JPS5232210A - Detection system for subscriber response signal - Google Patents

Detection system for subscriber response signal

Info

Publication number
JPS5232210A
JPS5232210A JP10699275A JP10699275A JPS5232210A JP S5232210 A JPS5232210 A JP S5232210A JP 10699275 A JP10699275 A JP 10699275A JP 10699275 A JP10699275 A JP 10699275A JP S5232210 A JPS5232210 A JP S5232210A
Authority
JP
Japan
Prior art keywords
response signal
detection system
subscriber response
subscriber
economization
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
JP10699275A
Other languages
Japanese (ja)
Inventor
Kozo Kamata
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 JP10699275A priority Critical patent/JPS5232210A/en
Publication of JPS5232210A publication Critical patent/JPS5232210A/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
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To perform signal outgoing to subscriber and response signal detection without application of relay circuit, to miniaturize equipment and to improve economization and transmission quality.
JP10699275A 1975-09-05 1975-09-05 Detection system for subscriber response signal Pending JPS5232210A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10699275A JPS5232210A (en) 1975-09-05 1975-09-05 Detection system for subscriber response signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10699275A JPS5232210A (en) 1975-09-05 1975-09-05 Detection system for subscriber response signal

Publications (1)

Publication Number Publication Date
JPS5232210A true JPS5232210A (en) 1977-03-11

Family

ID=14447723

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10699275A Pending JPS5232210A (en) 1975-09-05 1975-09-05 Detection system for subscriber response signal

Country Status (1)

Country Link
JP (1) JPS5232210A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210756A (en) * 1981-06-19 1982-12-24 Nec Corp Telephone exchanger
JPH01215174A (en) * 1988-02-23 1989-08-29 Nec Corp Howler signal transmission system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57210756A (en) * 1981-06-19 1982-12-24 Nec Corp Telephone exchanger
JPH01215174A (en) * 1988-02-23 1989-08-29 Nec Corp Howler signal transmission system

Similar Documents

Publication Publication Date Title
FR2275900A1 (en) PERFECTED SWITCH FOR THE TRANSMISSION OF TELEVISION SIGNALS, ENSURING AN IMPORTANT ISOLATION BETWEEN ITS INPUT TERMINALS
JPS52130219A (en) Transmission control system for call signal
JPS5346205A (en) Data transmission system
JPS5232210A (en) Detection system for subscriber response signal
JPS53121501A (en) Loop transmission system
JPS5362404A (en) Incoming call charging system
JPS53117922A (en) Absence reception voice answer skip system
JPS5255405A (en) Pilot test system
JPS53131706A (en) Automatic telephone exchange system
JPS52125213A (en) Absence transfer system
JPS55136759A (en) Line test system
JPS54162905A (en) Radiotelephony equipment
JPS5372514A (en) Fault detector of repeater
JPS53118908A (en) Monitor unit at incoming side
JPS53131707A (en) Auotmatic telephone exchange system
JPS52120709A (en) Common line signal system
JPS543401A (en) State monitor system for mobile station
JPS5387606A (en) Recording and reproducing device
JPS5275911A (en) Circuit for generating outgoing and incoming switching signal
JPS51124309A (en) Method of testing continuity in stationary picture communication syste m
JPS522208A (en) Means for genratig signal to switch sending and receiving
JPS51150907A (en) Subsriber line signal transmission system
JPS526007A (en) Detection system of the off-hook stgnal of a called subscriber
JPS5464913A (en) Monitor system for subscriber state
JPS5391502A (en) Start-stop system for synchronizing data signal subscriber-line signal