JPS6413851A - Data transmission system - Google Patents

Data transmission system

Info

Publication number
JPS6413851A
JPS6413851A JP16868587A JP16868587A JPS6413851A JP S6413851 A JPS6413851 A JP S6413851A JP 16868587 A JP16868587 A JP 16868587A JP 16868587 A JP16868587 A JP 16868587A JP S6413851 A JPS6413851 A JP S6413851A
Authority
JP
Japan
Prior art keywords
register
data transmission
signal
frequency
exsisting
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
JP16868587A
Other languages
Japanese (ja)
Inventor
Yoshihisa Saito
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 JP16868587A priority Critical patent/JPS6413851A/en
Publication of JPS6413851A publication Critical patent/JPS6413851A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To execute a data transmission without interfering an exsisting register signal transmitting and receiving by adding one frequency to six frequencies of a frequency in a sound band to constitute the register signal of an R2 system. CONSTITUTION:To the functions of an outgoing register 5 and an incoming register 10, including six frequencies in an R2 system, 2100Hz as a forward signal and 420Hz as a backward signal are added and by the combined signal of this added one frequency and one frequency in exsisting six frequencies, codes 16-21 are expressed. In such a case, the code 19 expresses the starting of a data transmission, the code 20 expresses the request of the next data sending and the code 21 expresses the finishing of the data transmission Thus, data terminal 8 of an outgoing station 2 and a data terminal 13 of an incoming station 3 can execute the data transmission through the outgoing register 5 and the incoming register 10 without interfering the transmitting and receiving of an exsisting signal between stations.
JP16868587A 1987-07-08 1987-07-08 Data transmission system Pending JPS6413851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16868587A JPS6413851A (en) 1987-07-08 1987-07-08 Data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16868587A JPS6413851A (en) 1987-07-08 1987-07-08 Data transmission system

Publications (1)

Publication Number Publication Date
JPS6413851A true JPS6413851A (en) 1989-01-18

Family

ID=15872573

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16868587A Pending JPS6413851A (en) 1987-07-08 1987-07-08 Data transmission system

Country Status (1)

Country Link
JP (1) JPS6413851A (en)

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