JP4362413B2

JP4362413B2 - IP phone power supply system conversion adapter and IP phone

Info

Publication number: JP4362413B2
Application number: JP2004138003A
Authority: JP
Inventors: 篤藤井
Original assignee: NEC Engineering Ltd
Current assignee: NEC Engineering Ltd
Priority date: 2004-05-07
Filing date: 2004-05-07
Publication date: 2009-11-11
Anticipated expiration: 2024-05-07
Also published as: JP2005323017A

Description

本発明は、ＩＰ電話機給電方式変換アダプタ及びＩＰ電話機に関し、特に、ＬＡＮ（Local Area Network）に接続される給電ハブからＩＰ電話機へ電源を供給するために用いられるアダプタ及び該アダプタを備えたＩＰ電話機に関する。 The present invention relates to an IP telephone power supply type conversion adapter and an IP telephone, and in particular, an adapter used to supply power to an IP telephone from a power supply hub connected to a LAN (Local Area Network), and an IP telephone including the adapter. About.

ＩＥＥＥ８０２．３等のＬＡＮ環境に電話機を接続するＩＰ電話機ネットワークにおいて、給電方式の異なる複数のハブに対応するための電話機用電源回路として、特許文献１には、図３及び図４に示す回路が開示されている。 Patent Document 1 discloses a circuit shown in FIG. 3 and FIG. 4 as a power supply circuit for a telephone to cope with a plurality of hubs having different power feeding methods in an IP telephone network in which the telephone is connected to a LAN environment such as IEEE 802.3. It is disclosed.

図３は、上記電源回路を備えたＩＰ電話機３６であって、ネットワーク３８に直接接続されるＲＪ４５コネクタ３２と、ネットワーク３８からのデジタル信号と直流電流とを分離する分離器３３と、ネットワーク３８の物理層を終端する伝送回路３４と、ＩＰ電話機３６の制御を司るＣＰＵ３５と、オーディオ回路、マイク、スピーカ、ダイヤルボタン、フックスイッチ等からなる電話機回路３７と、電源回路３１とで構成される。 FIG. 3 shows an IP telephone set 36 having the above power supply circuit, in which an RJ45 connector 32 directly connected to the network 38, a separator 33 for separating a digital signal and a direct current from the network 38, and a network 38 A transmission circuit 34 that terminates the physical layer, a CPU 35 that controls the IP telephone 36, a telephone circuit 37 that includes an audio circuit, a microphone, a speaker, a dial button, a hook switch, and the like, and a power supply circuit 31.

電源回路３１は、図４に示すように、入力電流を制限する制限抵抗４１と、その制限電流を解除するトランジスタ４２と、ＤＣ／ＤＣコンバータ４４の入力リップル除去用の入力容量４３と、その出力を遅延させる遅延回路４５を含むＤＣ／ＤＣコンバータ４４と、入力電圧を検出し、一定時間ＤＣ／ＤＣコンバータ４４の出力を停止させる入力電圧検出回路４６と、出力電圧を検出した後に一定時間遅延し、トランジスタ４９をオンさせる遅延回路４７と、ベース電流制限抵抗４８及びトランジスタ４２をオンさせるためのトランジスタ４９とで構成される。 As shown in FIG. 4, the power supply circuit 31 includes a limiting resistor 41 that limits the input current, a transistor 42 that releases the limiting current, an input capacitor 43 for removing the input ripple of the DC / DC converter 44, and its output. A DC / DC converter 44 including a delay circuit 45 that delays the input voltage, an input voltage detection circuit 46 that detects the input voltage and stops the output of the DC / DC converter 44 for a certain period of time, and a delay for a certain period of time after the output voltage is detected. , A delay circuit 47 for turning on the transistor 49, a base current limiting resistor 48, and a transistor 49 for turning on the transistor 42.

