JPS5612168A - Automatic transfer unit for extension call of key telephone set - Google Patents

Automatic transfer unit for extension call of key telephone set

Info

Publication number
JPS5612168A
JPS5612168A JP8703279A JP8703279A JPS5612168A JP S5612168 A JPS5612168 A JP S5612168A JP 8703279 A JP8703279 A JP 8703279A JP 8703279 A JP8703279 A JP 8703279A JP S5612168 A JPS5612168 A JP S5612168A
Authority
JP
Japan
Prior art keywords
telephone set
calling
signal
call
transfer
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
JP8703279A
Other languages
Japanese (ja)
Inventor
Mamoru Senzai
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
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP8703279A priority Critical patent/JPS5612168A/en
Publication of JPS5612168A publication Critical patent/JPS5612168A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/58—Arrangements for transferring received calls from one subscriber to another; Arrangements affording interim conversations between either the calling or the called party and a third party

Abstract

PURPOSE:To make telephone transfer possible without any caretaker by making it possible to transfer automatically a call, made to an invariably-attendant telephone set, to the destination of a temporary movement. CONSTITUTION:When telephone set 1A calls telephone set 1B and transfers a call to telephone set 1C, extension calling operation is performed by telephone set 1B to call telephone set 1C. While a calling signal appears on calling signal line 3, depressing set switch 15 makes transfer-destination signal memory circuit 13 read the calling signal. Next, when the extension calling operation of calling telephone set 1B is performed by telephone set 1A, a calling signal that corresponds to telephone set 1B appears on signal line 3. This signal is detected by called detecting circuit 11 of transfer unit 10 and detection signal line 12 changes in state, so that output circuit 14 will be held in readiness.
JP8703279A 1979-07-10 1979-07-10 Automatic transfer unit for extension call of key telephone set Pending JPS5612168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8703279A JPS5612168A (en) 1979-07-10 1979-07-10 Automatic transfer unit for extension call of key telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8703279A JPS5612168A (en) 1979-07-10 1979-07-10 Automatic transfer unit for extension call of key telephone set

Publications (1)

Publication Number Publication Date
JPS5612168A true JPS5612168A (en) 1981-02-06

Family

ID=13903604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8703279A Pending JPS5612168A (en) 1979-07-10 1979-07-10 Automatic transfer unit for extension call of key telephone set

Country Status (1)

Country Link
JP (1) JPS5612168A (en)

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