JPS61245787A - Automatic answering doorphone set - Google Patents

Automatic answering doorphone set

Info

Publication number
JPS61245787A
JPS61245787A JP8793985A JP8793985A JPS61245787A JP S61245787 A JPS61245787 A JP S61245787A JP 8793985 A JP8793985 A JP 8793985A JP 8793985 A JP8793985 A JP 8793985A JP S61245787 A JPS61245787 A JP S61245787A
Authority
JP
Japan
Prior art keywords
doorphone
section
telephone set
busy
controlled
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
JP8793985A
Other languages
Japanese (ja)
Inventor
Akihiro Hasegawa
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 JP8793985A priority Critical patent/JPS61245787A/en
Publication of JPS61245787A publication Critical patent/JPS61245787A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To inform a caller of a doorphone such as a visitor of the presence of a called party even when a called telephone set is busy with an external line by providing an automatic information sending function to the doorphone.
CONSTITUTION: When an incoming detection signal is applied to a control section 6, the section 6 discriminates a signal from a talking detection section 5 and when it is confirmed that a key telephone set 3 is not busy, a talking switch section 9 is controlled to short-circuit points C and B, and a call tone sending section 7 is controlled to send a call tone to both the doorphone 1 and the telephone set 3. In case of an incoming call to the doorphone, when the telephone set 3 is busy, the control section 6 controls a talking switch section 9 to short-circuit points A and C, and then the section 7 is controlled to send a call tone to the telephone set 3. Further, a message sending section 8 is controlled to send a message to a doorphone 11 in order to inform it to a doorphone caller that the telephone set 3 is busy.
COPYRIGHT: (C)1986,JPO&Japio
JP8793985A 1985-04-24 1985-04-24 Automatic answering doorphone set Pending JPS61245787A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8793985A JPS61245787A (en) 1985-04-24 1985-04-24 Automatic answering doorphone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8793985A JPS61245787A (en) 1985-04-24 1985-04-24 Automatic answering doorphone set

Publications (1)

Publication Number Publication Date
JPS61245787A true JPS61245787A (en) 1986-11-01

Family

ID=13928871

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8793985A Pending JPS61245787A (en) 1985-04-24 1985-04-24 Automatic answering doorphone set

Country Status (1)

Country Link
JP (1) JPS61245787A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6433254U (en) * 1987-08-24 1989-03-01
JPH0419889U (en) * 1990-05-31 1992-02-19

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6433254U (en) * 1987-08-24 1989-03-01
JPH0419889U (en) * 1990-05-31 1992-02-19

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