特開２００２−２５２７３１号公報JP 2002-252731 A

しかし、上記特許文献１に記載のようなＩＥＥＥ８０２．３ａｆ制定以前の方式Ａにのみ対応したＩＰ電話機は、ＩＥＥＥ８０２．３ａｆ方式の給電ハブに接続しても給電を受けることができず、ＡＣアダプタ等の電源を接続する必要があり、コンセントの使用数が増加するとともに、配線が複雑化するという問題があった。尚、「方式Ａ」とは、ＬＡＮに接続されたＩＰ電話機に対し、給電を開始する以前に認証用信号を送信データ線から受信データ線に対して送出し、受信した認証信号で特定のインピーダンスを検出することにより給電を開始し、給電電流が特定のピーク値を超えない限り給電を継続する給電方式をいう。 However, an IP telephone that supports only the method A prior to IEEE 802.3af establishment as described in Patent Document 1 cannot receive power even when connected to a power supply hub of the IEEE 802.3af method, such as an AC adapter. There is a problem that the number of outlets used increases and the wiring becomes complicated. Note that “method A” means that an authentication signal is sent from a transmission data line to a reception data line before starting to supply power to an IP telephone connected to a LAN. This is a power feeding method in which power feeding is started by detecting, and power feeding is continued unless the power feeding current exceeds a specific peak value.

また、ＩＥＥＥ８０２．３ａｆ方式にのみ対応したＩＰ電話機についても、方式Ａの給電ハブに接続しても給電を受けることができず、ＡＣアダプタ等の電源を接続する必要があり、上記と同様の問題があった。 Also, IP telephones that support only the IEEE 802.3af system cannot receive power even when connected to a power supply hub of system A, and need to be connected to a power source such as an AC adapter. was there.

そこで、本発明は、上記従来の技術における問題点に鑑みてなされたものであって、方式Ａにのみ対応したＩＰ電話機に対してＩＥＥＥ８０２．３ａｆ方式の給電ハブからの給電を可能にするとともに、ＩＥＥＥ８０２．３ａｆ方式にのみ対応したＩＰ電話機に対しても方式Ａの給電ハブから給電すること等が可能なＩＰ電話機給電方式変換アダプタ及びＩＰ電話機を提供することを目的とする。 Therefore, the present invention has been made in view of the problems in the above-described conventional technology, and enables power supply from an IEEE 802.3af system power supply hub to an IP telephone that supports only system A, It is an object of the present invention to provide an IP telephone power supply system conversion adapter and an IP telephone that can supply power from a power supply hub of system A even to an IP telephone that supports only the IEEE 802.3af system.

上記目的を達成するため、本発明は、ＬＡＮに接続されたＩＰ電話機と、該ＩＰ電話機に給電を開始する前に認証用信号を送信データ線から受信データ線に対して送出し、受信した認証信号で特定のインピーダンスを検出することにより給電を開始し、給電電流が特定のピーク値を超えない限り給電を継続する給電ハブとの間に接続可能なＩＰ電話機給電方式変換アダプタであって、前記認証用のインピーダンス素子と、前記認証の終了後に、データ送受信線を前記インピーダンス素子から切り離し、該データ送受信線に前記給電ハブから直流電力が重畳されるように回路を切り替え、前記ＩＰ電話機への給電を可能とする回路切替手段とを備えることを特徴とする。 In order to achieve the above object, the present invention provides an IP telephone connected to a LAN, and an authentication signal sent from the transmission data line to the reception data line before starting to supply power to the IP telephone. An IP telephone feeding method conversion adapter that can be connected to a feeding hub that starts feeding by detecting a specific impedance in a signal and continues feeding unless the feeding current exceeds a specified peak value, An impedance element for authentication and a data transmission / reception line are disconnected from the impedance element after the authentication is completed, a circuit is switched so that DC power is superimposed on the data transmission / reception line from the power supply hub, and power is supplied to the IP telephone. And a circuit switching means that makes it possible.

そして、本発明によれば、認証用のインピーダンス素子を用いて認証を行った後、回路切替手段によって、データ送受信線を前記インピーダンス素子から切り離し、該データ送受信線に給電ハブから直流電力が重畳されるように回路を切り替えてＩＰ電話機への給電を可能とするため、例えば、方式Ａに対応した給電ハブからＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機への給電が可能となり、ＩＥＥＥ８０２．３ａｆ方式にのみ対応したＩＰ電話機であっても給電を受けることができ、ＡＣアダプタ等の電源が不要となり、コンセントの使用数を削減することができ、配線を簡易化することができる。 According to the present invention, after authentication is performed using the impedance element for authentication, the data transmission / reception line is disconnected from the impedance element by the circuit switching unit, and DC power is superimposed on the data transmission / reception line from the feeding hub. In order to supply power to the IP telephone by switching the circuit so that, for example, power can be supplied from the power supply hub corresponding to the system A to the IP telephone of the IEEE 802.3af system, and only the IEEE 802.3af system is supported. Even an IP telephone can receive power, no power source such as an AC adapter is required, the number of outlets used can be reduced, and wiring can be simplified.

