JPS5739652A - Detection circuit for response of other party in automatic transfer telephone - Google Patents

Detection circuit for response of other party in automatic transfer telephone

Info

Publication number
JPS5739652A
JPS5739652A JP11468280A JP11468280A JPS5739652A JP S5739652 A JPS5739652 A JP S5739652A JP 11468280 A JP11468280 A JP 11468280A JP 11468280 A JP11468280 A JP 11468280A JP S5739652 A JPS5739652 A JP S5739652A
Authority
JP
Japan
Prior art keywords
polarity
line
relay
inverted
called party
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.)
Granted
Application number
JP11468280A
Other languages
Japanese (ja)
Other versions
JPS6339134B2 (en
Inventor
Masao Uchiumi
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP11468280A priority Critical patent/JPS5739652A/en
Publication of JPS5739652A publication Critical patent/JPS5739652A/en
Publication of JPS6339134B2 publication Critical patent/JPS6339134B2/ja
Granted 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 enable to detect the response independently of the connecting polarity of called party line, by detecting the polarity inversion of line based on the end of call and response of a called party as one-shot signal and supplying it to a control circuit. CONSTITUTION:A relay 45 is connected in parallel with a series circuit of capacitors C1, C2. When a called party responds and the polarity of lines L1', L2' is inverted, a current flowing to the relay 45 is gradually from positive to negative or vice versa with the operation of the C1, C2. On the other hand, even if the polarity of the lines L1', L2' is rapidly inverted, a current flows near zero point for a sufficient time to restore the relay 45 to the relay 45. The 1st state where the called partty responds and the polarity of line is inverted, and the 2nd state the call is finished and the polarity of line is again inverted through the mounting of a hand set by the called party, can be detected with a capacitor C3 for the control of line connection.
JP11468280A 1980-08-22 1980-08-22 Detection circuit for response of other party in automatic transfer telephone Granted JPS5739652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11468280A JPS5739652A (en) 1980-08-22 1980-08-22 Detection circuit for response of other party in automatic transfer telephone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11468280A JPS5739652A (en) 1980-08-22 1980-08-22 Detection circuit for response of other party in automatic transfer telephone

Publications (2)

Publication Number Publication Date
JPS5739652A true JPS5739652A (en) 1982-03-04
JPS6339134B2 JPS6339134B2 (en) 1988-08-03

Family

ID=14643996

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11468280A Granted JPS5739652A (en) 1980-08-22 1980-08-22 Detection circuit for response of other party in automatic transfer telephone

Country Status (1)

Country Link
JP (1) JPS5739652A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5533515U (en) * 1978-08-23 1980-03-04

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280518A (en) * 1975-12-26 1977-07-06 Aisin Seiki Valve device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5533515U (en) * 1978-08-23 1980-03-04

Also Published As

Publication number Publication date
JPS6339134B2 (en) 1988-08-03

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