JPS6444647A - Data transmission equipment - Google Patents

Data transmission equipment

Info

Publication number
JPS6444647A
JPS6444647A JP62200868A JP20086887A JPS6444647A JP S6444647 A JPS6444647 A JP S6444647A JP 62200868 A JP62200868 A JP 62200868A JP 20086887 A JP20086887 A JP 20086887A JP S6444647 A JPS6444647 A JP S6444647A
Authority
JP
Japan
Prior art keywords
control signal
demodulator
reception
state
input
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
JP62200868A
Other languages
Japanese (ja)
Inventor
Tateo Kamiya
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP62200868A priority Critical patent/JPS6444647A/en
Publication of JPS6444647A publication Critical patent/JPS6444647A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To switch the operation from a reception-side demodulator to a transmission-side modulator without abnormally interrupting the reception operation by inhibiting input of a first control signal to the modulator and the demodulator at the time of input of a second control signal. CONSTITUTION:When a demodulator 2 is operated to set the reception state, a level detector 4 outputs a control signal of logical '0' to a data circuit 7 because detecting the signal sent through a communication line 3. Consequently, a gate is closed. Therefore, the operation state of the demodulator 2 is kept even if a transmission control signal (a) is inputted from a terminal equipment of an information processor in this state. That is, the operation state is switched by input of the transmission control signal (a) only when the demodulator 2 does not receive the signal from the communication line 2 and the level detector 4 outputs the control signal of logical '1' and as the result, abnormal interruption of the reception operation is prevented.
JP62200868A 1987-08-13 1987-08-13 Data transmission equipment Pending JPS6444647A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62200868A JPS6444647A (en) 1987-08-13 1987-08-13 Data transmission equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62200868A JPS6444647A (en) 1987-08-13 1987-08-13 Data transmission equipment

Publications (1)

Publication Number Publication Date
JPS6444647A true JPS6444647A (en) 1989-02-17

Family

ID=16431562

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62200868A Pending JPS6444647A (en) 1987-08-13 1987-08-13 Data transmission equipment

Country Status (1)

Country Link
JP (1) JPS6444647A (en)

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