JPH0313154A - Subscriber circuit return loss measuring system - Google Patents

Subscriber circuit return loss measuring system

Info

Publication number
JPH0313154A
JPH0313154A JP15011489A JP15011489A JPH0313154A JP H0313154 A JPH0313154 A JP H0313154A JP 15011489 A JP15011489 A JP 15011489A JP 15011489 A JP15011489 A JP 15011489A JP H0313154 A JPH0313154 A JP H0313154A
Authority
JP
Japan
Prior art keywords
circuit
subscriber circuit
return loss
subscriber
oscillator
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
Application number
JP15011489A
Other languages
Japanese (ja)
Inventor
Takahiko Kikukawa
隆彦 菊川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP15011489A priority Critical patent/JPH0313154A/en
Publication of JPH0313154A publication Critical patent/JPH0313154A/en
Pending legal-status Critical Current

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
    • H04M3/301—Circuit arrangements at the subscriber's side of the line

Landscapes

  • Monitoring And Testing Of Exchanges (AREA)

Abstract

PURPOSE:To prevent a subscriber circuit efficiently by connecting a 4-line type trunk circuit through a call switch to a measuring subscriber circuit which is equipped with a termination circuit, connecting an oscillator and a receiver through a jack for measuring instrument and measuring a return loss. CONSTITUTION:When a command is inputted form a teletypewriter 7, according to the instruction of an exchange control circuit 6 to control a call switch 3 of an exchange, a subscriber circuit 2 equipped with a termination circuit 1 is connected with a 4-line type trunk circuit 5 equipped with a jack 8 for measuring instrument to connect the oscillator and receiver. Next, a signal is outputted form the oscillator, which is connected to the jack 8 for measuring instrument in one side, and a returned signal part is received from the subscriber circuit 2 to the receiver in the other side. Then, the return loss is measured. Thus, the subscriber circuit is not vainly used and without necessity for correcting the loss, the return loss of the subscriber circuit can be measured.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は電話交換機における加入者回路リターンロス測
定方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for measuring subscriber circuit return loss in a telephone exchange.

〔従来の技術〕[Conventional technology]

従来の加入者回路リターンロス測定方式においては、第
２図に示すように、２つの加入者回路２を通話スイッチ
３を介して接続し、一方を終端回路１により適切インピ
ーダンスで終端し、かつ他方に発振器及び受信器４を接
続して測定を行なっていた。In the conventional subscriber circuit return loss measurement method, as shown in FIG. The measurement was performed by connecting an oscillator and receiver 4 to the oscillator and receiver 4.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来の加入者回路リターンロス測定方式におい
ては、発振器及び受信器を接続する側の加入者回路は運
用状態にあるものを使う必要があるなめ、この測定を行
なうことにより、１加入者回路分の実使用が制限される
。また、発振器及び受信器側の加入者回路内のハイブリ
ッド回路によりロスが生じるため、リターンロス測定時
にはロス補正を必要とする。In the conventional subscriber circuit return loss measurement method described above, it is necessary to use the subscriber circuit on the side that connects the oscillator and receiver in an operational state. Actual use of minutes is limited. In addition, loss is generated by the oscillator and the hybrid circuit in the subscriber circuit on the receiver side, so loss correction is required when measuring return loss.

〔課題を解決するための手段〕[Means to solve the problem]

本発明の加入者回路リターンロス測定方式は終端回路を
有する測定加入者回路に通話スイッチを介して４線式ト
ランク回路を接続し、このトランク回路に測定器用ジャ
ックを介して発振器及び受信器を接続し、前記加入者回
路のリターンロスを測定する構成である。The subscriber circuit return loss measurement method of the present invention connects a 4-wire trunk circuit to a measuring subscriber circuit having a termination circuit via a call switch, and connects an oscillator and a receiver to this trunk circuit via a measuring instrument jack. and is configured to measure the return loss of the subscriber circuit.

〔実施例〕〔Example〕

次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.

本発明の一実施例を示す第１図において、テレタイプラ
イタ７からコマンドを入力すると、交換機の通話スイッ
チ３を制御する交換機制御回路６の指示により、終端回
路１を有する加入者回路２と発振器及び受信器を接続す
るための測定器用ジャック８を有する４線式のトランク
回路５とを接続する。次に、測定器用ジャック８の一方
に接続される発振器から信号を送出し、他方の受信器で
加入者回路２からのリターン分を受信し、リターンロス
の測定を行な゛う。In FIG. 1 showing an embodiment of the present invention, when a command is input from a teletypewriter 7, a subscriber circuit 2 having a termination circuit 1 and an oscillator are and a four-wire trunk circuit 5 having a measuring instrument jack 8 for connecting a receiver. Next, a signal is sent from an oscillator connected to one side of the measuring device jack 8, and the other receiver receives the return signal from the subscriber circuit 2, thereby measuring the return loss.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明によれば、測定対象加入者回
路とリターンロス測定のための４線式トランク回路とを
接続して測定することにより、加入者回路を無駄に使用
することなく、かつ従来のようにロス補正の必要なく、
加入者回路のリターンロス測定を行なうことができる。As explained above, according to the present invention, by connecting the subscriber circuit to be measured and the 4-wire trunk circuit for return loss measurement for measurement, the subscriber circuit is not wasted and There is no need for loss compensation as in the past,
Return loss measurements of subscriber circuits can be made.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明の一実施例を示す構成図、第２図は従来
例を示す図である。 １・・・終端回路、２・・・測定対象加入者回路、３・
・・通話スイッチ、５・・・４線式トランク回路、６・
・・交換機制御回路、７・・・タイプライタ、８・・・
測定器用ジャック。FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is a diagram showing a conventional example. 1... Termination circuit, 2... Subscriber circuit to be measured, 3.
・・Call switch, 5・4-wire trunk circuit, 6・
...Exchange control circuit, 7...Typewriter, 8...
Measuring instrument jack.

Claims (1)

【特許請求の範囲】[Claims] 終端回路を有する測定加入者回路に通話スイッチを介し
て４線式トランク回路を接続し、このトランク回路に測
定器用ジャックを介して発振器及び受信器を接続し、前
記加入者回路のリターンロスを測定することを特徴とす
る加入者回路リターンロス測定方式。A 4-wire trunk circuit is connected to the measurement subscriber circuit having a termination circuit via a telephone switch, an oscillator and a receiver are connected to this trunk circuit via a measuring instrument jack, and the return loss of the subscriber circuit is measured. A subscriber circuit return loss measurement method characterized by:
JP15011489A 1989-06-12 1989-06-12 Subscriber circuit return loss measuring system Pending JPH0313154A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15011489A JPH0313154A (en) 1989-06-12 1989-06-12 Subscriber circuit return loss measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15011489A JPH0313154A (en) 1989-06-12 1989-06-12 Subscriber circuit return loss measuring system

Publications (1)

Publication Number Publication Date
JPH0313154A true JPH0313154A (en) 1991-01-22

Family

ID=15489795

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15011489A Pending JPH0313154A (en) 1989-06-12 1989-06-12 Subscriber circuit return loss measuring system

Country Status (1)

Country Link
JP (1) JPH0313154A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10335088B2 (en) 2015-03-23 2019-07-02 Samsung Electronics Co., Ltd. Apparatus and method for detecting biometric information

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10335088B2 (en) 2015-03-23 2019-07-02 Samsung Electronics Co., Ltd. Apparatus and method for detecting biometric information

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