JP2668688B2 - Terminal device of communication system - Google Patents

Terminal device of communication system

Info

Publication number
JP2668688B2
JP2668688B2 JP62303609A JP30360987A JP2668688B2 JP 2668688 B2 JP2668688 B2 JP 2668688B2 JP 62303609 A JP62303609 A JP 62303609A JP 30360987 A JP30360987 A JP 30360987A JP 2668688 B2 JP2668688 B2 JP 2668688B2
Authority
JP
Japan
Prior art keywords
supply
terminal
signal
blocking
current
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 - Lifetime
Application number
JP62303609A
Other languages
Japanese (ja)
Other versions
JPH01144847A (en
Inventor
好男 佐野
幹夫 中山
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.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62303609A priority Critical patent/JP2668688B2/en
Publication of JPH01144847A publication Critical patent/JPH01144847A/en
Application granted granted Critical
Publication of JP2668688B2 publication Critical patent/JP2668688B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Description

【発明の詳細な説明】 〔概要〕 通信システムの端末装置における特に端末側終端装置
において、商用電源を変換した直流電流のほか、交換機
からの直流電流によって動作が行われ、通常商用電源を
変換した直流を使用するが、商用電源の停電時に交換機
からの直流電流に切り換えられ動作電源とする構成にお
いて、商用電源を停電時を考慮して、不要な電力消費を
極力削減することを目的とし、接続線を介して互いに接
続される端末側終端装置と網終端装置とより構成され、
網終端装置からディジタル加入者線を介し交換機と接続
され、かつ端末側終端装置へは商用電源による直流電流
が、また商用電源の停電の際は交換機からの直流電流が
それぞれ網終端装置より送出される如き通信システムの
端末装置において、端末側終端装置には、通信手段、制
御手段を含む複数の機能手段の他、網終端装置から入力
される直流電流を機能手段に供給する直流供給手段と、
直流供給手段から機能手段への直流電流供給を阻止する
ための機能手段における供給阻止手段と、ディジタル加
入者線を介する着信を検出し、検出信号を発生する受信
検出手段と、端末側終端装置における使用者の発呼を検
出し、検出信号を発生する発信検出手段と、上記検出信
号の入力された際供給阻止信号を阻止解除信号に変換す
る制御信号発生手段とを備え、制御信号発生手段は受信
検出手段または発信検出手段からの検出信号の入力され
た際供給阻止信号を阻止解除信号に変換し直流供給手段
から機能手段への供給阻止手段による電流供給阻止を解
除するようにする。 〔産業上の利用分野〕 本発明は通信システムの端末装置における特に端末側
終端装置の構成に関し、供給電力の有効な消費を実現せ
んとするものである。 ディジタル統合通信網（所謂ISDN）に収容される端末
装置は端末側終端装置と網終端装置とから構成され、端
末側終端装置は網終端装置及びディジタル加入者線を介
し交換機と接続され、網終端装置は商用電源が給電中は
商用電源からの変換した直流電流を、商用電源が停電す
ると交換機からの直流電流を端末側終端装置の電流供給
手段に送り、端末側終端装置では電話機等の通信手段、
プロセッサ等の制御手段の如き機能手段に直流電流を供
給している。 そして端末側終端装置では機能手段として記憶装置、
キーボード、表示装置等も含まれているため、通常は商
用電源から変換された直流電流によって動作するが、商
用電源が停電した場合は交換機からディジタル加入者線
を介する直流電流により動作するため、端末側終端装置
では使用電力の削減特に無通信時における使用電力の節
減が必要となる。 〔従来の技術〕 第４図は本発明の対称となる通信システムを示す図で
あり、第５図は従来の端末装置における特に端末側終端
装置の一例を示す図である。 第５図において、端末側終端装置の一例として、電話
装置10が示される。 第４図において端末装置は端末側終端装置（TE）１と
網終端装置（NT）２とより構成され、端末側終端装置
（TE）１は同様に加入者の宅内に設置された網終端装置
（NT）２を介してディジタル加入者線３に接続され、さ
らに交換機４に接続されている。 電源として宅内側の商用電源５を使用の場合網終端装
置２は商用電源５から変換した直流電流を、受信回線６
及び送信回線７を経由して端末側終端装置１に供給する
が、商用電源５が停電すると、網終端装置２はディジタ
ル加入者線３を経由して交換機４から供給される直流電
流に切り換え、この直流電流を受信回線６及び送信回線
７を経由して端末側終端装置１に供給する。 なお交換機４からの直流電流を供給する場合には、端
末側終端装置１に許される消費電力は、商用電源供給時
の半分以下に制限される。 第５図において、電話装置10には、受信回線６から受
信変成器61を介しておくられてくる所定フレーム形式の
信号を受信するレシーバ101と、送信変成器71を介して
送信回線７に所定フレーム形式の信号を送信するドライ
バ102と、レシーバ101が受信するフレーム形式の信号を
音声信号及び制御信号に分解し、また電話装置10から送
出する音声信号及び制御信号を所定のフレーム形式に組
立てるインタフェース制御回路103とを備えている。ま
たインタフェース制御回路103から情報チャネル線104を
経由して伝達される音声信号を送受器106に伝達し、ま
た送受器106から伝達される音声信号を情報チャネル線1
04を経由してインタフェース制御回路103に伝達する通
話回線105と、インタフェース制御回路103との間で制御
線107を経由して各種制御信号を伝達するプロセッサ108
と、プロセッサ108が制御線107を経由してアクセスする
読出専用メモリ（ROM）109及び書込読出メモリ（RAM）1
10とのほか、さらに電話装置の使用者が通話先の電話番
号の選択等に使用するダイヤルボタン111と、使用者が
送受器106を上げ下ろしする際に開閉するフックスイッ
チ112とを具備している。 また直流供給手段113は、受信回線６及び送信回線７
を経由して網終端装置２から供給される例えば40ボルト
の直流電流を受電し、必要な直流電圧に変換し、給電線
114を経由してレシーバ101、ドライバ102、インタフェ
ース制御回路103、通話回路105及びプロセッサ108の如
き機能手段に直流電力を供給する。 〔発明が解決しようとする問題点〕 以上の説明から明らかな如く従来ある端末側終端装置
においては、商用電源５が通電中か停電中かに拘わら
ず、また端末側終端装置が通話中か否かに拘わらず常に
同一の直流電力を消費していた。 本発明は商用電源の停電の際交換機からの直流電流に
切り換え使用しなければならないことを考慮して、不要
な電力消費を極力削減することを目的とする。 〔問題点を解決するための手段〕 上記目的は本発明により、接続線を介して互いに接続
される端末側終端装置と網終端装置とより構成され、網
終端装置からディジタル加入者線を介し交換機と接続さ
れ、かつ端末側終端装置へは商用電源による直流電流
が、また商用電源の停電の際は交換機からの直流電流が
それぞれ網終端装置より送出される如き通信システムの
端末装置において、 端末側終端装置には、 通信手段、制御手段を含む複数の機能手段の他、 網終端装置から入力される直流電流を機能手段に供給
する直流供給手段と、 直流供給手段から機能手段への直流電流供給を阻止す
るための機能手段における供給阻止手段と、 ディジタル加入者線を介する着信を検出し、検出信号
を発生する受信検出手段と、 端末側終端装置における使用者の発呼を検出し、検出
信号を発生する発信検出手段と、 上記検出信号の入力された際供給阻止信号を阻止解除
信号に変換する制御信号発生手段とを備え、 制御信号発生手段は受信検出手段または発信検出手段
からの検出信号の入力された際供給阻止信号を阻止解除
信号に変換し直流供給手段から機能手段への供給阻止手
段による電流供給阻止を解除することを特徴とする通信
システムの端末装置によって達成される。 〔作用〕 本発明では端末側終端装置と網終端装置とからなる端
末装置での端末側終端装置は網終端装置及びディジタル
加入者線を介し交換機に接続される。 この場合交換機からの直流電流はディジタル加入者線
と網端末装置とを介し端末側終端装置の直流供給手段に
入力され、この直流供給手段からの電流は、端末側終端
装置内の通信手段、制御手段である通話回路、プロセッ
サの如き複数の機能手段にそれぞれ分岐して供給され
る。 しかし本発明では端末側終端装置における機能の拡大
に伴う機能手段の増加に対応して交換機からの直流電流
のほか、さらに網端末装置で商用電源を直流電流に変換
し、この電流も交換機からの直流電流と同様に端末側終
端装置の直流供給手段に入力するようにしている。 このため通常は商用電源から変換された直流電流を端
末側終端装置で使用し、商用電源の停電時に網終端装置
で交換機からの直流電流に切り換え使用する。 従って電流供給手段は商用電源から変換された直流電
流を、また商用電源の停電の際は交換機からの直流電流
を各機能手段に供給する。 そして本発明では、端末側終端装置における無通信状
態では受信検出手段及び発信検出手段に対してのみ電流
供給手段から対応する動作電圧を与え、通信手段、制御
手段等の機能手段に対しては制御信号発生手段からの供
給阻止信号によって電流供給を止め、受信検出或いは発
信検出の際に始めて制御信号発生手段で供給阻止信号が
阻止解除信号に変換され、必要な機能手段に対し電流供
給手段から電流を供給するので、無通信時における端末
側終端装置での電力節減効果は大である。 従って本発明では交換機からの直流電流と、商用電源
から変換された直流電流の両方に対する効率的な電力使
用が可能となる。 なお受信検出は動作電圧と受信信号との重畳電圧を基
準電圧と比較すればよいので受信検出手段は増幅器と比
較器との組合せの回路で構成され、また発信検出手段は
フックスイッチの如き発呼手段の動作による抵抗端の電
圧の変化を検出すればよいので、いづれも回路構成は簡
単であり、僅かの電流供給で済む。 またかかる両検出手段のいづれかの検出信号によって
供給阻止信号から阻止解除信号に変換されるのみである
ため制御信号発生手段も論理和ゲートのみで構成され
る。 さらに各機能手段に対する電流供給の制限のための供
給阻止手段は各機能手段に設けてある。 これによって制御信号発生手段から各機能手段に対す
る供給阻止信号及び阻止解除信号の送出のための供給制
御線は共通線でよく、各機能手段に対する供給制御線は
この共通の供給制御線からそれぞれ分岐されればよい。 またこのように各機能手段毎に供給阻止手段を配置す
ることによって各機能手段毎の配置変更も容易となる。 〔実施例〕 以下本発明の一実施例を図面により説明する。 第１図は本発明の一実施例による端末側終端装置を示
す図であり、第２図は第１図における受信検出手段とし
てのピークホールド回路の一例を示す図であり、第３図
は第２図のピークホールド回路における信号波形を例示
する図である。なお全図を通じて同一符号は同一対象物
を示す。また対象とする通信システムは第４図に示す通
りとする。 第１図において端末側終端装置として電話装置10が示
され、レシーバ101、ドライバ102、インタフェース制御
回路103、通話回路105は通信手段としての機能手段、プ
ロセッサ108、ROM109、RAM110等は制御手段としての機
能手段を示している。 また受信検出手段122として第２図の如きピークホー
ルド回路が使用され、発呼検出手段として、直流電圧12
4（例えば＋５ボルト）に接続されたフックスイッチ115
及び抵抗123が設けられている。 機能手段としてのレシーバ101、ドライバ102、インタ
フエース制御回路103、通話回路105、及びプロセッサ10
8に設けられる供給阻止手段121は制御信号発生手段から
の供給阻止信号によって制御され、直流供給手段113か
ら給電線114を経由して各機能手段に供給される直流電
力を阻止する。 受信検出手段122の入力端子1221は、受信変成器61の
二次捲線側に接続され、出力端子1231は制御信号発生手
段としての論理和ゲート125の一方の入力端子に接続さ
れる。また発信検出手段を構成するフックスイッチ115
