JPS5277605A - Public telephon - Google Patents

Public telephon

Info

Publication number
JPS5277605A
JPS5277605A JP15437675A JP15437675A JPS5277605A JP S5277605 A JPS5277605 A JP S5277605A JP 15437675 A JP15437675 A JP 15437675A JP 15437675 A JP15437675 A JP 15437675A JP S5277605 A JPS5277605 A JP S5277605A
Authority
JP
Japan
Prior art keywords
telephon
public
telephone
stably
loop
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
JP15437675A
Other languages
English (en)
Japanese (ja)
Other versions
JPS5519110B2 (enrdf_load_stackoverflow
Inventor
Kenji Etsuno
Takumi Kawashima
Hiroyasu Sasaki
Osamu Shinohara
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.)
Nippon Telegraph and Telephone Corp
Tamura Electric Works Ltd
Original Assignee
Nippon Telegraph and Telephone Corp
Tamura Electric Works 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 Nippon Telegraph and Telephone Corp, Tamura Electric Works Ltd filed Critical Nippon Telegraph and Telephone Corp
Priority to JP15437675A priority Critical patent/JPS5277605A/ja
Publication of JPS5277605A publication Critical patent/JPS5277605A/ja
Publication of JPS5519110B2 publication Critical patent/JPS5519110B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Prepayment Telephone Systems (AREA)
JP15437675A 1975-12-24 1975-12-24 Public telephon Granted JPS5277605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15437675A JPS5277605A (en) 1975-12-24 1975-12-24 Public telephon

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15437675A JPS5277605A (en) 1975-12-24 1975-12-24 Public telephon

Publications (2)

Publication Number Publication Date
JPS5277605A true JPS5277605A (en) 1977-06-30
JPS5519110B2 JPS5519110B2 (enrdf_load_stackoverflow) 1980-05-23

Family

ID=15582792

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15437675A Granted JPS5277605A (en) 1975-12-24 1975-12-24 Public telephon

Country Status (1)

Country Link
JP (1) JPS5277605A (enrdf_load_stackoverflow)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4849310A (enrdf_load_stackoverflow) * 1971-10-09 1973-07-12

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4849310A (enrdf_load_stackoverflow) * 1971-10-09 1973-07-12

Also Published As

Publication number Publication date
JPS5519110B2 (enrdf_load_stackoverflow) 1980-05-23

Similar Documents

Publication Publication Date Title
JPS5362911A (en) Local calling system by in-trunk
JPS5277605A (en) Public telephon
JPS5218108A (en) Conference telephone circuit
JPS5279807A (en) Receiving control system
FR2320672A1 (fr) Montage pour l'alimentation centrale de postes d'abonne dans des installations de telecommunications, notamment dans des installations telephoniques
ES455499A1 (es) Perfeccionamientos en dispositivos de control de superposi- cion para aparatos excitadores de cinescopios de television.
JPS522106A (en) Loop around connection control system
JPS5247305A (en) Extension calling systemof button telephone system
JPS5339808A (en) Control circuit
JPS53100708A (en) Current supply circuit
JPS5252505A (en) Lie-bus display circuit of ke telephone equipment
JPS5227536A (en) Semiconductor switching device
JPS5420602A (en) Incoming detection circuit of network controller
ES439298A1 (es) Perfeccionamientos introducidos en las conexiones de insta- laciones de interfono, de intercomunicacion en duplex o de instalaciones de altavoces mandadas por pulsadores.
JPS5213708A (en) Telephone set
JPS5234601A (en) Calling circuit
JPS522109A (en) Dc current supplying circuit
JPS5236402A (en) Tone-ringer circuit for telephone
JPS51132908A (en) Call back method of an electrode switchboard
JPS51115710A (en) Telephone exchange device
JPS51132905A (en) Telephone call apparatus
JPS526404A (en) Calling system of the button telephone set
JPS5373010A (en) Privacy call circuit of buttom telephon device
JPS51135301A (en) Radio supervisory control block
JPS5421206A (en) Absence communication system