JPH01167748U - - Google Patents
Info
- Publication number
- JPH01167748U JPH01167748U JP6537688U JP6537688U JPH01167748U JP H01167748 U JPH01167748 U JP H01167748U JP 6537688 U JP6537688 U JP 6537688U JP 6537688 U JP6537688 U JP 6537688U JP H01167748 U JPH01167748 U JP H01167748U
- Authority
- JP
- Japan
- Prior art keywords
- communication line
- terminal device
- weak current
- failure
- detecting
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
Description
第１図は本考案の一実施例を示す通信回線の故
障検出装置のブロツク図である。
１：通信回線故障検出装置、２：交換機、３：
端末装置、４：通信回線、５：電源スイツチ、６
：タイマ制御回路、７：監視リレー、８，９：監
視リレーの接点、１０：判定回路、１１，１２：
ＮＡＮＤ回路の端子、１３：高抵抗、１４：正常
性判定用ホトカプラ、１５，１６：判定回路の端
子、１７：ＮＡＮＤ回路、１８：警報出力検出部
、１９：音声合成部、２０：増幅部、２１：スピ
ーカ、監視除外強制制御部、２３：電源部、２４
：誤動作防止用コンデンサ、２５：抵抗、２６：
１００Ｖ商用電源、２７：直流電源（ＯＶ）、２
８：直流電源（＋電圧）、２９：メツセージ伝送
用配線、３０：端末装置接続用リード線、３０：
通信回線（端末装置入力線）。
FIG. 1 is a block diagram of a communication line failure detection device showing an embodiment of the present invention. 1: Communication line failure detection device, 2: Exchange, 3:
Terminal device, 4: Communication line, 5: Power switch, 6
: Timer control circuit, 7: Monitoring relay, 8, 9: Monitoring relay contacts, 10: Judgment circuit, 11, 12:
Terminal of NAND circuit, 13: High resistance, 14: Photocoupler for normality determination, 15, 16: Terminal of determination circuit, 17: NAND circuit, 18: Alarm output detection section, 19: Audio synthesis section, 20: Amplification section, 21: Speaker, monitoring exclusion forced control section, 23: Power supply section, 24
: Malfunction prevention capacitor, 25: Resistor, 26:
100V commercial power supply, 27: DC power supply (OV), 2
8: DC power supply (+ voltage), 29: Message transmission wiring, 30: Lead wire for terminal device connection, 30:
Communication line (terminal device input line).
Claims (1)
の故障を検出する装置において、該端末装置に設
置され、かつタイマの指示により、定期的に上記
通信回線を引き込んで、高抵抗を通した微弱電流
を入力させる手段と、該微弱電流の変化を検出し
て、上記通信回線の故障を判定する手段と、上記
端末装置の送話および受話状態を検出して、該微
弱電流の入力を停止させる手段とを備えたことを
特徴とする通信回線の故障検出装置。 A device that detects a failure in a communication line for connecting an exchange and a terminal device is installed in the terminal device, and periodically draws in the communication line according to instructions from a timer to generate a weak current through a high resistance. means for inputting a signal, a means for detecting a change in the weak current to determine a failure of the communication line, and a means for detecting the transmitting and receiving states of the terminal device and stopping the input of the weak current. A failure detection device for a communication line, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6537688U JPH01167748U (en) | 1988-05-18 | 1988-05-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6537688U JPH01167748U (en) | 1988-05-18 | 1988-05-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01167748U true JPH01167748U (en) | 1989-11-27 |
Family
ID=31290814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6537688U Pending JPH01167748U (en) | 1988-05-18 | 1988-05-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01167748U (en) |
-
1988
- 1988-05-18 JP JP6537688U patent/JPH01167748U/ja active Pending
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