と抵抗123における接続点は、制御信号発生手段として
の論理和ゲート125の他方の入力端子に接続される。 なおフックスイッチと抵抗123との接続点の直流電圧
をｅ′とする。 論理和ゲート125の出力端子は各機能手段に設けられ
ている供給阻止手段121に接続される。 第１図において、電話装置10が無通信の状態では、受
信回線６から電話装置10には第３図に示す如き受信信号
ａは到来しておらず、受信検出手段122の入力端子1221
には、受信変成器61の中性点に接続された直流電圧1220
（例えば＋2.5ボルト）のみが動作電圧として入力され
ている。 かかる状態では第２図における受信検出手段としての
ピークホールド回路では増幅器1222の反転入力端子
（−）および抵抗1223およびダイオード1224を介して増
幅器1222の出力端子に接続されたコンデンサ1225の端子
電圧ｃは、動作電圧としての直流＋2.5ボルトとなって
いる。 一方、電話装置10に着信があると、受信回線６から第
３図に示される如き受信信号ａが到着する。 受信信号ａは所定周期Ｔ（例えば250マイクロ秒）で
繰り返す正及び負の波高値V1を有するフレームパルスa1
及びa2を含むAMI形式の符号により構成される。 受信信号ａが到着すると、受信検出手段としてのピー
クホールド回路122の入力端子1221には動作電圧1220に
受信信号ａが重畳された入力信号ｂが入力される。 入力信号ｂは増幅器1222の非反転入力端子（＋）に入
力され、増幅された後出力端子から出力された抵抗1223
及びダイオード1224により整流されコンデンサ1225を充
電する。 その結果、コンデンサ1225及び抵抗1223により定まる
時定数を受信信号ａの周期Ｔより充分長く設定して置け
ば、コンデンサ1225の端子電圧ｃは入力信号ｂの尖頭電
圧を保持することとなる。 端子電圧ｃは比較器1227の反転入力端子（−）に入力
される。 一方比較器1227の非反転入力端子（＋）には直流電圧
1228、抵抗1229及び1230により、直流電圧1220に設定さ
れた基準電圧ｄが入力されている。 比較器1227は反転入力端子（−）に入力される端子電
圧ｃを非反転入力端子（＋）に入力される基準電圧ｄと
比較し、端子電圧ｃが基準電圧ｄを下回る場合、即ち受
信信号ａが到着しておらず、端子電圧ｃが直流＋2.5ボ
ルトに設定されている場合には、出力端子1231から出力
する電圧ｅを＋５ボルトに設定し、また端子電圧ｃが基
準電圧ｄを上回る場合、即ち受信信号ａが到着した場合
には、出力端子から出力する検出信号を地電位に設定す
る。 また電話装置10の使用者が送受器106を下ろしている
状態では、フックスイッチ115は復旧状態（第１図に示
される開放状態）に設定されているため、フックスイッ
チ115と抵抗123との接続点の直流電圧、即ち電圧ｅ′は
直流電圧124（＋５ボルト）に設定されているが、使用
者が発呼し、送受器106を上げると、フックスイッチ115
が動作状態（閉成状態）となり、電圧ｅ′は検出信号と
しての地電位に設定される。 受信検出手段としてのピークホールド回路122の出力
端子1231から出力される検出信号、並びに発信検出手段
としてのフックスイッチ115と抵抗123との接続点から出
力される検出信号（共に地電位）は、制御信号発生手段
としての論理和ゲート125に与えられ、論理和ゲートは
供給阻止信号としての＋5Vを阻止解除信号としての地電
位に変換し、これは供給制御線126を経由して各機能手
段に設けられた供給阻止手段121に伝達される。 各供給阻止手段121は供給制御線126を経由して伝達さ
れる電圧が供給阻止信号としての直流電圧124（＋５ボ
ルト）に設定されている状態では直流供給手段113から
給電線114を経由して供給される直流電力を遮断し、各
機能手段内部への給電を阻止するが、阻止解除信号とし
ての地電位に設定されいる状態では直流供給手段113か
ら給電線114を経由して供給される直流電力を各機能手
段内部に給電する。 以上の説明から明らかな如く本実施例によれば、電話
装置10が無通信状態では受信検出手段及び発信検出手段
に対応する動作電圧（受信検出手段には＋2.5V、発信検
出手段には＋5V）のみが与えられているため、各機能手
段は直流供給手段113から供給される直流電力を消費せ
ず、一方着呼が生起して受信信号ａが到着するとその検
出信号によって阻止解除信号としての地電位が発生し、
他方発呼が生起してフックスイッチ115が動作すると発
信検出手段の検出信号によって阻止解除信号としての地
電位が発生するため各機能手段は直流供給手段113から
供給される直流電力を消費することとなる。 なお、第２図はあく迄本発明の一実施例に過ぎず、例
えば受信信号ａ等は図示されるものに限定されることは
無く他に幾多の変形が考慮されるが、何れの場合にも本
発明の効果は変わらない。また電話装置10の機能手段は
図示されるものに限定されることは無く他に幾多の変形
が考慮されるが何れの場合にも本発明の効果は変わらな
い。更に端末側終端装置は図示される電話装置10に限定
されるものではない。 〔発明の効果〕 以上本発明によれば端末側終端装置が無通信状態にあ
る場合には、端末側終端装置を構成する各機能手段に対
する給電は供給阻止手段により停止されるため、交換機
から供給される直流電流に対しても、また商用電源から
変換される直流電流に対してもそれぞれ電力の供給が削
減され、特に商用電源が停電中の場合に有効となる。DETAILED DESCRIPTION OF THE INVENTION [Overview] In a terminal device of a communication system, particularly in a terminal-side terminal device, in addition to a DC current converted from a commercial power supply, an operation is performed by a DC current from an exchange, and a normal commercial power supply is converted. DC is used, but in the configuration where the DC power is switched to DC current from the exchange when the commercial power supply fails, the power supply is used as an operating power supply in order to reduce unnecessary power consumption as much as possible in consideration of the commercial power supply failure. The terminal-side terminating device and the network terminating device connected to each other via a wire,
The network termination unit is connected to the exchange via a digital subscriber line, and a DC current from the commercial power supply is sent to the terminal side termination device, and a DC current from the exchange is sent from the network termination device in the event of a commercial power failure. In a terminal device of such a communication system, the terminal-side terminal device includes a communication unit, a plurality of functional units including a control unit, a DC supply unit that supplies a DC current input from the network terminal unit to the functional unit,
A supply blocking means in the function means for blocking the supply of the DC current from the DC supply means to the function means, a reception detecting means for detecting an incoming call via the digital subscriber line and generating a detection signal; A transmission detecting means for detecting a call of the user and generating a detection signal, and a control signal generating means for converting a supply blocking signal into a blocking release signal when the detection signal is input, the control signal generating means comprising: When a detection signal is input from the reception detection means or the transmission detection means, the supply blocking signal is converted into a blocking release signal to release the current supply blocking by the supply blocking means from the DC supply means to the functional means. [Field of Industrial Application] The present invention relates to the configuration of a terminal-side terminating device in a terminal device of a communication system, and is intended to realize effective consumption of supplied power. A terminal device accommodated in a digital integrated communication network (so-called ISDN) is composed of a terminal terminating device and a network terminating device. The terminal terminating device is connected to an exchange via a network terminating device and a digital subscriber line. The equipment sends the DC current converted from the commercial power supply while the commercial power supply is supplying power, and sends the DC current from the exchange to the current supply means of the terminal side terminal equipment when the commercial power supply is cut off. ,
A direct current is supplied to functional means such as control means such as a processor. And in the terminal side terminating device, a storage device as a functional means,
