JPS51117811A - Call signal send system - Google Patents

Call signal send system

Info

Publication number
JPS51117811A
JPS51117811A JP4236175A JP4236175A JPS51117811A JP S51117811 A JPS51117811 A JP S51117811A JP 4236175 A JP4236175 A JP 4236175A JP 4236175 A JP4236175 A JP 4236175A JP S51117811 A JPS51117811 A JP S51117811A
Authority
JP
Japan
Prior art keywords
call signal
signal send
send system
economized
multiplex
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
JP4236175A
Other languages
Japanese (ja)
Inventor
Shige Miyoshi
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 JP4236175A priority Critical patent/JPS51117811A/en
Publication of JPS51117811A publication Critical patent/JPS51117811A/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:The call signal send system is economized by using a multiplex-mode call signal send circuit having a function to detect call signal trunk ring trips.
JP4236175A 1975-04-09 1975-04-09 Call signal send system Pending JPS51117811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4236175A JPS51117811A (en) 1975-04-09 1975-04-09 Call signal send system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4236175A JPS51117811A (en) 1975-04-09 1975-04-09 Call signal send system

Publications (1)

Publication Number Publication Date
JPS51117811A true JPS51117811A (en) 1976-10-16

Family

ID=12633886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4236175A Pending JPS51117811A (en) 1975-04-09 1975-04-09 Call signal send system

Country Status (1)

Country Link
JP (1) JPS51117811A (en)

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