JPS5789369A - Forming system for time division multiplex channel - Google Patents
Forming system for time division multiplex channelInfo
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/42—Systems providing special services or facilities to subscribers
- H04M3/56—Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities
- H04M3/561—Arrangements 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.
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)
| 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 |
-
1980
- 1980-11-25 JP JP16564280A patent/JPS5789369A/en active Pending
Cited By (3)
| 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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