Since it also includes a keyboard, display device, etc., it normally operates with DC current converted from commercial power, but when commercial power is interrupted, it operates with DC current from the exchange via the digital subscriber line, so terminals In the side terminating device, it is necessary to reduce the power consumption, especially at the time of no communication. [Prior Art] FIG. 4 is a diagram showing a symmetric communication system of the present invention, and FIG. 5 is a diagram showing an example of a conventional terminal device, particularly an example of a terminal-side terminal device. In FIG. 5, a telephone device 10 is shown as an example of the terminal-side terminal device. In FIG. 4, the terminal equipment comprises a terminal equipment (TE) 1 and a network equipment (NT) 2, and the terminal equipment (TE) 1 is also a network equipment installed in the subscriber's home. It is connected to the digital subscriber line 3 via the (NT) 2 and is further connected to the exchange 4. When the commercial power source 5 inside the house is used as the power source, the network terminating device 2 converts the DC current converted from the commercial power source 5 into the receiving line 6.
When the commercial power supply 5 fails, the network terminator 2 switches to a DC current supplied from the exchange 4 via the digital subscriber line 3, and This direct current is supplied to the terminal side terminal device 1 via the receiving line 6 and the transmitting line 7. When the direct current from the exchange 4 is supplied, the power consumption allowed for the terminal-side terminating device 1 is limited to half or less of that during commercial power supply. In FIG. 5, a telephone apparatus 10 includes a receiver 101 for receiving a signal of a predetermined frame format transmitted from a receiving line 6 via a receiving transformer 61 and a transmission line 7 via a transmitting transformer 71. A driver 102 for transmitting a frame signal and an interface for decomposing the frame signal received by the receiver 101 into a voice signal and a control signal, and assembling the voice signal and the control signal transmitted from the telephone device 10 into a predetermined frame format. And a control circuit 103. Further, the audio signal transmitted from the interface control circuit 103 via the information channel line 104 is transmitted to the handset 106, and the audio signal transmitted from the handset 106 is transmitted to the information channel line 1.
A communication line 105 transmitted to the interface control circuit 103 via 04, and a processor 108 transmitting various control signals between the interface control circuit 103 and a control line 107.
And a read only memory (ROM) 109 and a write / read memory (RAM) 1 accessed by the processor 108 via the control line 107.
In addition to 10, the telephone device further includes a dial button 111 used by a user of the telephone device to select a telephone number to be called, and a hook switch 112 that opens and closes when the user raises and lowers the handset 106. . Further, the DC supply means 113 includes a receiving line 6 and a transmitting line 7.
For example, it receives a DC current of 40 V supplied from the network terminating device 2 via the converter, converts it to a required DC voltage, and feeds it.
DC power is supplied to functional means such as the receiver 101, the driver 102, the interface control circuit 103, the communication circuit 105, and the processor 108 via 114. [Problems to be Solved by the Invention] As is apparent from the above description, in the conventional terminal-side terminal device, whether the commercial power supply 5 is energized or the power is stopped, and whether the terminal-side terminal device is in a call or not. Regardless, the same DC power was always consumed. SUMMARY OF THE INVENTION An object of the present invention is to reduce unnecessary power consumption as much as possible in consideration of the necessity of switching to and using a direct current from an exchange in the event of a commercial power failure. [Means for Solving the Problems] According to the present invention, the above object comprises a terminal-side terminal unit and a network terminal unit connected to each other via a connection line. The terminal equipment of a communication system in which a DC current from the commercial power supply is sent to the terminal equipment at the terminal side, and a DC current from the exchange is sent from the network equipment in the event of a commercial power failure, The terminating device includes a plurality of functional means including communication means and control means, a DC supply means for supplying a DC current input from the network terminating apparatus to the functional means, and a DC current supply from the DC supplying means to the functional means. Supply blocking means in the function means for blocking incoming calls, reception detecting means for detecting an incoming call via the digital subscriber line and generating a detection signal, and use in the terminal-side terminal device. Transmission detection means for detecting a call of a user and generating a detection signal; and control signal generation means for converting a supply blocking signal to a blocking release signal when the detection signal is input, the control signal generating means comprising: A communication characterized in that when a detection signal is input from the reception detection means or the transmission detection means, the supply blocking signal is converted into a blocking release signal and the current supply blocking by the supply blocking means from the DC supply means to the functional means is released. Achieved by the terminal equipment of the system. [Operation] In the present invention, the terminal equipment in the terminal equipment comprising the terminal equipment and the network equipment is connected to the exchange via the network equipment and the digital subscriber line. In this case, the DC current from the exchange is input to the DC supply means of the terminal