JPS5738047A - Signal system for digital telephone set - Google Patents

Signal system for digital telephone set

Info

Publication number
JPS5738047A
JPS5738047A JP11429280A JP11429280A JPS5738047A JP S5738047 A JPS5738047 A JP S5738047A JP 11429280 A JP11429280 A JP 11429280A JP 11429280 A JP11429280 A JP 11429280A JP S5738047 A JPS5738047 A JP S5738047A
Authority
JP
Japan
Prior art keywords
tone
telephone set
signal
audible
transmits
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
JP11429280A
Other languages
Japanese (ja)
Inventor
Fujio Amamiya
Naoki Matsuo
Akinobu Tomimori
Ryuichi Shibata
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
Nippon Telegraph and Telephone Corp
Original Assignee
NEC Corp
Nippon Telegraph and Telephone 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 Telegraph and Telephone Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP11429280A priority Critical patent/JPS5738047A/en
Publication of JPS5738047A publication Critical patent/JPS5738047A/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
    • H04M19/04—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

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

Abstract

PURPOSE:To decrease the required signal speed and to make the mechanical recognition of audible tone easy, by transmitting an audible tone signal from an exchanger to a telephone set and driving an audible oscillator installed in the telephone set. CONSTITUTION:When a digital telephone set 1 is at off-hook, a subscriber exchanger 15 transmits a transmission tone code to the telephone set 1. The telephone set 1 transmits a reception signal at an interface circuit 13 to a signal decoder 11 via a signal/voice assembling/decompositon circuit 12. The signal decoder 11 identifies signals and produces audible tone corresponding to the signal with a variable tone oscillator 10, and this transmits an outgoing tone from a receiver 6 via a receiving amplifier 7. Audible tones such as busy tone, howler tone can also be produced through the same operations.
JP11429280A 1980-08-20 1980-08-20 Signal system for digital telephone set Pending JPS5738047A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11429280A JPS5738047A (en) 1980-08-20 1980-08-20 Signal system for digital telephone set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11429280A JPS5738047A (en) 1980-08-20 1980-08-20 Signal system for digital telephone set

Publications (1)

Publication Number Publication Date
JPS5738047A true JPS5738047A (en) 1982-03-02

Family

ID=14634195

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11429280A Pending JPS5738047A (en) 1980-08-20 1980-08-20 Signal system for digital telephone set

Country Status (1)

Country Link
JP (1) JPS5738047A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6162271A (en) * 1984-09-04 1986-03-31 Fujitsu Ltd Tone signal generation system in terminal device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130206A (en) * 1976-04-24 1977-11-01 Fujitsu Ltd Time sharing exchange system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52130206A (en) * 1976-04-24 1977-11-01 Fujitsu Ltd Time sharing exchange system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6162271A (en) * 1984-09-04 1986-03-31 Fujitsu Ltd Tone signal generation system in terminal device

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