JPS5571381A - Common converter unit - Google Patents

Common converter unit

Info

Publication number
JPS5571381A
JPS5571381A JP14415878A JP14415878A JPS5571381A JP S5571381 A JPS5571381 A JP S5571381A JP 14415878 A JP14415878 A JP 14415878A JP 14415878 A JP14415878 A JP 14415878A JP S5571381 A JPS5571381 A JP S5571381A
Authority
JP
Japan
Prior art keywords
picture
converter
service
call
telephone set
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
JP14415878A
Other languages
Japanese (ja)
Inventor
Hisanori Terajima
Yukihiro Mutsuumaya
Shigeru Mori
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
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone 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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP14415878A priority Critical patent/JPS5571381A/en
Publication of JPS5571381A publication Critical patent/JPS5571381A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to utilize effectively the individual picture line provided in the picture service system, by providing a switch, which switches connection from a TV antenna to a converter, and a call detector as miscellaneous equipments.
CONSTITUTION: When the subscriber of subscriber terminal 11 requests picture service by telephone set 8, call detection circuit 53 drives relay driving circuit 55 to connect the relay contact to the converter 51 side if the output signal of service operation detection circuit 54 is a signal indicating that other subscribers connected to a reverting call converter do not receive service at all. Then, circuit 53 accepts the request and makes it possible that the control signal from telephone set 8 is transmitted to the picture center. Picture signals transmitted from the picture center through picture line 31 are applied to TV receiver 7 of subscriber terminal 11 from converter 51 and are displayed.
COPYRIGHT: (C)1980,JPO&Japio
JP14415878A 1978-11-24 1978-11-24 Common converter unit Pending JPS5571381A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14415878A JPS5571381A (en) 1978-11-24 1978-11-24 Common converter unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14415878A JPS5571381A (en) 1978-11-24 1978-11-24 Common converter unit

Publications (1)

Publication Number Publication Date
JPS5571381A true JPS5571381A (en) 1980-05-29

Family

ID=15355540

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14415878A Pending JPS5571381A (en) 1978-11-24 1978-11-24 Common converter unit

Country Status (1)

Country Link
JP (1) JPS5571381A (en)

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