JPS52153605A - Signal transmission system - Google Patents

Signal transmission system

Info

Publication number
JPS52153605A
JPS52153605A JP7136876A JP7136876A JPS52153605A JP S52153605 A JPS52153605 A JP S52153605A JP 7136876 A JP7136876 A JP 7136876A JP 7136876 A JP7136876 A JP 7136876A JP S52153605 A JPS52153605 A JP S52153605A
Authority
JP
Japan
Prior art keywords
signal transmission
transmission system
impedance signal
dial system
thru
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
JP7136876A
Other languages
Japanese (ja)
Inventor
Eishi Ikeda
Motomi Nishiuma
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.)
HASEGAWA DENKI SEISAKUSHO
HASEGAWA DENKI SEISAKUSHO KK
Nippon Telegraph and Telephone Corp
Original Assignee
HASEGAWA DENKI SEISAKUSHO
HASEGAWA DENKI SEISAKUSHO KK
Nippon Telegraph and Telephone Corp
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 HASEGAWA DENKI SEISAKUSHO, HASEGAWA DENKI SEISAKUSHO KK, Nippon Telegraph and Telephone Corp filed Critical HASEGAWA DENKI SEISAKUSHO
Priority to JP7136876A priority Critical patent/JPS52153605A/en
Publication of JPS52153605A publication Critical patent/JPS52153605A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/38—Signalling arrangements; Manipulation of signalling currents using combinations of direct currents of different amplitudes or polarities over line conductors or combination of line conductors

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)

Abstract

PURPOSE:To enable the economy in the DC dial system and push button dial system, by discriminating the impedance signal at the exchanger side, thru the provision of the impedance signal circuit in the terminal equipment.
JP7136876A 1976-06-17 1976-06-17 Signal transmission system Pending JPS52153605A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7136876A JPS52153605A (en) 1976-06-17 1976-06-17 Signal transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7136876A JPS52153605A (en) 1976-06-17 1976-06-17 Signal transmission system

Publications (1)

Publication Number Publication Date
JPS52153605A true JPS52153605A (en) 1977-12-20

Family

ID=13458478

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7136876A Pending JPS52153605A (en) 1976-06-17 1976-06-17 Signal transmission system

Country Status (1)

Country Link
JP (1) JPS52153605A (en)

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