JPS63194457A - Subscriber line monitoring system - Google Patents
Subscriber line monitoring systemInfo
- Publication number
- JPS63194457A JPS63194457A JP2624587A JP2624587A JPS63194457A JP S63194457 A JPS63194457 A JP S63194457A JP 2624587 A JP2624587 A JP 2624587A JP 2624587 A JP2624587 A JP 2624587A JP S63194457 A JPS63194457 A JP S63194457A
- Authority
- JP
- Japan
- Prior art keywords
- data
- channel
- test
- subscriber line
- main channel
- 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
- 238000012544 monitoring process Methods 0.000 title claims description 4
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 238000004891 communication Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000006870 function Effects 0.000 abstract description 5
- 230000004931 aggregating effect Effects 0.000 abstract 1
- 230000015654 memory Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Landscapes
- Monitoring And Testing Of Exchanges (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、通信中の加入者線監視方式に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a subscriber line monitoring system during communication.
従来１通信中の加入者線監視方式については、ＤＤＸ統
合保守システム（信学技報５Ｅ８４−１１０ Ｐ１９
〜２４．１９８４年１１月）において論じられている。Regarding the subscriber line monitoring method during conventional 1 communication, the DDX integrated maintenance system (IEICE Technical Report 5E84-110 P19
~24.November 1984).
本方式では、専用のディジタル加入者線伝送方式を用い
、宅内装置の宅内回線終端装置には、パリティ発生回路
とエラー転送回路を、交換局の各局内回線終端装置には
パリティ誤り検出回路とエラー受信回路を設け、上下両
方向の誤り検出を行うものである。This system uses a dedicated digital subscriber line transmission system, with a parity generation circuit and an error transfer circuit installed in the in-home line termination equipment of the in-home equipment, and a parity error detection circuit and error transfer circuit installed in each in-office line termination unit of the exchange. A receiving circuit is provided to detect errors in both the up and down directions.
上記従来技術では、専用の加入者線伝送方式を使用し、
各宅内回線終端装置にパリティ発生回路及びエラー転送
回路が、また局内回線終端装置にパリティ誤り検出回路
及びエラー受信回路が必要であるばかりでなく、パリテ
ィ・チェックによるため誤りの程度が不明であるという
問題があった。The above conventional technology uses a dedicated subscriber line transmission system,
Not only is it necessary to have a parity generation circuit and an error transfer circuit in each in-house line termination device, and a parity error detection circuit and an error reception circuit in each in-house line termination device, but it is also necessary to have a parity check, which means that the degree of error is unknown. There was a problem.
本発明の目的は、専用の加入者線伝送方式を用いず、ま
た宅内回線終端装置、局内回線終端装置に上記回路を設
けることなく、誤りの程度を測定することにある。An object of the present invention is to measure the degree of error without using a dedicated subscriber line transmission system and without providing the above-mentioned circuit in an in-home line termination device or an in-office line termination device.
上記目的は、交換局に加入者線を監視する試験装置と任
意の宅内装置と試験装置のパスを閉成するを設け、試験
装置より通信中の主又は副チャネルのいずれか空の情報
チャネルにスイッチを介して試験データを送出し、宅内
装置にて既知の技術により同一チャネルに試験データを
交換装置側に折返し、試験装置において送出した試験デ
ータと該折返された試験データを比較して誤り率を測定
すると共に、長期間に渡り該宅内装置に対する複数の通
信に対して誤り率を積分し測定精度を上げることにより
達成される。The purpose of the above is to install a test device in the switching center that monitors the subscriber line and to close the path between the test device and any in-home device, and connect the test device to either the main or secondary channel in use, which is an empty information channel. The test data is sent out via the switch, the test data is returned to the switching device on the same channel using known technology in the home equipment, and the error rate is determined by comparing the test data sent out by the test equipment and the returned test data. This is achieved by measuring the error rate and integrating the error rate for multiple communications to the home device over a long period of time to improve measurement accuracy.
