JPS5593364A - Transmission system for digital audible signal tone - Google Patents

Transmission system for digital audible signal tone

Info

Publication number
JPS5593364A
JPS5593364A JP118179A JP118179A JPS5593364A JP S5593364 A JPS5593364 A JP S5593364A JP 118179 A JP118179 A JP 118179A JP 118179 A JP118179 A JP 118179A JP S5593364 A JPS5593364 A JP S5593364A
Authority
JP
Japan
Prior art keywords
intermittent
digital
signal tone
audible signal
time sharing
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
JP118179A
Other languages
Japanese (ja)
Inventor
Masakatsu Kuroki
Yoshinori 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.)
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 JP118179A priority Critical patent/JPS5593364A/en
Publication of JPS5593364A publication Critical patent/JPS5593364A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

PURPOSE:To realize the digital intermittent audible signal tone transmission system which is turned on and off with the time sharing gate circuit sampled in the intermittent period for readout periodically for the stored pattern in PCM for the continuous tones of various audible signals, and to aviod the increase in the memory capacity of digital telephone exchangers. CONSTITUTION:The PCM pattern of a number of continuous audible signals in the memory unit ROM is periodically read out with the readout control circuit RCTL and latched at FF. The counter CTR produces the intermittent periods T1-TK to the countinuous audible signals fa-fp and feeds them to the gates G1-Gn. The gates G1-Gn gate the intermittent periods T1-TK with the sample clocks C1- Cn. The digital intermittent audible signal tone thus obtained is transmitted to the time slot of the time sharing highway HW via the time sharing multiplex circuit SEL.
JP118179A 1979-01-08 1979-01-08 Transmission system for digital audible signal tone Pending JPS5593364A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP118179A JPS5593364A (en) 1979-01-08 1979-01-08 Transmission system for digital audible signal tone

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP118179A JPS5593364A (en) 1979-01-08 1979-01-08 Transmission system for digital audible signal tone

Publications (1)

Publication Number Publication Date
JPS5593364A true JPS5593364A (en) 1980-07-15

Family

ID=11494271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP118179A Pending JPS5593364A (en) 1979-01-08 1979-01-08 Transmission system for digital audible signal tone

Country Status (1)

Country Link
JP (1) JPS5593364A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204678A (en) * 1981-06-12 1982-12-15 Nec Corp Holding tone sending system
JPS5986359A (en) * 1982-11-08 1984-05-18 Mitsubishi Electric Corp Digital tone generating circuit
JPS60149A (en) * 1983-06-06 1985-01-05 Nippo Tsushin Kogyo Kk Control system for signal transmission
JPS63200657A (en) * 1987-02-17 1988-08-18 Taiko Denki Seisakusho:Kk Audible ringing signal sending control system in digital key telephone system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57204678A (en) * 1981-06-12 1982-12-15 Nec Corp Holding tone sending system
JPS5986359A (en) * 1982-11-08 1984-05-18 Mitsubishi Electric Corp Digital tone generating circuit
JPS60149A (en) * 1983-06-06 1985-01-05 Nippo Tsushin Kogyo Kk Control system for signal transmission
JPH0230622B2 (en) * 1983-06-06 1990-07-09 Hitachi Terekomu Tekunorojii Kk
JPS63200657A (en) * 1987-02-17 1988-08-18 Taiko Denki Seisakusho:Kk Audible ringing signal sending control system in digital key telephone system

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