JPS5223205A - Subscriber s line signal generating and sending system - Google Patents

Subscriber s line signal generating and sending system

Info

Publication number
JPS5223205A
JPS5223205A JP9858075A JP9858075A JPS5223205A JP S5223205 A JPS5223205 A JP S5223205A JP 9858075 A JP9858075 A JP 9858075A JP 9858075 A JP9858075 A JP 9858075A JP S5223205 A JPS5223205 A JP S5223205A
Authority
JP
Japan
Prior art keywords
subscriber
signal generating
line signal
sending system
relays
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
JP9858075A
Other languages
Japanese (ja)
Other versions
JPS5929019B2 (en
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 JP9858075A priority Critical patent/JPS5929019B2/en
Priority to US05/695,760 priority patent/US4150260A/en
Priority to GB24968/76A priority patent/GB1554421A/en
Priority to DE2627140A priority patent/DE2627140C3/en
Priority to CA255,082A priority patent/CA1057437A/en
Priority to NLAANVRAGE7606570,A priority patent/NL178117C/en
Publication of JPS5223205A publication Critical patent/JPS5223205A/en
Publication of JPS5929019B2 publication Critical patent/JPS5929019B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/02—Calling substations, e.g. by ringing

Landscapes

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

Abstract

PURPOSE:To make the system more compact and economical and to improve the transmission quality by eliminating the relays for changing the subscriber cirucit to the signal source side and relays for answering detection in the sending of signals such as the ringing tone, howler tone, etc., when directly accommodating a subscriber in a 4-wire central office.
JP9858075A 1975-06-18 1975-08-15 Subscriber line signal generation and transmission method Expired JPS5929019B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP9858075A JPS5929019B2 (en) 1975-08-15 1975-08-15 Subscriber line signal generation and transmission method
US05/695,760 US4150260A (en) 1975-06-18 1976-06-14 Subscriber's circuit for four-wire-system local switch
GB24968/76A GB1554421A (en) 1975-06-18 1976-06-16 Subscriber's circuit for four-wire-system local switch
DE2627140A DE2627140C3 (en) 1975-06-18 1976-06-16 Hybrid circuit in subscriber circuit
CA255,082A CA1057437A (en) 1975-06-18 1976-06-17 Subscriber's circuit for four-wire-system local switch
NLAANVRAGE7606570,A NL178117C (en) 1975-06-18 1976-06-17 COUPLING DEVICE FOR FORMING A COUPLING BETWEEN A FOUR-WAY PATH OF A TIME MULTIPLEX SWITCH NETWORK AND A TWO-WIRE SUBSCRIBER LINE.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9858075A JPS5929019B2 (en) 1975-08-15 1975-08-15 Subscriber line signal generation and transmission method

Publications (2)

Publication Number Publication Date
JPS5223205A true JPS5223205A (en) 1977-02-22
JPS5929019B2 JPS5929019B2 (en) 1984-07-17

Family

ID=14223583

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9858075A Expired JPS5929019B2 (en) 1975-06-18 1975-08-15 Subscriber line signal generation and transmission method

Country Status (1)

Country Link
JP (1) JPS5929019B2 (en)

Also Published As

Publication number Publication date
JPS5929019B2 (en) 1984-07-17

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