terminating device via the digital subscriber line and the network terminal device. It is supplied by being branched to a plurality of functional means such as a communication circuit and a processor. However, in the present invention, in addition to the DC current from the exchange in response to the increase in the function means accompanying the expansion of the function in the terminal-side terminal device, the network terminal device further converts the commercial power into DC current, and this current is also transmitted from the exchange. Like the DC current, it is input to the DC supply means of the terminal-side terminating device. Therefore, normally, the DC current converted from the commercial power supply is used in the terminal-side terminating device, and is switched to the DC current from the exchange in the network terminating device when the commercial power supply fails. Therefore, the current supply means supplies the DC current converted from the commercial power supply and the DC current from the exchange to the functional means when the commercial power supply fails. According to the present invention, in a non-communication state in the terminal-side terminal device, a corresponding operating voltage is applied from the current supply unit only to the reception detection unit and the transmission detection unit, and the control unit controls the communication unit and the control unit. The current supply is stopped by the supply inhibition signal from the signal generation means, and the supply inhibition signal is converted into the inhibition release signal by the control signal generation means only at the time of reception detection or transmission detection. , The power saving effect at the terminal-side terminating device during non-communication is great. Therefore, the present invention enables efficient use of electric power for both the direct current from the exchange and the direct current converted from the commercial power supply. Since the reception detection may be performed by comparing the superimposed voltage of the operating voltage and the reception signal with the reference voltage, the reception detection means is composed of a combination circuit of an amplifier and a comparator, and the transmission detection means is a call switch such as a hook switch. Since it suffices to detect the change in the voltage at the resistance end due to the operation of the means, the circuit configuration is simple in each case and a small amount of current supply is sufficient. Further, since the supply blocking signal is only converted into the blocking release signal by either of the detection signals of both detecting means, the control signal generating means is also composed of only the OR gate. Furthermore, supply blocking means for limiting the current supply to each functional means is provided in each functional means. Accordingly, the supply control line for transmitting the supply inhibition signal and the inhibition release signal from the control signal generation means to each function means may be a common line, and the supply control line for each function means is branched from the common supply control line. Just do it. Further, by arranging the supply blocking means for each functional means in this way, it becomes easy to change the arrangement for each functional means. Embodiment An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a terminal terminating device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a peak hold circuit as reception detecting means in FIG. 1, and FIG. FIG. 3 is a diagram illustrating a signal waveform in the peak hold circuit of FIG. 2; The same reference numerals indicate the same objects throughout the drawings. The target communication system is as shown in FIG. In FIG. 1, a telephone device 10 is shown as a terminal-side terminal device, and a receiver 101, a driver 102, an interface control circuit 103, and a communication circuit 105 are function units as communication means, and a processor 108, a ROM 109, a RAM 110, and the like are control units. The functional means are shown. A peak hold circuit as shown in FIG. 2 is used as the reception detecting means 122, and the DC voltage 12 is used as the calling detecting means.
Hook switch 115 connected to 4 (eg +5 volts)
And a resistor 123 are provided. Receiver 101, driver 102, interface control circuit 103, communication circuit 105, and processor 10 as functional means
The supply blocking means 121 provided in 8 is controlled by a supply blocking signal from the control signal generating means, and blocks DC power supplied from the DC supply means 113 to each functional means via the power supply line 114. The input terminal 1221 of the reception detection means 122 is connected to the secondary winding side of the reception transformer 61, and the output terminal 1231 is connected to one input terminal of the OR gate 125 as a control signal generation means. Further, the hook switch 115 that constitutes the transmission detecting means.
The connection point of the resistor 123 and the resistor 123 is connected to the other input terminal of the OR gate 125 as the control signal generating means. Note that the DC voltage at the connection point between the hook switch and the resistor 123 is e '. The output terminal of the OR gate 125 is connected to the supply blocking means 121 provided in each functional means. In FIG. 1, when the telephone device 10 is in a non-communication state, the reception signal a as shown in FIG.
Includes a DC voltage 1220 connected to the neutral point of the receiving transformer 61.