前記ＩＰ電話機給電方式変換アダプタにおいて、前記データ送受信線に直流電力が重畳されるように回路を切り替えた際に、該回路を流れる最大電流を制限するための定電流回路を備えるように構成することができる。 The IP telephone feeding system conversion adapter is configured to include a constant current circuit for limiting a maximum current flowing through the circuit when the circuit is switched so that DC power is superimposed on the data transmission / reception line. Can do.

また、本発明は、ＬＡＮに接続されたＩＰ電話機と、該ＩＰ電話機に給電を開始する前に特定の電圧以下の認証用電流を送信データ線から受信データ線に対して送出し、受信した認証電流で給電を開始する給電ハブとの間に接続可能なＩＰ電話機給電方式変換アダプタであって、前記認証用の電流値が特定の値以下の場合には、内部のスイッチ手段をオフすることにより特定の抵抗で終端する認証用回路を備え、前記認証の終了後に、データ送受信線に前記給電ハブから直流電力が重畳された際に、前記内部のスイッチ手段をオンすることにより、前記ＩＰ電話機への給電を可能とすることを特徴とする。 The present invention also provides an IP telephone connected to the LAN and an authentication current that is sent from the transmission data line to the reception data line by sending an authentication current equal to or lower than a specific voltage before starting to supply power to the IP telephone. An IP telephone power supply system conversion adapter that can be connected to a power supply hub that starts power supply with current, and when the current value for authentication is less than a specific value, the internal switch means is turned off. An authentication circuit that terminates at a specific resistance, and when the DC power is superimposed from the power supply hub on the data transmission / reception line after the authentication is completed, by turning on the internal switch means to the IP telephone It is possible to supply power.

そして、本発明によれば、認証用回路によって、認証の終了後に、データ送受信線に給電ハブから直流電力が重畳された際に、内部のスイッチ手段をオンすることによってＩＰ電話機への給電を可能とするため、例えば、ＩＥＥＥ８０２．３ａｆ方式の給電ハブから方式Ａにのみ対応したＩＰ電話機であっても給電を受けることができ、ＡＣアダプタ等の電源が不要となり、コンセントの使用数を削減することができ、配線を簡易化することができる。 According to the present invention, the authentication circuit can supply power to the IP telephone by turning on the internal switch means when DC power is superimposed on the data transmission / reception line from the power supply hub after the authentication is completed. Therefore, for example, even an IP telephone that supports only the system A from the power supply hub of the IEEE 802.3af system can receive power, no power source such as an AC adapter is required, and the number of outlets used can be reduced. And wiring can be simplified.

さらに、本発明は、ＬＡＮに接続されたＩＰ電話機と、該ＩＰ電話機に給電を開始する前に認証用信号を送信データ線から受信データ線に対して送出し、受信した認証信号で特定のインピーダンスを検出することにより給電を開始し、給電電流が特定のピーク値を超えない限り給電を継続する第１の給電ハブに接続可能であるとともに、ＬＡＮに接続されたＩＰ電話機と、該ＩＰ電話機に給電を開始する前に特定の電圧以下の認証用電流を送信データ線から受信データ線に対して送出し、受信した認証電流で給電を開始する第２の給電ハブに接続可能なＩＰ電話機給電方式変換アダプタであって、前記第１の給電ハブとの認証用のインピーダンス素子と、前記第１の給電ハブとの認証の終了後に、データ送受信線を前記インピーダンス素子から切り離し、該データ送受信線に前記第１の給電ハブから直流電力が重畳されるように回路を切り替え、前記ＩＰ電話機への給電を可能とする回路切替手段とを備えるとともに、前記第２の給電ハブとの認証用の電流値が特定の値以下の場合には、内部のスイッチ手段をオフすることにより特定の抵抗で終端する認証用回路を備え、前記第２の給電ハブとの認証の終了後に、データ送受信線に前記第２の給電ハブから直流電力が重畳された際に、前記内部のスイッチ手段をオンすることにより、前記ＩＰ電話機への給電を可能とすることを特徴とする。 Furthermore, the present invention provides an IP telephone connected to the LAN, and an authentication signal is transmitted from the transmission data line to the reception data line before starting to supply power to the IP telephone. Can be connected to the first power supply hub that continues to supply power as long as the power supply current does not exceed a specific peak value, and the IP telephone connected to the LAN and the IP telephone An IP telephone power supply system that transmits an authentication current of a specific voltage or less from a transmission data line to a reception data line before starting power supply and can be connected to a second power supply hub that starts power supply with the received authentication current A conversion adapter comprising: an impedance element for authentication with the first power supply hub; and a data transmission / reception line connected to the impedance element after the authentication with the first power supply hub is completed. And a circuit switching means for switching the circuit so that DC power is superimposed on the data transmission / reception line from the first power supply hub and enabling power supply to the IP telephone, and the second power supply hub. When the current value for authentication is equal to or less than a specific value, an authentication circuit that terminates with a specific resistance by turning off the internal switch means is provided, and after the authentication with the second power supply hub is completed When the DC power is superposed on the data transmission / reception line from the second power supply hub, power is supplied to the IP telephone by turning on the internal switch means.

