JPS56143756A - In-use and stand-by type call signal power source system for telephone - Google Patents

In-use and stand-by type call signal power source system for telephone

Info

Publication number
JPS56143756A
JPS56143756A JP4713980A JP4713980A JPS56143756A JP S56143756 A JPS56143756 A JP S56143756A JP 4713980 A JP4713980 A JP 4713980A JP 4713980 A JP4713980 A JP 4713980A JP S56143756 A JPS56143756 A JP S56143756A
Authority
JP
Japan
Prior art keywords
unit
stand
power source
synchronizing signal
call signal
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
JP4713980A
Other languages
Japanese (ja)
Other versions
JPS6020943B2 (en
Inventor
Toshio Koizumi
Koichi Kobayashi
Takehiko Ichikawa
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP55047139A priority Critical patent/JPS6020943B2/en
Publication of JPS56143756A publication Critical patent/JPS56143756A/en
Publication of JPS6020943B2 publication Critical patent/JPS6020943B2/en
Expired 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Landscapes

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

Abstract

PURPOSE:To increase the power source capacity for a system as required by composing the system of an in-use/stand-by type call signal power source operating as a master equipment and that operating as a subordinate equipment. CONSTITUTION:As in-use unit 11a operates as a master equipment, a synchronizing signal is outputted from synchronizing signal output terminal M to synchronizing signal input terminal S of unit 11b, and stand-by unit 11b is operated synchronizing with unit 11a. The synchronizing signal of unit 11a is supplied to synchronizing signal input terminals S of in-use unit 12a and stand-by unit 12b of device 122 via OR circuit 151, and units 12a and 12b are operated synchronously. If unit 11a is troubled, a condition signal is outputted from condition signal generating circuit 14 and unit 11b operates as the master equipment. If unit 12a is troubled, on the other hand, change-over switch 132a turns off, and change-over switch 132b turns on, so that a call signal voltage will be outputted from unit 12b.
JP55047139A 1980-04-10 1980-04-10 Ringing signal power supply system for active and standby telephones Expired JPS6020943B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55047139A JPS6020943B2 (en) 1980-04-10 1980-04-10 Ringing signal power supply system for active and standby telephones

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55047139A JPS6020943B2 (en) 1980-04-10 1980-04-10 Ringing signal power supply system for active and standby telephones

Publications (2)

Publication Number Publication Date
JPS56143756A true JPS56143756A (en) 1981-11-09
JPS6020943B2 JPS6020943B2 (en) 1985-05-24

Family

ID=12766770

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55047139A Expired JPS6020943B2 (en) 1980-04-10 1980-04-10 Ringing signal power supply system for active and standby telephones

Country Status (1)

Country Link
JP (1) JPS6020943B2 (en)

Also Published As

Publication number Publication date
JPS6020943B2 (en) 1985-05-24

Similar Documents

Publication Publication Date Title
JPS6437134A (en) Optical regenerator for locating fault in optical transmission system
JPS56143756A (en) In-use and stand-by type call signal power source system for telephone
JPS5725734A (en) Party call receiver
JPS56143755A (en) In-use and stand-by type call signal power source unit for telephone
JPS5591009A (en) Switching control unit
JPS5478005A (en) Subscribersigma line control system
JPS55140352A (en) Speaker telephone set connecting system
JPS5725743A (en) Maintenance system of radio telephone system
JPS57168565A (en) Special common-battery service system
JPS56143754A (en) Power source system for call signal for telephone
JPS56119570A (en) Emergency communication system
JPS54109712A (en) Multiplying circuit switching system
JPS54157422A (en) Multiplied transmission system
JPS5757074A (en) System for operation confirmation of audio response system
JPS5652961A (en) Inter-call system of key telephone system
JPS56128028A (en) Voice duplex communicating system
JPS52100803A (en) Call wating system
JPS5429903A (en) Conference service system of key telephonen system
JPS5446498A (en) Operation test circuit of centralized annunciator
JPS5737961A (en) Testing data generating equipment
JPS56104551A (en) Line switching system
JPS57127356A (en) Audio response unit
JPS55138961A (en) Inter-communication system
JPS55123286A (en) Switching system of electronic switchboard control part
GB936009A (en) Improvements in or relating to telephone systems