(For example, +2.5 volts) is input as the operating voltage. In such a state, in the peak hold circuit as the reception detecting means in FIG. 2, the terminal voltage c of the capacitor 1225 connected to the inverting input terminal (−) of the amplifier 1222 and the output terminal of the amplifier 1222 via the resistor 1223 and the diode 1224 becomes The operating voltage is DC +2.5 volts. On the other hand, when an incoming call arrives at the telephone device 10, a reception signal a as shown in FIG. The received signal a has a frame pulse a 1 having positive and negative peak values V 1 which repeat at a predetermined period T (for example, 250 microseconds).
And a 2 including AMI code. When the reception signal a arrives, an input signal b obtained by superimposing the reception signal a on the operating voltage 1220 is input to the input terminal 1221 of the peak hold circuit 122 as the reception detection means. The input signal b is input to the non-inverting input terminal (+) of the amplifier 1222, and is amplified and then output from the output terminal to the resistor 1223.
And is rectified by the diode 1224 to charge the capacitor 1225. As a result, if the time constant determined by the capacitor 1225 and the resistor 1223 is set sufficiently longer than the period T of the received signal a, the terminal voltage c of the capacitor 1225 will hold the peak voltage of the input signal b. The terminal voltage c is input to the inverting input terminal (-) of the comparator 1227. On the other hand, the DC voltage is applied to the non-inverting input terminal (+) of the comparator 1227.
Reference voltage d set to DC voltage 1220 is input by 1228 and resistors 1229 and 1230. The comparator 1227 compares the terminal voltage c input to the inverting input terminal (-) with the reference voltage d input to the non-inverting input terminal (+), and when the terminal voltage c is lower than the reference voltage d, that is, the received signal a has not arrived and the terminal voltage c is set to DC +2.5 volts, the voltage e output from the output terminal 1231 is set to +5 volts, and the terminal voltage c is equal to the reference voltage d. When it exceeds, that is, when the reception signal a arrives, the detection signal output from the output terminal is set to the ground potential. When the user of the telephone device 10 has lowered the handset 106, the hook switch 115 is set to the recovery state (open state shown in FIG. 1), so that the connection between the hook switch 115 and the resistor 123 is established. The DC voltage at the point, that is, the voltage e 'is set to the DC voltage 124 (+5 volts), but when the user makes a call and raises the handset 106, the hook switch 115
Becomes an operating state (closed state), and the voltage e'is set to the ground potential as a detection signal. The detection signal output from the output terminal 1231 of the peak hold circuit 122 as the reception detection means and the detection signal (both ground potential) output from the connection point between the hook switch 115 and the resistor 123 as the transmission detection means are controlled. The signal is supplied to a logical OR gate 125 as a signal generating means, and the logical OR gate converts +5 V as a supply blocking signal to a ground potential as a blocking release signal, which is provided to each functional means via a supply control line 126. It is transmitted to the supply blocking means 121. When the voltage transmitted via the supply control line 126 is set to the DC voltage 124 (+5 volts) as the supply inhibition signal, each of the supply inhibition means 121 is supplied from the DC supply means 113 via the power supply line 114. The supplied DC power is cut off, and the power supply to the inside of each functional unit is blocked. However, when the ground potential is set as the blocking release signal, the DC power supplied from the DC supply unit 113 via the power supply line 114 is supplied. Electric power is supplied to the inside of each functional means. As is apparent from the above description, according to the present embodiment, when the telephone device 10 is in a non-communication state, the operating voltages corresponding to the reception detection means and the transmission detection means (+2.5 V for the reception detection means and +5 V for the transmission detection means) ), Each function means does not consume the DC power supplied from the DC supply means 113. On the other hand, when an incoming call occurs and the received signal a arrives, the detection signal serves as a blocking release signal. Earth potential is generated,
On the other hand, when a call originates and the hook switch 115 operates, a ground potential as a cancellation release signal is generated by the detection signal of the transmission detection means, so that each functional means consumes the DC power supplied from the DC supply means 113. Become. It is to be noted that FIG. 2 is merely an embodiment of the present invention and, for example, the received signal a and the like are not limited to those shown in the figure, and many other modifications may be considered. However, the effect of the present invention does not change. Further, the function means of the telephone device 10 is not limited to the illustrated one, and various other modifications are considered, but the effect of the present invention does not change in any case. Further, the terminal-side terminating device is not limited to the telephone device 10 shown. [Effects of the Invention] According to the present invention, when the terminal-side terminal device is in a non-communication state, the power supply to each of the functional units constituting the terminal-side terminal device is stopped by the supply blocking unit, and the power is supplied from the exchange. The supply of power is also reduced for the generated DC current and also for the DC current converted from the commercial power supply, which is particularly effective when the commercial power supply is stopped.