そして、本発明にかかるＩＰ電話機給電方式変換アダプタによれば、例えば、方式Ａにのみ対応したＩＰ電話機またはＩＥＥＥ８０２．３ａｆ方式にのみ対応したＩＰ電話機のいずれであっても給電ハブからの給電が可能となる。 According to the IP telephone power supply system conversion adapter according to the present invention, for example, power can be supplied from the power supply hub for either an IP telephone that supports only the system A or an IP telephone that supports only the IEEE 802.3af system. It becomes.

また、本発明は、給電を開始する前に認証用信号を送信データ線から受信データ線に対して送出し、受信した認証信号で特定のインピーダンスを検出することにより給電を開始し、給電電流が特定のピーク値を超えない限り給電を継続する給電ハブとＬＡＮを介して接続可能なＩＰ電話機であって、前記認証用のインピーダンス素子と、前記認証の終了後に、データ送受信線を前記インピーダンス素子から切り離し、該データ送受信線に前記給電ハブから直流電力が重畳されるように回路を切り替え、該ＩＰ電話機への給電を可能とする回路切替手段とを備えることを特徴とする。 In addition, the present invention sends an authentication signal from the transmission data line to the reception data line before starting the power supply, starts the power supply by detecting a specific impedance with the received authentication signal, and the power supply current is An IP telephone that can be connected via a LAN to a power supply hub that continues to supply power as long as a specific peak value is not exceeded, and after the authentication is completed, a data transmission / reception line is connected from the impedance element And a circuit switching means for switching the circuit so that DC power is superposed on the data transmission / reception line from the power supply hub and enabling power supply to the IP telephone.

そして、本発明によれば、認証用のインピーダンス素子を用いて認証を行った後、回路切替手段によって、データ送受信線を前記インピーダンス素子から切り離し、該データ送受信線に給電ハブから直流電力が重畳されるように回路を切り替えてＩＰ電話機への給電を可能とするため、例えば、方式Ａに対応した給電ハブからＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機への給電が可能となり、ＩＥＥＥ８０２．３ａｆ方式にのみ対応したＩＰ電話機であっても給電を受けることが可能となる。 According to the present invention, after authentication is performed using the impedance element for authentication, the data transmission / reception line is disconnected from the impedance element by the circuit switching unit, and DC power is superimposed on the data transmission / reception line from the feeding hub. In order to supply power to the IP telephone by switching the circuit so that, for example, it is possible to supply power from the power supply hub corresponding to the system A to the IP telephone of the IEEE802.3af system, and only the IEEE802.3af system is supported. Even an IP telephone can receive power.

前記ＩＰ電話機において、前記データ送受信線に直流電力が重畳されるように回路を切り替えた際に、該回路を流れる最大電流を制限するための定電流回路を備えるように構成することができる。 The IP telephone can be configured to include a constant current circuit for limiting a maximum current flowing through the circuit when the circuit is switched so that DC power is superimposed on the data transmission / reception line.

