JPS5792965A - Data communication device - Google Patents

Data communication device

Info

Publication number
JPS5792965A
JPS5792965A JP55167862A JP16786280A JPS5792965A JP S5792965 A JPS5792965 A JP S5792965A JP 55167862 A JP55167862 A JP 55167862A JP 16786280 A JP16786280 A JP 16786280A JP S5792965 A JPS5792965 A JP S5792965A
Authority
JP
Japan
Prior art keywords
station
ring
back tone
call
communication device
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
JP55167862A
Other languages
Japanese (ja)
Inventor
Toshio Watanabe
Iwao Shimizu
Makoto Suzuki
Toshihiko Nishimura
Shigeru Okamura
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.)
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Mitsubishi Electric Corp
Nippon Kokuyu Tetsudo
Original Assignee
JAPANESE NATIONAL RAILWAYS<JNR>
Japan National Railways
Mitsubishi Electric Corp
Nippon Kokuyu Tetsudo
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 JAPANESE NATIONAL RAILWAYS<JNR>, Japan National Railways, Mitsubishi Electric Corp, Nippon Kokuyu Tetsudo filed Critical JAPANESE NATIONAL RAILWAYS<JNR>
Priority to JP55167862A priority Critical patent/JPS5792965A/en
Publication of JPS5792965A publication Critical patent/JPS5792965A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M11/00Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Abstract

PURPOSE:To report the state of the called subscriber to the calling subscriber, bu providing a ring-back tone transmitting circuit in a communication device, which can call and communicate data through a telephone exchange network, to return the ring-back tone to a subscriber who requests the call. CONSTITUTION:In case of the call request from a station A to a station B, when the calling subscriber connects a telephone set 6a to line by a switch on a network control device 2a to call the station B, a data communication device 12b is connected in AC in the station B by automatic incoming. After incoming, when a data communication request detecting circuit 3 does not detect the request signal, a call request indicator 8 is operated, and simulatneously, a control circuit 13 operates a ring-back tone transmitting circuit 14 to transmit the ring- back tone through a transformer 10. Then, the calling subscriber listens to this ring-back tone to find the station B called; and when the operation of the connection of a telephone set 6b to a line 7b is performed in the station B, the transmission of the ring-back tone is stopped to make the call possible.
JP55167862A 1980-11-28 1980-11-28 Data communication device Pending JPS5792965A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55167862A JPS5792965A (en) 1980-11-28 1980-11-28 Data communication device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55167862A JPS5792965A (en) 1980-11-28 1980-11-28 Data communication device

Publications (1)

Publication Number Publication Date
JPS5792965A true JPS5792965A (en) 1982-06-09

Family

ID=15857457

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55167862A Pending JPS5792965A (en) 1980-11-28 1980-11-28 Data communication device

Country Status (1)

Country Link
JP (1) JPS5792965A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60203059A (en) * 1984-03-14 1985-10-14 Hashimoto Corp Switching connection device of telephone line
JPS6235758A (en) * 1985-08-09 1987-02-16 Canon Inc Data communication equipment
JPH04124090U (en) * 1991-04-23 1992-11-11
JPH09186793A (en) * 1996-10-17 1997-07-15 Hitachi Ltd Line controller
JPH09186794A (en) * 1996-10-17 1997-07-15 Hitachi Ltd Facsimile equipment

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60203059A (en) * 1984-03-14 1985-10-14 Hashimoto Corp Switching connection device of telephone line
JPS6235758A (en) * 1985-08-09 1987-02-16 Canon Inc Data communication equipment
JPH04124090U (en) * 1991-04-23 1992-11-11
JPH09186793A (en) * 1996-10-17 1997-07-15 Hitachi Ltd Line controller
JPH09186794A (en) * 1996-10-17 1997-07-15 Hitachi Ltd Facsimile equipment

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