交換局に試験装置とスイッチを設け、任意の宅内装置と
試験装置を接続する機能を設け、交換局よりの指示によ
る宅内装置での試験装置よりの試験データを折返し試験
装置にて誤り検出をする事により試験装置に誤り検出機
能を集約する事により宅内回線終端装置、局内回線終端
装置の個々に誤り検出用の回路を不要とする事ができる
。A test device and a switch are installed at the exchange, and a function is provided to connect any in-home device to the test device, and the test data from the test device is returned to the in-home device according to instructions from the exchange, and errors are detected by the test device. By consolidating the error detection function in the test equipment, it is possible to eliminate the need for error detection circuits for each of the in-home line termination device and the in-office line termination device.
また、試験データの転送ルートとして通信時の主又は副
チャネルのいずれかの空チャネルを利用する事により、
専用の加入者線伝送方式を設ける必要はない。In addition, by using either the main or secondary channel during communication as the test data transfer route,
There is no need to provide a dedicated subscriber line transmission system.
以下、本発明の実施例を第１図、第２図を用いて説明す
る。第１図は、本実施例のブロック図で、同図において
、１は交換局、３は加入者線の誤り率を測定する試験装
置、 Ｔｏ＝Ｔｍは宅内装置。Embodiments of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a block diagram of this embodiment. In the figure, 1 is an exchange, 3 is a test device for measuring the error rate of subscriber lines, and To=Tm is an in-home device.
Ｒｏ＝Ｒｍは宅内装置内の折返し回路、ＬＯ〜Ｌｍは加
入者線、２は試験装置４と任意の宅内装置との通信パス
を設定するスイッチ、４は中央制御装置である。第２図
は、第１図の試験装置３のブロック図であり、同図にお
いて、ＰＧｏ＝ＰＧｎはパターン発生器、ＰＣｏ−ＰＣ
ｎはパターン検出器、ＭＯ〜Ｍｎはメモリであり、試験
装置３は同時にｎ個の宅内装置と接続可能である。ここ
で、ｍ＞ｎであり必ずしも各宅内装置が試験装置３と接
続が可能である必要はない。ここではｍ ） ｎとし、
試験装置４との接続対象の宅内装置は、障害申告があっ
た宅内装置又は予防保全のため定期的にｎ台の宅内装置
が接続されるものとする。Ro=Rm is a return circuit within the home device, LO to Lm are subscriber lines, 2 is a switch for setting a communication path between the test device 4 and any home device, and 4 is a central control device. FIG. 2 is a block diagram of the test apparatus 3 of FIG. 1, in which PGo=PGn is a pattern generator, PCo-PC
n is a pattern detector, MO to Mn are memories, and the test device 3 can be connected to n in-home devices at the same time. Here, since m>n, it is not necessarily necessary that each in-home device can be connected to the test device 3. Here, m ) n,
It is assumed that the in-home devices to be connected to the test device 4 are the in-home devices that have reported a failure, or the n in-home devices that are periodically connected for preventive maintenance.
各宅内装置と交換局１は加入者線りを通じて主チャネル
と副チャネルの２つの情報チャネルで通信を行うものと
する。今、試験対象の宅内装置Ｔ１が発信又は着信によ
り通信中の状態に入ると、中央処理装置４はスイッチ２
に対して、宅内装置Ｔｉに副チャネルの折返し指示を出
すと共に、スイッチ２を介して宅内装置Ｔｉの副チャネ
ルと試験装置３の中の前もって決めたパターン発生器Ｐ
Ｇｉとパターン検出器ＰＣｉとのパスを閉成し、パター
ン発生器ＰＧｉとパターン検出器ＰＣｉとに起動をかけ
る。スイッチ２に与えられた副チャネル折返し指示は、
スイッチ２、加入者線Ｌ１を介して宅内袋［Ｔｉに送ら
れ、これを受けた宅内装置Ｔｉ内折返し回路Ｒｉは交換
局１より送られた副チャネル情報を副チャネルを介して
交換局１に折返す状態となる。この状態で、パターン発
生器ＰＧｉより試験データを発生し、スイッチ２を介し
て、加入者′！ｆＡＬｉ上の副チャネルに該試験データ
を送出すると、該試験データは該折返し回路Ｒｉにて副
チャネルに折返され、加入者線Ｌｉ、スイッチ２を介し
て、パターン検出器ＰＣｉに転送される。パターン検出
器ＰＣｉは、パターン発生器ＰＧｉが送出したデータと
折返されたデータとを比較し、ビット誤り回数を算出す
る。この動作は、宅内装置Ｔｉの通信が終了するまで続
けられる。通信が終了すると中央処理装置３は、宅内装
置Ｔｉへの副チャネル折返し指示及び、スイッチ２のパ
スを開放し、パターン発生器ＰＧｉ、 パターン検出
器ＰＣｉに停止を指示する。これによりパターン発生器
ＰＧｉは試験データの送出を停止し、パターン検出器Ｐ
Ｃｉはデータ比較を停止すると共に、メモリＭｉより宅
内装置Ｔｉの前回までの通信中のビット誤り回数を読み
出し、今回のビット誤り回数を加算してメモリＭｉに書
込む。一方、パターン発生器ＰＧｉは今回までに送出し
たビット数を記憶し、これが決められたビット数となる
と、中央処理装置３に通知すると共に、試験データの送
出を停止し、パターン検出器の動作を停止し、前述のよ
うに最新のビット誤り回数がメモリＭｉに残される。通
知を受けた中央処理装置３は、メモリＭｉの内容を読み
、加入者線上のビット誤り率を知る。この時、宅内袋ｗ
Ｔｉに対する試験は終了し、他の宅内袋［Ｔｉにパター
ン発生器ＰＧｉ、パターン検出器ＰＣｉ、メモリＭｉが
