JPH0246448U - - Google Patents
Info
- Publication number
- JPH0246448U JPH0246448U JP1988126047U JP12604788U JPH0246448U JP H0246448 U JPH0246448 U JP H0246448U JP 1988126047 U JP1988126047 U JP 1988126047U JP 12604788 U JP12604788 U JP 12604788U JP H0246448 U JPH0246448 U JP H0246448U
- Authority
- JP
- Japan
- Prior art keywords
- dte
- dce
- changeover switch
- clock
- switch
- 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
- 238000010586 diagram Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
Landscapes
- Time-Division Multiplex Systems (AREA)
- Communication Control (AREA)
- Maintenance And Management Of Digital Transmission (AREA)
Description
第１図はこの考案の一実施例によるマルチポー
ト切替回路のブロツク図、第２図は第１図Ａ部の
スイツチの１接点の信号の説明図、第３図は従来
のマルチポート切替スイツチ回路を示すブロツク
図である。
図において、１はＤＣＥ、２はＤＴＥ、３はク
ロツク断検出回路、４は制御回路、５はクロツク
発振器を示す。なお、図中、同一符号は同一、又
は相当部分を示す。
Fig. 1 is a block diagram of a multi-port switching circuit according to an embodiment of this invention, Fig. 2 is an explanatory diagram of the signal of one contact of the switch in section A of Fig. 1, and Fig. 3 is a conventional multi-port switching circuit. FIG. In the figure, 1 is a DCE, 2 is a DTE, 3 is a clock disconnection detection circuit, 4 is a control circuit, and 5 is a clock oscillator. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
から切替信号により接続する相手を順次変更する
マルチポート切替スイツチにおいて、ＤＣＥが接
続されていないことを検出し自動的にＤＣＥ内部
の発振器を起動しＤＴＥにクロツクを供給するこ
とを特徴とするマルチポート切替スイツチ回路。 DTE by connecting multiple DCEs and one DTE
A multi-port changeover switch that sequentially changes the connected device using a switching signal from the switch, which detects that a DCE is not connected and automatically starts an oscillator inside the DCE to supply a clock to the DTE. Changeover switch circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988126047U JPH0246448U (en) | 1988-09-26 | 1988-09-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988126047U JPH0246448U (en) | 1988-09-26 | 1988-09-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0246448U true JPH0246448U (en) | 1990-03-29 |
Family
ID=31377202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988126047U Pending JPH0246448U (en) | 1988-09-26 | 1988-09-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0246448U (en) |
-
1988
- 1988-09-26 JP JP1988126047U patent/JPH0246448U/ja active Pending