さらに、本発明は、給電を開始する前に特定の電圧以下の認証用電流を送信データ線から受信データ線に対して送出し、受信した認証電流で給電を開始する給電ハブとＬＡＮを介して接続可能なＩＰ電話機であって、前記認証用の電流値が特定の値以下の場合には、内部のスイッチ手段をオフすることにより特定の抵抗で終端する認証用回路を備え、前記認証の終了後に、データ送受信線に前記給電ハブから直流電力が重畳された際に、前記内部のスイッチ手段をオンすることにより、該ＩＰ電話機への給電を可能とすることを特徴とする。 Further, according to the present invention, an authentication current having a specific voltage or less is transmitted from the transmission data line to the reception data line before starting the power supply, and the power supply hub starts the power supply with the received authentication current and the LAN. A connectable IP telephone, comprising: an authentication circuit that terminates at a specific resistance by turning off an internal switch means when the current value for authentication is equal to or less than a specific value; Later, when DC power is superimposed on the data transmission / reception line from the power supply hub, power is supplied to the IP telephone by turning on the internal switch means.

そして、本発明によれば、認証用回路によって、認証の終了後に、データ送受信線に給電ハブから直流電力が重畳された際に、内部のスイッチ手段をオンすることによってＩＰ電話機への給電を可能とするため、例えば、ＩＥＥＥ８０２．３ａｆ方式の給電ハブから方式Ａに対応したＩＰ電話機への給電が可能となり、方式Ａにのみ対応したＩＰ電話機であっても給電を受けることが可能となる。 According to the present invention, the authentication circuit can supply power to the IP telephone by turning on the internal switch means when DC power is superimposed on the data transmission / reception line from the power supply hub after the authentication is completed. Therefore, for example, power can be supplied from an IEEE 802.3af type power supply hub to an IP telephone that is compatible with system A, and even an IP telephone that is compatible only with system A can be supplied with power.

また、本発明は、給電を開始する前に認証用信号を送信データ線から受信データ線に対して送出し、受信した認証信号で特定のインピーダンスを検出することにより給電を開始し、給電電流が特定のピーク値を超えない限り給電を継続する第１の給電ハブとＬＡＮを介して接続可能であるとともに、給電を開始する前に特定の電圧以下の認証用電流を送信データ線から受信データ線に対して送出し、受信した認証電流で給電を開始する第２の給電ハブとＬＡＮを介して接続可能なＩＰ電話機であって、前記第１の給電ハブとの認証用のインピーダンス素子と、前記第１の給電ハブとの認証の終了後に、データ送受信線を前記インピーダンス素子から切り離し、該データ送受信線に前記第１の給電ハブから直流電力が重畳されるように回路を切り替え、該ＩＰ電話機への給電を可能とする回路切替手段とを備えるとともに、前記第２の給電ハブとの認証用の電流値が特定の値以下の場合には、内部のスイッチ手段をオフすることにより特定の抵抗で終端する認証用回路を備え、前記第２の給電ハブとの認証の終了後に、データ送受信線に前記給電ハブから直流電力が重畳された際に、前記内部のスイッチ手段をオンすることにより、該ＩＰ電話機への給電を可能とすることを特徴とする。 In addition, the present invention sends an authentication signal from the transmission data line to the reception data line before starting the power supply, starts the power supply by detecting a specific impedance with the received authentication signal, and the power supply current is It can be connected via a LAN to a first power supply hub that continues to supply power as long as it does not exceed a specific peak value, and an authentication current below a specific voltage is sent from the transmission data line to the reception data line before starting the power supply. An IP telephone that is connectable via a LAN to a second power supply hub that starts sending power with the received authentication current, the impedance element for authentication with the first power supply hub, After authentication with the first power supply hub is completed, the data transmission / reception line is disconnected from the impedance element, and the circuit is turned off so that DC power is superimposed on the data transmission / reception line from the first power supply hub. In addition, a circuit switching unit that enables power supply to the IP telephone is provided, and when the current value for authentication with the second power supply hub is equal to or lower than a specific value, the internal switch unit is turned off. An authentication circuit that terminates at a specific resistance, and when the DC power from the power supply hub is superimposed on the data transmission / reception line after authentication with the second power supply hub, By turning it on, power can be supplied to the IP telephone.

