JPS554185A - Measuring circuit for dial pulse distortion - Google Patents

Measuring circuit for dial pulse distortion

Info

Publication number
JPS554185A
JPS554185A JP7774878A JP7774878A JPS554185A JP S554185 A JPS554185 A JP S554185A JP 7774878 A JP7774878 A JP 7774878A JP 7774878 A JP7774878 A JP 7774878A JP S554185 A JPS554185 A JP S554185A
Authority
JP
Japan
Prior art keywords
distortion
dial
generates
monostable multivibrator
pulse
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
JP7774878A
Other languages
Japanese (ja)
Inventor
Shizuo Asano
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 JP7774878A priority Critical patent/JPS554185A/en
Publication of JPS554185A publication Critical patent/JPS554185A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/24—Arrangements for supervision, monitoring or testing with provision for checking the normal operation

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To enable a rapid recovery from a fault by simplifying the measurement of dial distortion appearing at a carrier unit and transmission line by making a disconnection from a switchboard by equipping the carrier unit with a dial-distortion measuring circuit composed of a simple circuit. CONSTITUTION:Monostable multivibrator 21 generates reference pulses by an input signal. A reference pulse is compared with input dial distortion by OR-ELSE circuit 20, whose output is led to monostable multivibrator 16 for the detection of the accurate value of a make error, and AND gates 17 to 19. On detecting the error, monostable multivibrator 16 generates a pulse of a width of 5% in make ratio. Monostable multivibrator 15 generates a similar pulse lagging by 5%. Monostable multivibrator 14 also generates a pulse lagging by 5%. Therefore, gate 19 generates its output with dial distortion of 5% and below, gates 19 and 18 both generate outputs with distortion of 5 to 10%, and gates 19, 18 and 17 all generate outputs with distortion of 15% or above, so that the dial distortion can be measured by freely setting the times of multivibrators 14 to 16.
JP7774878A 1978-06-26 1978-06-26 Measuring circuit for dial pulse distortion Pending JPS554185A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7774878A JPS554185A (en) 1978-06-26 1978-06-26 Measuring circuit for dial pulse distortion

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7774878A JPS554185A (en) 1978-06-26 1978-06-26 Measuring circuit for dial pulse distortion

Publications (1)

Publication Number Publication Date
JPS554185A true JPS554185A (en) 1980-01-12

Family

ID=13642527

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7774878A Pending JPS554185A (en) 1978-06-26 1978-06-26 Measuring circuit for dial pulse distortion

Country Status (1)

Country Link
JP (1) JPS554185A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183332U (en) * 1981-01-23 1982-11-20

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57183332U (en) * 1981-01-23 1982-11-20

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