JPS5477040A - Data transmitter - Google Patents

Data transmitter

Info

Publication number
JPS5477040A
JPS5477040A JP14387177A JP14387177A JPS5477040A JP S5477040 A JPS5477040 A JP S5477040A JP 14387177 A JP14387177 A JP 14387177A JP 14387177 A JP14387177 A JP 14387177A JP S5477040 A JPS5477040 A JP S5477040A
Authority
JP
Japan
Prior art keywords
answer
reception
code
transmission
detects
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
JP14387177A
Other languages
Japanese (ja)
Inventor
Kunio Suzuki
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP14387177A priority Critical patent/JPS5477040A/en
Publication of JPS5477040A publication Critical patent/JPS5477040A/en
Pending legal-status Critical Current

Links

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  • Small-Scale Networks (AREA)
  • Communication Control (AREA)

Abstract

PURPOSE: To improve reliability by adding the procedure of making a reception answer temporarily before the transmission and reception of data to transmission procedures on the answerback system.
CONSTITUTION: If reception answer detector 13 detects a reception answer-back signal in an answer waiting mode while transmitter 1 at the center side is receiving an output command from CPU3, ST control circuit 18 sends data from transmission memory 29 via gate 26 and also sends its check code from check-code generator 21 via gate 25. As a result, its mode changes into the end waiting one of supervising the reception data of the transmitter at the terminal side. Once detector 14 detects the end code, CE control part 27 is informed of the end. When detector 13 detects the answer-back signal indicating the continuation of the operation, code generator 20 sends out the transmission request code and the mode changes into the end waiting one again.
COPYRIGHT: (C)1979,JPO&Japio
JP14387177A 1977-12-02 1977-12-02 Data transmitter Pending JPS5477040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14387177A JPS5477040A (en) 1977-12-02 1977-12-02 Data transmitter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14387177A JPS5477040A (en) 1977-12-02 1977-12-02 Data transmitter

Publications (1)

Publication Number Publication Date
JPS5477040A true JPS5477040A (en) 1979-06-20

Family

ID=15348927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14387177A Pending JPS5477040A (en) 1977-12-02 1977-12-02 Data transmitter

Country Status (1)

Country Link
JP (1) JPS5477040A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5646351A (en) * 1979-09-21 1981-04-27 Ricoh Co Ltd Serial interface device
JPS5759233A (en) * 1980-09-29 1982-04-09 Hitachi Ltd Signal transmitting circuit
JPS5834651A (en) * 1981-08-24 1983-03-01 Nec Corp Communication control system of terminal equipment
JPS60198942A (en) * 1984-03-22 1985-10-08 Nec Corp Remote magnetic tape control system
JPS61278956A (en) * 1985-06-04 1986-12-09 Yokogawa Hewlett Packard Ltd Serial bus system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5646351A (en) * 1979-09-21 1981-04-27 Ricoh Co Ltd Serial interface device
JPS5759233A (en) * 1980-09-29 1982-04-09 Hitachi Ltd Signal transmitting circuit
JPS5834651A (en) * 1981-08-24 1983-03-01 Nec Corp Communication control system of terminal equipment
JPS60198942A (en) * 1984-03-22 1985-10-08 Nec Corp Remote magnetic tape control system
JPS61278956A (en) * 1985-06-04 1986-12-09 Yokogawa Hewlett Packard Ltd Serial bus system

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