JPH03192858A - Digital transmitter - Google Patents
Digital transmitterInfo
- Publication number
- JPH03192858A JPH03192858A JP1334373A JP33437389A JPH03192858A JP H03192858 A JPH03192858 A JP H03192858A JP 1334373 A JP1334373 A JP 1334373A JP 33437389 A JP33437389 A JP 33437389A JP H03192858 A JPH03192858 A JP H03192858A
- Authority
- JP
- Japan
- Prior art keywords
- circuit section
- loopback
- circuit
- feeding
- communication 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.)
- Pending
Links
- 238000004891 communication Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 7
- 230000008054 signal transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 1
Landscapes
- Maintenance And Management Of Digital Transmission (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はディジタル伝送装置に関し、特に局側通信回線
と端末装置との間のディジタル信号伝送を行い、かつ、
局より定電流給電を受けて端末装置に対して給電を行な
っているディジタル伝送装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a digital transmission device, and in particular, to a digital transmission device for transmitting digital signals between an office side communication line and a terminal device, and
The present invention relates to a digital transmission device that receives constant current power from a station and supplies power to a terminal device.
従来、この種のディジタル伝送装置は、第２図のブロッ
ク図に示すように、局から給電を受けた電源をＤＣ−Ｄ
Ｃ変換回路部９で電圧変換して、局側との信号授受を行
う受信および送信回路部３．４と、端末装置との信号授
受を行う送信および受信回路部６，７と、局側通信回線
用ディジタル信号と端末装置用ディジタル信号との相互
変換処理を行う信号処理回路部５とに直接ＤＣ電圧を供
給している。また、試験時だけしか使用しない折り返し
回路部８を有するが、この回路への給電をオン、オフす
るスイッチ回路を有していないために、常時折り返し回
路部８に給電が行なわれていた。なお、折り返し試験時
には端末側へ信号を送出しない様にしているために、送
信パルスを出すための電力が使用されていないので、通
常通信中よりも低消費電力となる。Conventionally, this type of digital transmission equipment receives power from a station using a DC-D converter, as shown in the block diagram of Figure 2.
A receiving and transmitting circuit section 3.4 converts the voltage in the C conversion circuit section 9 and exchanges signals with the station side, a transmitting and receiving circuit section 6 and 7 that exchanges signals with the terminal device, and a station side communication circuit. A DC voltage is directly supplied to a signal processing circuit section 5 that performs mutual conversion processing between a digital signal for a line and a digital signal for a terminal device. Further, although it has a foldback circuit section 8 that is used only during testing, it does not have a switch circuit to turn on and off power supply to this circuit, so power is always supplied to the loopback circuit section 8. Note that during the loopback test, no signals are sent to the terminal side, so no power is used to generate transmission pulses, so power consumption is lower than during normal communication.
上述した従来のディジタル伝送装置は、折り返し試験時
にしか使用しない折り返し回路部に、常時給電が行なわ
れているため、通常通信中にも電力を消費してしまい、
ディジタル伝送装置の消費電力が大きくなってしまうと
いう欠点がある。In the conventional digital transmission equipment described above, power is constantly supplied to the loopback circuit section, which is only used during loopback tests, so power is consumed even during normal communication.
A drawback is that the power consumption of the digital transmission device increases.
