JPS54130806A - Signal discrimination system or busy tone and so on - Google Patents

Signal discrimination system or busy tone and so on

Info

Publication number
JPS54130806A
JPS54130806A JP3902078A JP3902078A JPS54130806A JP S54130806 A JPS54130806 A JP S54130806A JP 3902078 A JP3902078 A JP 3902078A JP 3902078 A JP3902078 A JP 3902078A JP S54130806 A JPS54130806 A JP S54130806A
Authority
JP
Japan
Prior art keywords
level
value
cpu
signals
irregularity
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
JP3902078A
Other languages
Japanese (ja)
Other versions
JPS567340B2 (en
Inventor
Gunpei Hirakawa
Takao Kubota
Shunji Goto
Toshiharu Suzuki
Kazumi Haishi
Shigeru Yoshida
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.)
TAKACHIHO TSUSHIN KIKI SEISAKUSHO KK
TAKACHIHO TSUSHINKIKI
Nippon Telegraph and Telephone Corp
Original Assignee
TAKACHIHO TSUSHIN KIKI SEISAKUSHO KK
TAKACHIHO TSUSHINKIKI
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 TAKACHIHO TSUSHIN KIKI SEISAKUSHO KK, TAKACHIHO TSUSHINKIKI, Nippon Telegraph and Telephone Corp filed Critical TAKACHIHO TSUSHIN KIKI SEISAKUSHO KK
Priority to JP3902078A priority Critical patent/JPS54130806A/en
Publication of JPS54130806A publication Critical patent/JPS54130806A/en
Publication of JPS567340B2 publication Critical patent/JPS567340B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
    • H04M1/65—Recording arrangements for recording a message from the calling party
    • H04M1/654—Telephone line monitoring circuits therefor, e.g. ring detectors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/82—Line monitoring circuits for call progress or status discrimination

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)

Abstract

PURPOSE:To make it possible to discriminate various signals which will occur in the future, by monitoring the irregularity value of signal periods and discriminating signals as periodic signals other than sound when the irregularity value becomes lower than a rated value. CONSTITUTION:CPU 3 monitors through bus line 8 that the signal from waveform shaping circuit 2 is H-level or L-level. Then, the count result of the H level and the count result of the L level are stored at address 2 and address 3 in data temporary store memory 5 respectively. CPU 3 adds count results at addresses 2 and 3 in data temporary store memory 5 to operate the irregularity value and the average value for each period each time the level is changed. CPU 3 compares this operation result with the irregularity value which is stored in rated value setting memory 6 and dicriminates whether the operation result becomes lower than the rated value or not, and next, CPU 3 compares the periodic property of signals to dicriminate various signals.
JP3902078A 1978-04-03 1978-04-03 Signal discrimination system or busy tone and so on Granted JPS54130806A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3902078A JPS54130806A (en) 1978-04-03 1978-04-03 Signal discrimination system or busy tone and so on

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3902078A JPS54130806A (en) 1978-04-03 1978-04-03 Signal discrimination system or busy tone and so on

Publications (2)

Publication Number Publication Date
JPS54130806A true JPS54130806A (en) 1979-10-11
JPS567340B2 JPS567340B2 (en) 1981-02-17

Family

ID=12541414

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3902078A Granted JPS54130806A (en) 1978-04-03 1978-04-03 Signal discrimination system or busy tone and so on

Country Status (1)

Country Link
JP (1) JPS54130806A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151761A (en) * 1982-03-05 1983-09-09 Nec Corp Detection system of audible signal tone
JPS6035670U (en) * 1983-08-13 1985-03-12 パイオニアアンサホン株式会社 Telephone line bee tone detection circuit
US4544808A (en) * 1982-12-14 1985-10-01 Mitel Corporation Telephone indicator
JPS61224552A (en) * 1985-03-28 1986-10-06 Nitsuko Corp Informing destination call system in emergency informer
JPH01231561A (en) * 1988-03-11 1989-09-14 Fujitsu Ltd Busy tone detecting system
JPH07235976A (en) * 1994-02-22 1995-09-05 Murata Mach Ltd Automatic answering telephone set

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58151761A (en) * 1982-03-05 1983-09-09 Nec Corp Detection system of audible signal tone
US4544808A (en) * 1982-12-14 1985-10-01 Mitel Corporation Telephone indicator
JPS6035670U (en) * 1983-08-13 1985-03-12 パイオニアアンサホン株式会社 Telephone line bee tone detection circuit
JPS61224552A (en) * 1985-03-28 1986-10-06 Nitsuko Corp Informing destination call system in emergency informer
JPH01231561A (en) * 1988-03-11 1989-09-14 Fujitsu Ltd Busy tone detecting system
JPH07235976A (en) * 1994-02-22 1995-09-05 Murata Mach Ltd Automatic answering telephone set

Also Published As

Publication number Publication date
JPS567340B2 (en) 1981-02-17

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