JPS5757099A - Level adjusting circuit for trunk device - Google Patents

Level adjusting circuit for trunk device

Info

Publication number
JPS5757099A
JPS5757099A JP13246580A JP13246580A JPS5757099A JP S5757099 A JPS5757099 A JP S5757099A JP 13246580 A JP13246580 A JP 13246580A JP 13246580 A JP13246580 A JP 13246580A JP S5757099 A JPS5757099 A JP S5757099A
Authority
JP
Japan
Prior art keywords
wire
adjusting circuit
level adjusting
transmission
trunk device
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
JP13246580A
Other languages
Japanese (ja)
Inventor
Shingo Wada
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP13246580A priority Critical patent/JPS5757099A/en
Publication of JPS5757099A publication Critical patent/JPS5757099A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

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

Abstract

PURPOSE:To make high-density packaging possible and to apply a trunk device to transmission levels of all telephone exchanges easily, by inserting a transmission level adjusting circuit, which is made into a hybrid integrated circuit, to the four- wire part of a two wire/four wire converting circuit. CONSTITUTION:A level adjusting circuit 6 made into a hybrid integrated circuit is inserted to a four-wire part 5 of a two wire/four wire converting circuit 4 of an analogue trunk device 3, and a level matched to the transmission level of a telephone exchange is set by switches 7 and 8. The switch 7 sets the transmission level from the line side to the side of a network 9, and the switch 8 sets the transmission level from the network side to the line side. Consequently, high-density packaging is possible, and the device is applied to transmission levels of all telephone exchanges easily.
JP13246580A 1980-09-24 1980-09-24 Level adjusting circuit for trunk device Pending JPS5757099A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13246580A JPS5757099A (en) 1980-09-24 1980-09-24 Level adjusting circuit for trunk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13246580A JPS5757099A (en) 1980-09-24 1980-09-24 Level adjusting circuit for trunk device

Publications (1)

Publication Number Publication Date
JPS5757099A true JPS5757099A (en) 1982-04-06

Family

ID=15082000

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13246580A Pending JPS5757099A (en) 1980-09-24 1980-09-24 Level adjusting circuit for trunk device

Country Status (1)

Country Link
JP (1) JPS5757099A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61264891A (en) * 1985-05-17 1986-11-22 Nec Corp Key telephone set

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61264891A (en) * 1985-05-17 1986-11-22 Nec Corp Key telephone set

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