本発明のディジタル伝送装置は、局側のディジタル通信
回線への接続端子を介して遠方給電を受け２つの電源を
出力するＤＣ−ＤＣ変換回路部と、前記ＤＣ−ＤＣ変換
回路部の第１の出力から電源を受けて動作する前記ディ
ジタル通信回線に対する信号の送受信を行う送信回路部
・受信回路部ならびに端末装置に対する信号の送受信を
行う送信回路部・受信回路部ならびに前記ディジタル通
信回線と前記端末装置との間の入出力信号の処理をする
信号処理回路部ならびに前記端末装置への送信信号を前
記ディジタル通信回線側へ折りがえす折り返し回路部を
有し、前記ＤＣ−ＤＣ変換回路部の第２の出力から端末
装置に対して給電を行なっているディジタル伝送装置に
おいて、前記ＤＣ−ＤＣ変換回路部の第１の出力から前
記折り返し回路部への給電路に挿入され、前記信号処理
回路部からの折り返し制御信号により前記給電路をオン
オフするスイッチ回路を有することを特徴とする。The digital transmission device of the present invention includes a DC-DC conversion circuit unit that receives remote power supply via a connection terminal to a digital communication line on the station side and outputs two power sources, and a first DC-DC conversion circuit unit of the DC-DC conversion circuit unit A transmitting circuit section and a receiving circuit section that transmit and receive signals to and from the digital communication line that operates by receiving power from an output, a transmitting circuit section and a receiving circuit section that transmit and receive signals to and from a terminal device, and the digital communication line and the terminal device. and a signal processing circuit unit that processes input/output signals between In a digital transmission device that supplies power to a terminal device from the output of the DC-DC conversion circuit, the signal is inserted into a power supply path from the first output of the DC-DC conversion circuit to the folding circuit, and the output from the signal processing circuit is The present invention is characterized in that it includes a switch circuit that turns on and off the power supply path using a return control signal.
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.
第１図は本発明の一実施例のブロック図である。第１図
の実施例は折り返し回路部８の電源用のスイッチ回路１
を追加しているほかは第２図の従来例と同一である。こ
の実施例は、局側のディジタル通信回線へ接続端子２０
．２１を介して遠方給電を受け２個の電源を出力するＤ
Ｃ−ＤＣ変換回路部９と、ＤＣ−ＤＣ変換回路部９の第
１の出力３０から電源を受けて動作し、局側のディジタ
ル通信回線に対する信号の送受信を行う局側送信回路部
４および局側受信回路部３と、端末装置に対する信号の
送受信を行う端末送信回路部６および端末側受信回路部
７と、送受信回路部３゜４．６．７に対する入出力信号
の処理をする信号処理回路部５と、端末装置への送信信
号をディジタル通信回線側へ折り返す折り返し回路部８
を具備している。また、ＤＣ−ＤＣ変換回路部９の第２
の出力３１．３２から端末装置に対して給電を行なって
いる。スイッチ回路１はＤＣ−ＤＣ変換回路部９の第１
の出力３０から折り返し回路部８への給電路に挿入され
、信号処理部５からの折り返し制御信号出力３３により
給電路をオン、オフしている。このスイッチ回路１は折
り返し制御回路８への給電を、折り返し試験時にのみオ
ンとするようにしており、通常通信中にはオフとして給
電しない様にしている。FIG. 1 is a block diagram of one embodiment of the present invention. The embodiment shown in FIG.
This is the same as the conventional example shown in FIG. 2 except that . In this embodiment, a connection terminal 20 is connected to the digital communication line on the station side.
．． D that receives remote power supply via 21 and outputs two power supplies.
The station-side transmitting circuit unit 4 and the station side transmitter circuit unit 4 operate by receiving power from the first output 30 of the C-DC conversion circuit unit 9 and the DC-DC conversion circuit unit 9, and transmit and receive signals to and from the digital communication line at the station side. side receiving circuit section 3, a terminal transmitting circuit section 6 that transmits and receives signals to and from the terminal device, a terminal side receiving circuit section 7, and a signal processing circuit that processes input and output signals to and from the transmitting and receiving circuit section 3゜4.6.7. section 5, and a loopback circuit section 8 that loops back the transmission signal to the terminal device to the digital communication line side.
Equipped with: In addition, the second
Power is supplied to the terminal device from the outputs 31 and 32 of the terminal device. The switch circuit 1 is the first switch circuit of the DC-DC conversion circuit section 9.
It is inserted into the power supply path from the output 30 of the signal processing section 5 to the folding circuit unit 8, and the power supply line is turned on and off by the folding control signal output 33 from the signal processing unit 5. This switch circuit 1 turns on the power supply to the return control circuit 8 only during the return test, and turns it off during normal communication so that no power is supplied.