そして、本発明によれば、例えば、方式Ａに対応した給電ハブ及びＩＥＥＥ８０２．３ａｆ方式に対応した給電ハブのいずれからも給電を受けることのできるＩＰ電話機を提供することができる。 According to the present invention, for example, it is possible to provide an IP telephone that can receive power from either a power supply hub compatible with the system A or a power supply hub compatible with the IEEE 802.3af system.

本発明によれば、方式Ａにのみ対応したＩＰ電話機に対してＩＥＥＥ８０２．３ａｆ方式の給電ハブからの給電が可能で、ＩＥＥＥ８０２．３ａｆ方式にのみ対応したＩＰ電話機に対しても方式Ａの給電ハブから給電が可能なＩＰ電話機給電方式変換アダプタ及びＩＰ電話機等を提供することができる。 According to the present invention, it is possible to supply power from an IEEE 802.3af system power supply hub to an IP telephone that supports only the system A, and also to an IP telephone that supports only the IEEE 802.3af system. It is possible to provide an IP telephone power supply system conversion adapter, an IP telephone, and the like that can supply power from the telephone.

図１（ａ）に示すように、本発明にかかるＩＰ電話機用給電方式変換アダプタ１は、例えば、方式Ａの給電ハブ２とＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３の間に接続され、方式Ａの給電ハブ２からの電力をＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３に送出するとともに、データの送受信を行う。 As shown in FIG. 1A, a power supply system conversion adapter 1 for an IP telephone according to the present invention is connected between, for example, a power supply hub 2 of a system A and an IP telephone 3 of an IEEE 802.3af system. The power from the power supply hub 2 is transmitted to the IEEE 802.3af IP telephone 3 and data is transmitted and received.

また一方で、図１（ｂ）に示すように、ＩＰ電話機用給電方式変換アダプタ１は、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４と方式ＡのＩＰ電話機５の間に接続され、ＩＥＥＥ８０２．３ａｆ給電ハブ４からの電力を方式ＡのＩＰ電話機５に送出するとともにデータの送受信を行う。 On the other hand, as shown in FIG. 1B, the power supply system conversion adapter 1 for an IP telephone is connected between an IEEE 802.3af system power supply hub 4 and a system A IP telephone 5 to provide an IEEE 802.3af power supply hub. 4 transmits power to the IP telephone 5 of the method A and transmits / receives data.

このＩＰ電話機用給電方式変換アダプタ１は、図２に示すように、給電ハブ側ＬＡＮコネクタ１１と、データ伝送・電流重畳用の変圧器１２、１８と、方式Ａ用インピーダンス１３と、リレー１４〜１７と、ダイオードブリッジ１９と、ＩＥＥＥ８０２．３ａｆ認証回路２０と、突入電流防止用の定電流回路２１と、ＩＰ電話機側ＬＡＮコネクタ２２と、データ送信線２３、２５と、データ受信線２４、２６から構成されている。 As shown in FIG. 2, the power supply method conversion adapter 1 for the IP telephone includes a power supply hub side LAN connector 11, transformers 12 and 18 for data transmission / current superposition, impedance A for method A, relays 14 to 17, diode bridge 19, IEEE 802.3af authentication circuit 20, inrush current prevention constant current circuit 21, IP telephone side LAN connector 22, data transmission lines 23 and 25, and data reception lines 24 and 26. It is configured.

次に、上記構成を有するＩＰ電話機給電方式変換アダプタの動作について説明する。まず、図１（ａ）に示すように、ＩＰ電話機用給電方式変換アダプタ１が、方式Ａの給電ハブ２とＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３間に接続された場合の動作を説明する。 Next, the operation of the IP telephone power feeding system conversion adapter having the above configuration will be described. First, as shown in FIG. 1A, the operation when the power supply system conversion adapter 1 for an IP telephone is connected between the power supply hub 2 of the system A and the IP telephone 3 of the IEEE 802.3af system will be described.

