone sets 4 and 5 are connected together; a data answer signal and a telephone signal are transmitted through two bidirectional lines 8a and 9a by frequency division, and a data is transmitted through the remaining two lines 8b and 9b. Further, a cross-point switch 13 for telephone set switching is provided in the complex switchboard 1 separately from that for data terminal switching, so data communication and telephone communication are performed simultaneously, improving the efficiency of utilization of the circuit.
JP3342781A 1981-03-09 1981-03-09 Compound switching system Pending JPS57148454A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3342781A JPS57148454A (en) 1981-03-09 1981-03-09 Compound switching system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3342781A JPS57148454A (en) 1981-03-09 1981-03-09 Compound switching system

Publications (1)

Publication Number Publication Date
JPS57148454A true JPS57148454A (en) 1982-09-13

Family

ID=12386250

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3342781A Pending JPS57148454A (en) 1981-03-09 1981-03-09 Compound switching system

Country Status (1)

Country Link
JP (1) JPS57148454A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60264138A (en) * 1984-06-01 1985-12-27 ゼロツクス　コーポレーシヨン Local area network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60264138A (en) * 1984-06-01 1985-12-27 ゼロツクス　コーポレーシヨン Local area network

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