【図面の簡単な説明】 第１図は本発明の一実施例による端末側終端装置を示す
図、第２図は第１図における受信検出手段としてのピー
クホールド回路の一例を示す図、第３図は第２図のピー
クホールド回路における信号波形を例示する図、第４図
は本発明の対象となる通信システムの一例を示す図、第
５図は従来例としての端末側終端装置の一例を示す図で
ある。 図において、１は端末側終端装置（TE）、２は網終端装
置（NT）、３はディジタル加入者線、４は交換機、５は
商用電源、６は受信回線、７は送信回線、10は電話装
置、101はレシーバ、102はドライバ、103はインタフェ
ース制御回路、104は情報チャネル線、61は受信変成
器、71は送信変成器、105は通話回路、106は送受器、10
7は制御線、108はプロセッサ、109は読出専用メモリ（R
OM）、110は書込読出メモリ（RAM）、111はダイヤルボ
タン、112及び115はフックスイッチ、121は供給阻止手
段、122は受信検出手段、123,1223,1226,1229及び1230
は抵抗、124は直流電圧、125は制御信号発生手段として
の論理和ゲート、126は供給制御線、1220は直流電圧、1
221は入力端子、1222は増幅器、1224はダイオード、122
5はコンデンサ、1227は比較器、1231は出力端子を示
す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a terminal terminating device according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of a peak hold circuit as reception detecting means in FIG. FIG. 2 illustrates an example of a signal waveform in the peak hold circuit of FIG. 2, FIG. 4 illustrates an example of a communication system to which the present invention is applied, and FIG. 5 illustrates an example of a conventional terminal-side termination device. FIG. In the figure, 1 is a terminal equipment (TE), 2 is a network equipment (NT), 3 is a digital subscriber line, 4 is an exchange, 5 is a commercial power supply, 6 is a reception line, 7 is a transmission line, 10 is a transmission line. Telephone device, 101 is a receiver, 102 is a driver, 103 is an interface control circuit, 104 is an information channel line, 61 is a reception transformer, 71 is a transmission transformer, 105 is a communication circuit, 106 is a handset, 10
7 is a control line, 108 is a processor, 109 is a read-only memory (R
OM), 110 is a write / read memory (RAM), 111 is a dial button, 112 and 115 are hook switches, 121 is a supply blocking means, 122 is a reception detecting means, 123, 1223, 1226, 1229 and 1230.
Is a resistor, 124 is a DC voltage, 125 is an OR gate as control signal generating means, 126 is a supply control line, 1220 is a DC voltage, 1
221 is an input terminal, 1222 is an amplifier, 1224 is a diode, 122
5 is a capacitor, 1227 is a comparator, and 1231 is an output terminal.