方式Ａの給電ハブ２は、給電ハブ側ＬＡＮコネクタ１１に認証信号を送出する。認証信号は、データ送信線２３及び変圧器１２を介し、リレー１４、１５に送出される。その際、リレー１４〜１７は、方式Ａの給電ハブ２から直流電力を供給されていない状態であるため、リレー１４〜１８の接点は１側にあり、認証信号は、リレー１４、１５の１側、方式Ａ認証用インピーダンス１３、リレ−１６、１７の１側、変圧器１２、データ受信線２４、給電ハブ側ＬＡＮコネクタ１１を介し、方式Ａの給電ハブ２に戻る。 The power supply hub 2 of method A sends an authentication signal to the power supply hub side LAN connector 11. The authentication signal is sent to the relays 14 and 15 via the data transmission line 23 and the transformer 12. At that time, since the relays 14 to 17 are in a state where DC power is not supplied from the power supply hub 2 of the method A, the contacts of the relays 14 to 18 are on the 1 side, and the authentication signal is 1 of the relays 14 and 15. Return to the system A power supply hub 2 via the side, the system A authentication impedance 13, one side of the relays 16 and 17, the transformer 12, the data reception line 24, and the power supply hub side LAN connector 11.

方式Ａの給電ハブ２は、この受信した認証信号によって方式ＡのＩＰ電話機が接続されたと認識することができるので、データ送信線２３及びデータ受信線２４に直流電力を重畳する。この重畳された電力によって、リレー１４〜１７のコイルに電流が流れ、リレー１４〜１７の接点は２側になる。従って、各信号は次に示すようになり、方式Ａの給電ハブ２とＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３間のデータ送受信及び電源供給を実現している。 Since the power supply hub 2 of the system A can recognize that the IP telephone of the system A is connected by the received authentication signal, the DC power is superimposed on the data transmission line 23 and the data reception line 24. With this superimposed power, a current flows through the coils of the relays 14 to 17, and the contacts of the relays 14 to 17 are on the second side. Accordingly, each signal is as follows, and data transmission / reception and power supply between the power supply hub 2 of the system A and the IP telephone 3 of the IEEE 802.3af system are realized.

送信データは、方式Ａの給電ハブ２、給電ハブ側ＬＡＮコネクタ１１、データ送信線２３、変圧器１２、リレ−１４、１５の２側、変圧器１８、データ送信線２５、ＩＰ電話機側ＬＡＮコネクタ２２、ＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３の順で送信される。 Transmission data includes the power supply hub 2 of the system A, the power supply hub side LAN connector 11, the data transmission line 23, the transformer 12, the two sides of the relays 14 and 15, the transformer 18, the data transmission line 25, and the IP telephone side LAN connector. 22 and are transmitted in the order of the IP telephone 3 of the IEEE 802.3af system.

受信データは、ＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３、ＩＰ電話機側ＬＡＮコネクタ２２、データ受信線２６、変圧器１８、リレ−１６、１７の２側、変圧器１２、データ受信線２４、給電ハブ側ＬＡＮコネクタ１１、方式Ａの給電ハブ２の順で受信する。 The received data includes the IP telephone 3 of the IEEE 802.3af system, the IP telephone side LAN connector 22, the data reception line 26, the transformer 18, the relays 16 and 17, the two sides, the transformer 12, the data reception line 24, and the feeding hub side. Reception is performed in the order of the LAN connector 11 and the system A power supply hub 2.

電源供給の際には、方式Ａの給電ハブ２は、給電ハブ側ＬＡＮコネクタ１１を介し、データ送信線２３、データ受信線２４に直流電力を重畳する。直流電力は、変圧器１２、ダイオードブリッジ１９、ＩＥＥＥ８０２．３ａｆ認証回路２０、定電流回路２１、変圧器１８を介し、データ送信線２５、データ受信線２６に直流電力を重畳し、ＩＰ電話機側ＬＡＮコネクタ２２を介し、ＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３へ電力を供給する。ここで、定電流回路２１は、方式Ａの給電ハブ２の規定にあるピーク電流値を満足させるために電流を制限している。 At the time of power supply, the power supply hub 2 of method A superimposes DC power on the data transmission line 23 and the data reception line 24 via the power supply hub side LAN connector 11. The DC power is superimposed on the data transmission line 25 and the data reception line 26 via the transformer 12, the diode bridge 19, the IEEE 802.3af authentication circuit 20, the constant current circuit 21, and the transformer 18. Power is supplied to the IEEE 802.3af IP telephone 3 via the connector 22. Here, the constant current circuit 21 limits the current in order to satisfy the peak current value defined in the regulation of the power feeding hub 2 of the method A.

