JPS587091B2 - Subscriber line monitoring method - Google Patents
Subscriber line monitoring methodInfo
- Publication number
- JPS587091B2 JPS587091B2 JP52039193A JP3919377A JPS587091B2 JP S587091 B2 JPS587091 B2 JP S587091B2 JP 52039193 A JP52039193 A JP 52039193A JP 3919377 A JP3919377 A JP 3919377A JP S587091 B2 JPS587091 B2 JP S587091B2
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- signal
- line
- transmission line
- subscriber line
- 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.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/22—Arrangements for supervision, monitoring or testing
- H04M3/26—Arrangements for supervision, monitoring or testing with means for applying test signals or for measuring
- H04M3/28—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor
- H04M3/30—Automatic routine testing ; Fault testing; Installation testing; Test methods, test equipment or test arrangements therefor for subscriber's lines, for the local loop
Description
【発明の詳細な説明】
本発明は、加入者線局内装置と加入者線終端装置間で伝
送路を介してデータ信号の送信．受信を行うデータ伝送
方式において、伝送路の障害を監視する監視方式に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the transmission of data signals between a subscriber line in-office device and a subscriber line termination device via a transmission path. The present invention relates to a monitoring method for monitoring failures in a transmission path in a data transmission method for receiving data.
このような加入者線の監視方式としてデータ信号のレベ
ルを監視することにより加入者線の障害を検知する方法
が考えられるが、この方式によれば加入者線終端装置（
以下終端装置と記す）の障害、例えば終端装置の電源断
のような場合と伝送路の障害との区別をつけることがで
きない。One possible method for monitoring such subscriber lines is to detect faults in the subscriber line by monitoring the data signal level, but according to this method, the subscriber line termination device (
It is not possible to distinguish between a failure of a terminal device (hereinafter referred to as a terminating device), such as a power outage of the terminating device, and a failure of a transmission path.
本発明は、上記の如く監視方式の欠点を解消するもので
、加入者線局内装置と加入者線終端装置間で、第１、第
２の伝送路から成る送信用伝送路、第３、第４の伝送路
から成る受信用伝送路を介してデータの送受を行うデー
タ伝送方式において、第１の伝送路、第２の伝送路間、
あるいは第３の伝送路、第４の伝送路間のいずれか一方
に直流信号重畳手段、第１の直流信号検出手段を直列に
接続し、他方に第２の直流信号検出手段を接続し、該加
入者終端装置において、該直流信号重畳手段に対して該
第１、第２、第３、第４の伝送路が直列接続されるよう
に接続し、該第１の直流信号検出手段並びに該第２の直
流信号検出手段により該直流信号を検出することにより
該送信用伝送路並びに該受信用伝送路の障害を監視する
ことを特徴とする。The present invention solves the drawbacks of the monitoring system as described above, and includes a transmission transmission path consisting of a first and second transmission path, a third transmission path, a third transmission path, and a In a data transmission method in which data is sent and received via a reception transmission path consisting of four transmission paths, between the first transmission path and the second transmission path,
Alternatively, the DC signal superimposing means and the first DC signal detecting means are connected in series to one of the third transmission line and the fourth transmission line, and the second DC signal detecting means is connected to the other. In the subscriber terminal device, the first, second, third, and fourth transmission lines are connected in series to the DC signal superimposing means, and the first DC signal detecting means and the first DC signal superimposing means are connected in series. The present invention is characterized in that failures in the transmitting transmission line and the receiving transmission line are monitored by detecting the DC signal by the second DC signal detecting means.
以下、図にもとづいて本発明を詳細に説明する。Hereinafter, the present invention will be explained in detail based on the drawings.