割当てられる。It is assumed that each in-home device and the exchange 1 communicate through two information channels, a main channel and a subchannel, through a subscriber line. Now, when the home device T1 to be tested enters a communication state due to an outgoing or incoming call, the central processing unit 4 switches to the switch 2.
In response to this, an instruction is sent to the home device Ti to turn back the sub-channel, and the sub-channel of the home device Ti and a predetermined pattern generator P in the test device 3 are transmitted via the switch 2.
The path between Gi and pattern detector PCi is closed, and pattern generator PGi and pattern detector PCi are activated. The subchannel return instruction given to switch 2 is
The switch 2 sends the in-home bag [Ti] via the subscriber line L1, and the return circuit Ri within the in-home device Ti receives the sub-channel information sent from the exchange 1 to the exchange 1 via the sub-channel. It will turn around. In this state, test data is generated from the pattern generator PGi and sent to the subscriber'! When the test data is sent to the subchannel on fALi, the test data is looped back to the subchannel by the loopback circuit Ri and transferred to the pattern detector PCi via the subscriber line Li and the switch 2. The pattern detector PCi compares the data sent by the pattern generator PGi with the returned data and calculates the number of bit errors. This operation continues until the communication of the home device Ti ends. When the communication is completed, the central processing unit 3 instructs the in-home device Ti to turn back the subchannel, opens the path of the switch 2, and instructs the pattern generator PGi and pattern detector PCi to stop. As a result, the pattern generator PGi stops sending test data, and the pattern detector P
Ci stops the data comparison, reads the number of bit errors during the previous communication of the home device Ti from the memory Mi, adds the current number of bit errors, and writes the result to the memory Mi. On the other hand, the pattern generator PGi memorizes the number of bits sent out so far, and when this reaches the predetermined number of bits, it notifies the central processing unit 3, stops sending out the test data, and stops the operation of the pattern detector. The most recent number of bit errors is left in the memory Mi as described above. The central processing unit 3 that has received the notification reads the contents of the memory Mi and learns the bit error rate on the subscriber line. At this time, the home bag lol
The test for Ti is completed, and the pattern generator PGi, pattern detector PCi, and memory Mi are assigned to another in-house bag [Ti.
ここでは、主チャネルでの通信を例に示したが、副チャ
ネルでの通信においては折返し回路Ｒｉの折返し対象が
主チャネルとなるだけで動作的には同様である。Here, communication on the main channel is shown as an example, but in communication on the sub-channel, the operation is the same except that the return target of the return circuit Ri is the main channel.
本発明によれば、試験機能をスイッチにより試験装置に
集約すると共に、通信中の空チャネルを用いて通信中の
加入者線のビット誤り率を測定できるので、専用の加入
者線伝送方式を用いる必要がなく、また宅内回線終端装
置、局内回線終端装置に試験機能を設けることなく、加
入者線上のビット誤り率を測定できる効果がある。According to the present invention, the test functions are integrated into the test equipment using a switch, and the bit error rate of the subscriber line during communication can be measured using an empty channel during communication, so a dedicated subscriber line transmission method is used. There is an effect that the bit error rate on the subscriber line can be measured without having to provide a test function to the in-home line termination device or the in-office line termination device.
