JPS5491110A - Trunk equipment - Google Patents

Trunk equipment

Info

Publication number
JPS5491110A
JPS5491110A JP15876777A JP15876777A JPS5491110A JP S5491110 A JPS5491110 A JP S5491110A JP 15876777 A JP15876777 A JP 15876777A JP 15876777 A JP15876777 A JP 15876777A JP S5491110 A JPS5491110 A JP S5491110A
Authority
JP
Japan
Prior art keywords
contacts
trunk equipment
dial pulse
loop closing
contact
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
JP15876777A
Other languages
Japanese (ja)
Inventor
Takashi Usami
Takaaki Osaki
Yuichi Morikawa
Takeo Koinuma
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP15876777A priority Critical patent/JPS5491110A/en
Publication of JPS5491110A publication Critical patent/JPS5491110A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

PURPOSE:To make it possible to make a trunk equipment including parts of contacts electronic, by giving always the voltage to contacts to obtain a wet operation in the trunk equipment of a telephone exchange. CONSTITUTION:Trunk equipment 2 includes dial pulse transmission and loop closing functions, and loop closing circuit 24 which has a high impedance in alternating current and a dial pulse transmission circuit including dial pulse transmitting contact 27 are connected to the exchange side and the junction line side, namely, main wire 3 respectively in parallel to a service line, and contacts are inserted in series to one or both service lines between both circuits. The DC voltage is always applied to main wire 3 in the station and is applied to contact 26 and cotact 27 through loop closing circuit 24 and low resistance 25 respectively, so that each contact becomes wet operation and can be made electronic.
JP15876777A 1977-12-28 1977-12-28 Trunk equipment Pending JPS5491110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15876777A JPS5491110A (en) 1977-12-28 1977-12-28 Trunk equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15876777A JPS5491110A (en) 1977-12-28 1977-12-28 Trunk equipment

Publications (1)

Publication Number Publication Date
JPS5491110A true JPS5491110A (en) 1979-07-19

Family

ID=15678884

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15876777A Pending JPS5491110A (en) 1977-12-28 1977-12-28 Trunk equipment

Country Status (1)

Country Link
JP (1) JPS5491110A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567687A (en) * 1979-06-30 1981-01-26 Sumitomo Precision Prod Co Ltd Waste water ozonizing method
JPS57100611A (en) * 1980-12-16 1982-06-22 Matsushita Electric Ind Co Ltd Level display device of tape recorder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS567687A (en) * 1979-06-30 1981-01-26 Sumitomo Precision Prod Co Ltd Waste water ozonizing method
JPS5742392B2 (en) * 1979-06-30 1982-09-08
JPS57100611A (en) * 1980-12-16 1982-06-22 Matsushita Electric Ind Co Ltd Level display device of tape recorder
JPH0118512B2 (en) * 1980-12-16 1989-04-06 Matsushita Electric Ind Co Ltd

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