JPS57127354A - Digital switchboard cord trunk circuit - Google Patents

Digital switchboard cord trunk circuit

Info

Publication number
JPS57127354A
JPS57127354A JP1251981A JP1251981A JPS57127354A JP S57127354 A JPS57127354 A JP S57127354A JP 1251981 A JP1251981 A JP 1251981A JP 1251981 A JP1251981 A JP 1251981A JP S57127354 A JPS57127354 A JP S57127354A
Authority
JP
Japan
Prior art keywords
switchboard
multiplexed
signal sent
trunk circuit
subscriber under
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
JP1251981A
Other languages
Japanese (ja)
Other versions
JPS6151459B2 (en
Inventor
Toru Jinbo
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 JP1251981A priority Critical patent/JPS57127354A/en
Publication of JPS57127354A publication Critical patent/JPS57127354A/en
Publication of JPS6151459B2 publication Critical patent/JPS6151459B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To reduce the quantity of the hardware, by inserting a multiplexed switchboard cord trunk circuit to a multiplexed digital channel. CONSTITUTION:The analog signal sent from a transmitter microphone T of a switchboard POS301 receives an A/D conversion 310 and then a multiplexed MUX320 to be transmitted to a subscriber under a reception process via a sending speech level controller 331 within a switchboard cord trunk PCT330. At the same time, a digital mixture 334 is carried out between the signal sent from the subscriber under a reception process and the monitor signal sent from a subscriber under calling via the controllers 332 and 333. These mixed signals are then separated from each other by a multiplexing device 321 and according to the switchboard to be applied to a telephone receiver R of the POS301. The same process is given to both a microphone T and receiver R of a POS302.
JP1251981A 1981-01-30 1981-01-30 Digital switchboard cord trunk circuit Granted JPS57127354A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1251981A JPS57127354A (en) 1981-01-30 1981-01-30 Digital switchboard cord trunk circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1251981A JPS57127354A (en) 1981-01-30 1981-01-30 Digital switchboard cord trunk circuit

Publications (2)

Publication Number Publication Date
JPS57127354A true JPS57127354A (en) 1982-08-07
JPS6151459B2 JPS6151459B2 (en) 1986-11-08

Family

ID=11807586

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1251981A Granted JPS57127354A (en) 1981-01-30 1981-01-30 Digital switchboard cord trunk circuit

Country Status (1)

Country Link
JP (1) JPS57127354A (en)

Also Published As

Publication number Publication date
JPS6151459B2 (en) 1986-11-08

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