第１図は本発明の一実施例の全体ブロック図、第２図は
本実施例の試験装置のブロック図である。
１・・・交換局、２・・・スイッチ、３・・・試験装置
。
４・・・中央制御装置、Ｔ ｏ ＝ Ｔ ａｈ・・・宅
内装置、ＲＯ〜Ｒｍ・・・折返し回路、ＬＯ〜ＬＩ１１
・・加入者線、ＰＧｏ〜ＰＧｎ−パターン発生器、Ｐ
Ｃｏ−Ｐ Ｃｎ・＝パターン検出器。
、＜ニー、、、、FIG. 1 is an overall block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a test apparatus of this embodiment. 1... Switching station, 2... Switch, 3... Test equipment. 4...Central control device, T o = Tah... In-home device, RO~Rm... Return circuit, LO~LI11
・・Subscriber line, PGo~PGn-pattern generator, P
Co-P Cn=pattern detector. ,＜nee,,,,
Claims (1)
ルの情報チャネルで通信する宅内装置と交換局とから成
る通信システムに於いて、宅内装置に交換局よりの主チ
ャネルデータ又は副チャネルデータを交換局に折返す折
返し回路、交換局には主チャネル又は副チャネルに試験
データを送出し、該折返し回路で折返された主チャネル
データ又は副チャネルデータと試験データにより誤り検
出を行うと共に誤り検出情報を積分し記憶する試験装置
と、任意の該折返し回路と該試験装置とのパスを閉成す
るスイッチを設け、主チャネルで通信中は宅内装置に対
し該試験装置はスイッチを介して副チャネルへ試験デー
タを送出し、該折返し回路で折返された副チャネルデー
タと試験データとから試験装置にて誤り検出を行い、同
様に副チャネルで通信中は主チャネルへの試験データと
折返しの主チャネルデータとで誤り検出を行い、誤り検
出の情報を各通信毎に積分し記憶する事を特徴とする加
入者線監視方式。1. In a communication system consisting of a switching center and an in-home device that communicates through a main channel and a sub-channel information channel via a digital subscriber line, the main channel data or sub-channel data from the switching center is exchanged with the in-home device. A loopback circuit that loops back to the exchange station sends test data to the main channel or subchannel, and performs error detection using the main channel data or subchannel data returned by the loopback circuit and the test data, and also transmits error detection information. A test device that integrates and stores it, and a switch that closes a path between the loopback circuit and the test device are provided, and during communication on the main channel, the test device tests the subchannel via the switch for the home device. The data is transmitted, and the test equipment detects errors from the sub-channel data and test data that are returned by the return circuit. Similarly, while communicating on the sub-channel, the test data to the main channel and the returned main channel data are A subscriber line monitoring system characterized in that error detection is carried out at , and error detection information is integrated and stored for each communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2624587A JPS63194457A (en) | 1987-02-09 | 1987-02-09 | Subscriber line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2624587A JPS63194457A (en) | 1987-02-09 | 1987-02-09 | Subscriber line monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63194457A true JPS63194457A (en) | 1988-08-11 |
Family
ID=12187908
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2624587A Pending JPS63194457A (en) | 1987-02-09 | 1987-02-09 | Subscriber line monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63194457A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100408077B1 (en) * | 2001-06-20 | 2003-12-03 | 주영정보통신 주식회사 | T3 channel service unit with test pattern device |
| KR100487531B1 (en) * | 2002-09-16 | 2005-05-03 | 엘지전자 주식회사 | Apparatus and Method for Testing Line beween System and Terminal |
-
1987
- 1987-02-09 JP JP2624587A patent/JPS63194457A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100408077B1 (en) * | 2001-06-20 | 2003-12-03 | 주영정보통신 주식회사 | T3 channel service unit with test pattern device |
| KR100487531B1 (en) * | 2002-09-16 | 2005-05-03 | 엘지전자 주식회사 | Apparatus and Method for Testing Line beween System and Terminal |
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