Claims (1)

(57)【特許請求の範囲】 １．接続線を介して互いに接続される端末側終端装置と
網終端装置とより構成され、網終端装置からディジタル
加入者線を介し交換機と接続され、かつ端末側終端装置
へは商用電源による直流電流が、また商用電源の停電の
際は交換機からの直流電流がそれぞれ網終端装置より送
出される如き通信システムの端末装置において、 端末側終端装置には、 通信手段、制御手段を含む複数の機能手段の他、 網終端装置から入力される直流電流を機能手段に供給す
る直流供給手段と、 直流供給手段から機能手段への直流電流供給を阻止する
ための機能手段における供給阻止手段と、 ディジタル加入者線を介する着信を検出し、検出信号を
発生する受信検出手段と、 端末側終端装置における使用者の発呼を検出し、検出信
号を発生する発信検出手段と、 上記検出信号の入力された際供給阻止信号を阻止解除信
号に変換する制御信号発生手段とを備え、 制御信号発生手段は受信検出手段または発信検出手段か
らの検出信号の入力された際供給阻止信号を阻止解除信
号に変換し直流供給手段から機能手段への供給阻止手段
による電流供給阻止を解除することを特徴とする通信シ
ステムの端末装置(57) [Claims] It is composed of a terminal terminating device and a network terminating device that are connected to each other through a connection line. The network terminating device is connected to the exchange via a digital subscriber line. Also, in a terminal device of a communication system in which a direct current from an exchange is transmitted from a network terminating device in the event of a commercial power failure, the terminal terminating device includes a plurality of functional means including communication means and control means. A DC supply means for supplying a DC current input from the network terminating device to the function means; a supply blocking means in the function means for blocking DC current supply from the DC supply means to the function means; and a digital subscriber line. A reception detecting means for detecting an incoming call through, and a detection detecting means for generating a detection signal; and a transmission detecting means for detecting a user's call in the terminal-side terminating device and generating a detection signal, Control signal generating means for converting a supply blocking signal into a blocking release signal when the detection signal is input, wherein the control signal generating means is a supply blocking signal when a detection signal is input from the reception detecting means or the transmission detecting means. Is converted into a blocking release signal to cancel the blocking of current supply by the supply blocking means from the DC supply means to the functional means.
JP62303609A 1987-12-01 1987-12-01 Terminal device of communication system Expired - Lifetime JP2668688B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62303609A JP2668688B2 (en) 1987-12-01 1987-12-01 Terminal device of communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62303609A JP2668688B2 (en) 1987-12-01 1987-12-01 Terminal device of communication system

