JPS5732168A - No-ringing network controller - Google Patents

No-ringing network controller

Info

Publication number
JPS5732168A
JPS5732168A JP10729980A JP10729980A JPS5732168A JP S5732168 A JPS5732168 A JP S5732168A JP 10729980 A JP10729980 A JP 10729980A JP 10729980 A JP10729980 A JP 10729980A JP S5732168 A JPS5732168 A JP S5732168A
Authority
JP
Japan
Prior art keywords
terminal
power source
receiving circuit
line
capacitor
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
JP10729980A
Other languages
Japanese (ja)
Other versions
JPS6216594B2 (en
Inventor
Kazuhiko Shirai
Riyouji Yoshihara
Kazuo Kanai
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 JP10729980A priority Critical patent/JPS5732168A/en
Publication of JPS5732168A publication Critical patent/JPS5732168A/en
Publication of JPS6216594B2 publication Critical patent/JPS6216594B2/ja
Granted 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
    • H04M19/023—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone by reversing the polarity of the current at the exchange

Landscapes

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

Abstract

PURPOSE:To prevent the ringing phenomenon of a telephone set occurring when a calling power source is used as an operating power source, by rounding sudden variations of a current by inserting an integral network into a signal input part for control over a data transmitting network which uses general subscriber lines. CONSTITUTION:When a line voltage discriminating circuit 12 connected to general subscriber line discriminates a telephone line being held at a prescribed voltage with prescribed polarity, a switch 14 is controlled to supply electric power from a power source 13 to a receiving circuit 15. The terminal 31 of the switch 14 is connected to the power source 13, the terminal 41 to the line voltage discriminating cicuit, and the terminal 61 to the power termnal of the receiving circuit 15; and a resistance R1 and a capacitor C1 are inserted as an integral network into a signal input part at the terminal 41, and the rise and fall of a signal are rounded with a time constant based upon the resistance R1 and capacitor C1, thereby limiting a current for receiving circuit supplied from the terminal 31.
JP10729980A 1980-08-05 1980-08-05 No-ringing network controller Granted JPS5732168A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10729980A JPS5732168A (en) 1980-08-05 1980-08-05 No-ringing network controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10729980A JPS5732168A (en) 1980-08-05 1980-08-05 No-ringing network controller

Publications (2)

Publication Number Publication Date
JPS5732168A true JPS5732168A (en) 1982-02-20
JPS6216594B2 JPS6216594B2 (en) 1987-04-13

Family

ID=14455569

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10729980A Granted JPS5732168A (en) 1980-08-05 1980-08-05 No-ringing network controller

Country Status (1)

Country Link
JP (1) JPS5732168A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958959A (en) * 1982-09-28 1984-04-04 Nec Corp Telephone and data transmitting system in common use of line
JPH0364158A (en) * 1989-07-31 1991-03-19 Sharp Corp Network controller for terminal equipment

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53101912A (en) * 1977-02-18 1978-09-05 Oki Electric Ind Co Ltd Transmitter circuit for polarity-inverted pulse
JPS5596755A (en) * 1979-01-17 1980-07-23 Nec Corp Terminal starting system
JPS55124356A (en) * 1979-03-19 1980-09-25 Nec Corp Data transmission system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53101912A (en) * 1977-02-18 1978-09-05 Oki Electric Ind Co Ltd Transmitter circuit for polarity-inverted pulse
JPS5596755A (en) * 1979-01-17 1980-07-23 Nec Corp Terminal starting system
JPS55124356A (en) * 1979-03-19 1980-09-25 Nec Corp Data transmission system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5958959A (en) * 1982-09-28 1984-04-04 Nec Corp Telephone and data transmitting system in common use of line
JPH048989B2 (en) * 1982-09-28 1992-02-18
JPH0364158A (en) * 1989-07-31 1991-03-19 Sharp Corp Network controller for terminal equipment

Also Published As

Publication number Publication date
JPS6216594B2 (en) 1987-04-13

Similar Documents

Publication Publication Date Title
ES8306556A1 (en) Solid state telephone line interface circuit with ringing capability
US3870831A (en) Telephone hold circuit
ES346305A2 (en) Telephone system with added main line subscriber facilities
JPS6473844A (en) Radio communication equipment
JPS5732168A (en) No-ringing network controller
FI950854A0 (en) Message channel switching arrangement
CA2076976A1 (en) Private telephone system with simplified command feature
JPS56158557A (en) Digital communication system
FR2423096A1 (en) Ringing circuit for centrally controlled telephone exchange junction - has alternating signal source, and bipolar electronic switch output connected to subscriber and timer
JPS55124356A (en) Data transmission system
JPS5797762A (en) Analogue switch circuit
JPS5757035A (en) Radio device
GB1475575A (en) Telephone system
JPS56156056A (en) Discriminating system for incoming call
JPS56157168A (en) Start deciding circuit of network control device
JPS5792964A (en) Network control device
JPS6464528A (en) Output voltage switching circuit
EP0520156A3 (en)
JPS56164657A (en) Circuit for telephone set
JPS6473851A (en) Terminal connection identifying system
JPS56159716A (en) Direct-current electric power device
JPS57207471A (en) Power supply system for telephone set
JPS6415802A (en) Remote control type controller for electric equipment
SU834911A1 (en) Switching device
JPS5630355A (en) Call selection system of terminal equipment