以上説明したように本発明は、折り返し回路８への給電
を折り返し試験時にのみ行い、通常通信中には給電しな
いようにするスイッチ回路を追加しているので、通常通
信中には、折り返し回路で電力を消費しないために低消
費電力化を計ることができる効果がある。As explained above, the present invention adds a switch circuit that supplies power to the loopback circuit 8 only during the loopback test and does not supply power during normal communication. This has the effect of reducing power consumption since no power is consumed.
第１図は本発明の一実施例のブロック図、第２図は従来
のディジタル伝送装置のブロック図である。
１・・・スイッチ回路、２・・・ハイブリッドトランス
、３・・・局側受信回路部、４・・・局側送信回路部、
５・・・信号処理回路部、６・・・端末側送信回路部、
７・・・端末側受信回路部、８・・・折り返し回路部、
９・・・ＤＣ
ンス、
ンサ。
ＤＣ変換回路部、
０・・・ドライバ用トラ
ト・・レシーバ用トランス、
２・・・コンデFIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional digital transmission device. DESCRIPTION OF SYMBOLS 1... Switch circuit, 2... Hybrid transformer, 3... Office side receiving circuit section, 4... Office side transmitting circuit section,
5... Signal processing circuit section, 6... Terminal side transmission circuit section,
7...Terminal side receiving circuit section, 8...Returning circuit section,
9...DC ns, ns. DC conversion circuit section, 0...Transformer for driver...transformer for receiver, 2...conde
Claims (1)
電を受け２つの電源を出力するＤＣ−ＤＣ変換回路部と
、前記ＤＣ−ＤＣ変換回路部の第１の出力から電源を受
けて動作する前記ディジタル通信回線に対する信号の送
受信を行う送信回路部・受信回路部ならびに端末装置に
対する信号の送受信を行う送信回路部・受信回路部なら
びに前記ディジタル通信回線と前記端末装置との間の入
出力信号の処理をする信号処理回路部ならびに前記端末
装置への送信信号を前記ディジタル通信回線側へ折りか
えす折り返し回路部を有し、前記ＤＣ−ＤＣ変換回路部
の第２の出力から前記端末装置に対して給電を行なって
いるディジタル伝送装置において、 前記ＤＣ−ＤＣ変換回路部の第１の出力から前記折り返
し回路部への給電路に挿入され、前記信号処理回路部か
らの折り返し制御信号により前記給電路をオンオフする
スイッチ回路を有することを特徴とするディジタル伝送
装置。[Scope of Claims] A DC-DC conversion circuit unit that receives remote power supply via a connection terminal to a digital communication line on the station side and outputs two power supplies, and a first output of the DC-DC conversion circuit unit. A transmitting circuit section and a receiving circuit section that transmit and receive signals to and from the digital communication line that operates in response to a power supply, a transmitting circuit section and a receiving circuit section that transmit and receive signals to and from the terminal device, and a connection between the digital communication line and the terminal device. a signal processing circuit unit that processes input/output signals between the two terminals, and a loopback circuit unit that loops back signals sent to the terminal device to the digital communication line side; In a digital transmission device that supplies power to the terminal device, the digital transmission device is inserted into a power supply path from the first output of the DC-DC conversion circuit section to the loopback circuit section, and is configured to perform loopback control from the signal processing circuit section. A digital transmission device characterized by comprising a switch circuit that turns on and off the power supply path based on a signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1334373A JPH03192858A (en) | 1989-12-21 | 1989-12-21 | Digital transmitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1334373A JPH03192858A (en) | 1989-12-21 | 1989-12-21 | Digital transmitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03192858A true JPH03192858A (en) | 1991-08-22 |
Family
ID=18276643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1334373A Pending JPH03192858A (en) | 1989-12-21 | 1989-12-21 | Digital transmitter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03192858A (en) |
-
1989
- 1989-12-21 JP JP1334373A patent/JPH03192858A/en active Pending
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