Publications (2)

Publication Number Publication Date
JPH01144847A JPH01144847A (en) 1989-06-07
JP2668688B2 true JP2668688B2 (en) 1997-10-27

Family

ID=17923053

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62303609A Expired - Lifetime JP2668688B2 (en) 1987-12-01 1987-12-01 Terminal device of communication system

Country Status (1)

Country Link
JP (1) JP2668688B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5381472A (en) * 1990-08-10 1995-01-10 Tamura Electric Works, Ltd. Power source control apparatus for telephone set
JP4654460B2 (en) * 2001-08-02 2011-03-23 パロマ工業株式会社 Household gas burning appliance

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5888959A (en) * 1981-11-20 1983-05-27 Nec Corp Power supply circuit of subscriber terminal
JPS6281869A (en) * 1985-10-04 1987-04-15 Nec Corp Power saving circuit for key telephone system

Also Published As

Publication number Publication date
JPH01144847A (en) 1989-06-07

Similar Documents

Publication Publication Date Title
EP0178993B1 (en) Front end circuit structure for a subscriber line circuit interface
GB2166624A (en) Remote control unit for automatic telephone answering device
EP0689330B1 (en) Telephone apparatus for caller ID information
US4485273A (en) Intercom adapter for telephones
EP0489215B1 (en) Coupling device to be connected to a DCE for the connection to a public switched telephone network having a local power supply circuit for allowing the use of the local telephone, DCE and workstation including the same
US4756021A (en) Telephone set
US4310728A (en) Ringing device for a private automatic branch exchange
JP2668688B2 (en) Terminal device of communication system
US5046089A (en) Subscriber line interface circuit with power-down mode
JPH09116674A (en) Communication connection device
CA1176771A (en) Arrangement for extending digital signaling to telephone subscribers' substations
US4602130A (en) Dual voltage source feed circuit configuration for a telephone line circuit
JP2847841B2 (en) Polarity inversion circuit
USRE35582E (en) Subscriber line interface circuit with power-down mode
JP3048368B2 (en) Power supply circuit for terminal equipment
JP3018365B2 (en) Power supply for telephone line
JPH11234420A (en) Terminal network controller
JPH05191928A (en) Power source circuit
JPS61245752A (en) Telephone line holding system
JP3313173B2 (en) Communication terminal device with line switching function and line switching method
JPH039675B2 (en)
KR19980073728A (en) Exchange system with line break check
JPS60212059A (en) Power feeding control system for multi-function telephone set
JPS6028364A (en) Automatic loss switching system
JPS6236424B2 (en)