JPS5496309A - Signal tone transmission system - Google Patents

Signal tone transmission system

Info

Publication number
JPS5496309A
JPS5496309A JP280678A JP280678A JPS5496309A JP S5496309 A JPS5496309 A JP S5496309A JP 280678 A JP280678 A JP 280678A JP 280678 A JP280678 A JP 280678A JP S5496309 A JPS5496309 A JP S5496309A
Authority
JP
Japan
Prior art keywords
signal
relay
telephone
circuit
contact
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
JP280678A
Other languages
Japanese (ja)
Inventor
Kiyohiko Abe
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP280678A priority Critical patent/JPS5496309A/en
Publication of JPS5496309A publication Critical patent/JPS5496309A/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 enhance the economical performance as well as to avoid such phenomenon that the channel switch is occupied while the signal is being sent by using the idle sending phase of the calling signal for sending the signal different from the calling signal via the switching circuit. CONSTITUTION:In case the alarm tone is sent out via the idle sending phase (contact int2), signal sending relay RA operates via circuit designation contact C0 within CONT5 when the signal is received at line circuit 2a. Thus , contact intO repeats 1- second ON and 2-second OFF according to the operation and releasing of relay INTO to ring the bell of telephone 1a by means of signal tone OSC-R of call signal transmission part 6. While in case the alarm is given to at the off-hook of telephone 1b of line circuit 2b while the call signal is being sent to telephone 1a, circuit designating contact C1 is turned and off based on the operation property of relay INT2. According to this action, the RB relay is actuated, and at the same time s witch relay TR within switching circuit 8 is actuated and released via int2 to give switching between generation part and alarm tone generation part 7. Thus, the alarm tone of 1-second ON and 2-seco ON and 2-second OFF is supplied to telephone 2b.
JP280678A 1978-01-17 1978-01-17 Signal tone transmission system Pending JPS5496309A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP280678A JPS5496309A (en) 1978-01-17 1978-01-17 Signal tone transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP280678A JPS5496309A (en) 1978-01-17 1978-01-17 Signal tone transmission system

Publications (1)

Publication Number Publication Date
JPS5496309A true JPS5496309A (en) 1979-07-30

Family

ID=11539617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP280678A Pending JPS5496309A (en) 1978-01-17 1978-01-17 Signal tone transmission system

Country Status (1)

Country Link
JP (1) JPS5496309A (en)

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