図は本発明の一実施例を示しだもので、１は加入者線終
端装置、２は加入者線局内装置、３は終端装置側受信器
、４は終端装置側送信器、５は局内装置側送信器、６は
局内装置側受信器、７は電源、８は定電流回路、９−１
． ９−２ ． １ １− １，１１−２は伝送路、
１０−１．１０−２は折り返し線路、１２−１ ． １
２−２は電流検出回路、１３ぱ交流阻止用チョークコイ
ル、１４は直流阻止用コンデンサ、１５はオア回路であ
る。The figure shows an embodiment of the present invention, in which 1 is a subscriber line terminating device, 2 is a subscriber line in-office device, 3 is a receiver on the terminating device side, 4 is a transmitter on the terminating device side, and 5 is an in-office device. side transmitter, 6 is an in-office device side receiver, 7 is a power supply, 8 is a constant current circuit, 9-1
．． 9-2. 1 1-1, 11-2 are transmission lines,
10-1.10-2 is a turning track, 12-1. 1
2-2 is a current detection circuit, 13 is an AC blocking choke coil, 14 is a DC blocking capacitor, and 15 is an OR circuit.
以下にその動作を説明する。The operation will be explained below.
電源７から電力を供給された定電流回路８により直流信
号を重畳し、伝送路９−１に送出する。A constant current circuit 8 supplied with power from a power source 7 superimposes a DC signal and sends it to a transmission line 9-1.
この直流信号は終端装置側受信器のトランスに挿入され
た直流阻止用コンデンサに阻止され、チョークコイル１
３を介して折り返し線路１０−１に流れる。This DC signal is blocked by a DC blocking capacitor inserted in the transformer of the terminal device side receiver, and the choke coil 1
3 to the return line 10-1.
そして折り返されて伝送路１１−１に流れ、局内装置側
受信器のチョークコイル１３を介して電流検出回路１２
−２に入力する。Then, it is turned back and flows into the transmission line 11-1, and the current detecting circuit 12 passes through the choke coil 13 of the receiver on the side of the station equipment.
-2.
電流検出回路１２−２は直流信号を検出することにより
障害の監視を行う。The current detection circuit 12-2 monitors faults by detecting DC signals.
更に直流信号は伝送路１１−２、折り返し線路１１−２
、伝送路９−２を通って電流検出回路１２−１に入力し
、電流検出回路１２−１は直流信号を検出することによ
り障害の監視を行う。Furthermore, the DC signal is transmitted through the transmission line 11-2 and the return line 11-2.
, and is inputted to the current detection circuit 12-1 through the transmission line 9-2, and the current detection circuit 12-1 monitors a fault by detecting a DC signal.
ここで、伝送路９−１ ．９−２，１１−１ ．１１−
２の断線障害が生じた場合は、電流検出回路１２−１及
び１２−２により直流信号を検出できないことにより障
害の検知ができる。Here, the transmission line 9-1. 9-2, 11-1. 11-
If the disconnection fault of No. 2 occurs, the fault can be detected because the current detection circuits 12-1 and 12-2 cannot detect the DC signal.
さて、伝送路９−１と９−２の間で短絡障害が生じた場
合、電流検出回路１２−１において直流信号が検出でき
なくなり、短絡障害を検知できる。Now, if a short circuit fault occurs between the transmission lines 9-1 and 9-2, the current detection circuit 12-1 will no longer be able to detect a DC signal, and the short circuit fault can be detected.
同様に伝送路１１〜１と１１−２の間で短絡障害が生じ
たときは電流検出回路１２−２において短絡障害を検知
でき、その信号をオア回路１５を介してアラーム信号と
してとりだす。Similarly, when a short circuit fault occurs between the transmission lines 11-1 and 11-2, the short circuit fault can be detected in the current detection circuit 12-2, and the signal thereof is taken out as an alarm signal via the OR circuit 15.
以上の如く本発明によれば断線障害のみならず、短絡障
害も局内装置において監視できるものである。As described above, according to the present invention, not only disconnection faults but also short circuit faults can be monitored in the in-office equipment.
本発明によれば加入者線局内装置側と加入者線終端装置
側を結ぶ伝送路の障害を、加入者の報告をまたずに監視
できるもので、局内側において保守しうるものである。According to the present invention, failures in the transmission line connecting the subscriber line internal equipment side and the subscriber line terminal equipment side can be monitored without having to be reported by subscribers, and maintenance can be performed inside the office.
