JPS5789369A - Forming system for time division multiplex channel - Google Patents

Forming system for time division multiplex channel

Info

Publication number
JPS5789369A
JPS5789369A JP16564280A JP16564280A JPS5789369A JP S5789369 A JPS5789369 A JP S5789369A JP 16564280 A JP16564280 A JP 16564280A JP 16564280 A JP16564280 A JP 16564280A JP S5789369 A JPS5789369 A JP S5789369A
Authority
JP
Japan
Prior art keywords
circuit
buffer
time division
signal
read
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
JP16564280A
Other languages
Japanese (ja)
Inventor
Tadashi Murayama
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP16564280A priority Critical patent/JPS5789369A/en
Publication of JPS5789369A publication Critical patent/JPS5789369A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M3/00Automatic or semi-automatic exchanges
    • H04M3/42Systems providing special services or facilities to subscribers
    • H04M3/56Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
    • H04M3/561Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities by multiplexing

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)

Abstract

PURPOSE:To make the conference telephone operation possible, by rotting operations of three buffer memories successively in frame units to perform the write, the operation, and the read and by inserting a tone signal to the time division multiplexed signal. CONSTITUTION:After selected in channel units by a switching circuit 11, the time division multiplexed signal outputted from a multiplexing circuit MPX1 and the tone signal generated by a tone generating circuit 7 are supplied to a buffer circuit 12 having three buffer memories and are written one buffer memory. These buffer memories are switched successively by a memory switching circuit SEL, and the write of the output signal of the switching circuit 11, the conference telephone operation, and the read are performed while rotating buffer memories successively. The read signal is operated as the tone signal as the operation element by a conference telephone operation circuit 14 and is written again in one buffer memory by the address designation of an operation control memory 15.
JP16564280A 1980-11-25 1980-11-25 Forming system for time division multiplex channel Pending JPS5789369A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16564280A JPS5789369A (en) 1980-11-25 1980-11-25 Forming system for time division multiplex channel

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16564280A JPS5789369A (en) 1980-11-25 1980-11-25 Forming system for time division multiplex channel

Publications (1)

Publication Number Publication Date
JPS5789369A true JPS5789369A (en) 1982-06-03

Family

ID=15816235

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16564280A Pending JPS5789369A (en) 1980-11-25 1980-11-25 Forming system for time division multiplex channel

Country Status (1)

Country Link
JP (1) JPS5789369A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957558A (en) * 1982-06-24 1984-04-03 ウエスターン エレクトリック カムパニー,インコーポレーテッド Linear time division multiplex conference device
JPS6190563A (en) * 1984-10-11 1986-05-08 Iwatsu Electric Co Ltd Conference calling system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5957558A (en) * 1982-06-24 1984-04-03 ウエスターン エレクトリック カムパニー,インコーポレーテッド Linear time division multiplex conference device
JPS6190563A (en) * 1984-10-11 1986-05-08 Iwatsu Electric Co Ltd Conference calling system
JPH0316067B2 (en) * 1984-10-11 1991-03-04 Iwatsu Electric Co Ltd

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