図は本発明の実施例である。
図において、１は加入者線終端装置、２は加入者線局内
装置、３は終端装置側受信器、４は終端装置側送信器、
５は局内装置側送信器、６は局内装置側受信器、７は電
源、８は定電流回路、９−１， ９−２ ． １ １−
１．１１−２は伝送路、１ ０−１ ． １ ０−２は
折り返し線路、１２−１．１２−２は電流検出回路、１
３は交流附止用チョークコイル、１４は直流阻止用コン
デンサ、１５はオア回路である。The figure shows an embodiment of the invention. In the figure, 1 is a subscriber line terminating device, 2 is a subscriber line in-office device, 3 is a receiver on the terminating device side, 4 is a transmitter on the terminating device side,
5 is a transmitter on the side of the station equipment, 6 is a receiver on the side of the station equipment, 7 is a power supply, 8 is a constant current circuit, 9-1, 9-2 . 1 1-
1.11-2 is a transmission line, 1 0-1 . 1 0-2 is a return line, 12-1.12-2 is a current detection circuit, 1
3 is a choke coil for blocking AC, 14 is a capacitor for blocking DC, and 15 is an OR circuit.
Claims (1)
第２の伝送路から成る送信用伝送路、第３、第４の伝送
路から成る受信用伝送路を介してデータの送受を行うデ
ータ伝送方式において、第１の伝送路・第２の伝送路間
、あるいは第３の伝送路・第４の伝送路間のいずれか一
方に直流信号重畳手段、第１の直流信号検出手段を直列
に接続し、他方に第２の直流信号検出手段を接続し、該
加入者終端装置において、該直流信号重畳手段に対して
該第１、第２、第３、第４の伝送路が直列接続されるよ
うに接続し、該第１の直流信号検出手段並びに該第２の
直流信号検出手段により該直流信号を検出することによ
り該送信用伝送路並びに該受信用伝送路の障害を監視す
ることを特徴とする加入者線監視方式。1 Between the subscriber line in-office equipment and the subscriber line terminating equipment,
In a data transmission method in which data is sent and received via a transmission transmission line for transmission consisting of a second transmission line and a transmission line for reception consisting of third and fourth transmission lines, the first transmission line and the second transmission line A DC signal superimposing means and a first DC signal detecting means are connected in series to one of the transmission lines or between the third transmission line and the fourth transmission line, and a second DC signal detection means is connected to the other. , in the subscriber terminal device, the first, second, third, and fourth transmission lines are connected in series to the DC signal superimposing means, and the first DC signal detection means and A subscriber line monitoring system characterized in that failures in the transmitting transmission line and the receiving transmission line are monitored by detecting the DC signal by the second DC signal detecting means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52039193A JPS587091B2 (en) | 1977-04-06 | 1977-04-06 | Subscriber line monitoring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP52039193A JPS587091B2 (en) | 1977-04-06 | 1977-04-06 | Subscriber line monitoring method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS53124005A JPS53124005A (en) | 1978-10-30 |
| JPS587091B2 true JPS587091B2 (en) | 1983-02-08 |
Family
ID=12546271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP52039193A Expired JPS587091B2 (en) | 1977-04-06 | 1977-04-06 | Subscriber line monitoring method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS587091B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62180284U (en) * | 1986-04-28 | 1987-11-16 | ||
| JPH01150798A (en) * | 1987-12-08 | 1989-06-13 | Hitachi Ltd | Heat transfer pipe support structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3018950B2 (en) * | 1995-08-28 | 2000-03-13 | 日本電気株式会社 | LAN communication device |
-
1977
- 1977-04-06 JP JP52039193A patent/JPS587091B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62180284U (en) * | 1986-04-28 | 1987-11-16 | ||
| JPH01150798A (en) * | 1987-12-08 | 1989-06-13 | Hitachi Ltd | Heat transfer pipe support structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS53124005A (en) | 1978-10-30 |
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