第２に、ＩＰ電話機用給電方式変換アダプタ１が、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４と方式ＡのＩＰ電話機５間に接続された場合の動作を説明する。 Second, the operation when the power supply system conversion adapter 1 for an IP telephone is connected between the power supply hub 4 of the IEEE 802.3af system and the IP telephone 5 of the system A will be described.

まず、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４は、給電ハブ側ＬＡＮコネクタ１１に１５Ｖ以下の電圧で認証電流を送出する。認証電流は、データ送信線２３、変圧器１２、ダイオードブリッジ１９、ＩＥＥＥ８０２．３ａｆ認証回路２０へ送られる。ＩＥＥＥ８０２．３ａｆ認証回路２０は、電圧が１５Ｖ以下の場合、内部のスイッチをＯＦＦし、約２５ｋΩの抵抗で終端する。したがって、この約２５ｋΩの抵抗を通り、ダイオードブリッジ１９、変圧器１２、データ受信線２４の順に流れ、給電ハブ側ＬＡＮコネクタ１１を介して、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４に戻る。 First, the IEEE 802.3af type power supply hub 4 sends an authentication current to the power supply hub side LAN connector 11 at a voltage of 15 V or less. The authentication current is sent to the data transmission line 23, the transformer 12, the diode bridge 19, and the IEEE 802.3af authentication circuit 20. When the voltage is 15 V or less, the IEEE 802.3af authentication circuit 20 turns off the internal switch and terminates with a resistance of about 25 kΩ. Therefore, it passes through the resistance of about 25 kΩ, flows in the order of the diode bridge 19, the transformer 12, and the data reception line 24, and returns to the power supply hub 4 of the IEEE 802.3af system via the power supply hub side LAN connector 11.

ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４は、この認証電流によってＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機が接続されたと認識することができるので、データ送信線２３、データ受信線２４に４８Ｖの直流電力を重畳する。この重畳された電圧によってＩＥＥＥ８０２．３ａｆ認証回路２０内部のスイッチがＯＮすると同時に、リレー１４〜１７のコイルに電流が流れ、リレー１４〜１７の接点は２側になる。よって、各信号は次に示すようになり、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４と方式ＡのＩＰ電話機５間のデータ送受信及び電源供給を実現している。 The IEEE 802.3af system power supply hub 4 can recognize that the IEEE 802.3af system IP telephone is connected by this authentication current, and thus superimposes 48V DC power on the data transmission line 23 and the data reception line 24. At the same time as the switch in the IEEE 802.3af authentication circuit 20 is turned on by this superimposed voltage, a current flows through the coils of the relays 14 to 17, and the contacts of the relays 14 to 17 are on the second side. Accordingly, each signal is as shown below, and data transmission / reception and power supply between the IEEE 802.3af system power supply hub 4 and the system A IP telephone 5 are realized.

送信データは、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４、給電ハブ側ＬＡＮコネクタ１１、データ送信線２３、変圧器１２、リレ−１４、１５の２側、変圧器１８、データ送信線２５、ＩＰ電話機側ＬＡＮコネクタ２２、方式ＡのＩＰ電話機５の順で送信される。 The transmission data includes the IEEE 802.3af system power supply hub 4, the power supply hub side LAN connector 11, the data transmission line 23, the transformer 12, the relays 14 and 15, the two sides, the transformer 18, the data transmission line 25, and the IP telephone side. The data is transmitted in the order of the LAN connector 22 and the IP phone 5 of the method A.

受信データは、方式ＡのＩＰ電話機５、ＩＰ電話機側ＬＡＮコネクタ２６、変圧器１８、リレ−１６、１７の２側、変圧器１２、データ受信線２４、給電ハブ側ＬＡＮコネクタ１１、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４の順で受信する。 The received data includes the IP telephone 5 of the method A, the IP telephone side LAN connector 26, the transformer 18, the relays 16 and 17, the two sides, the transformer 12, the data reception line 24, the power supply hub side LAN connector 11, and IEEE 802.3af. Reception is performed in the order of the power supply hub 4 of the system.

電源供給の際には、ＩＥＥＥ８０２．３ａｆ方式の給電ハブ４は、給電ハブ側ＬＡＮコネクタ１１を介し、データ送信線２３、データ受信線２４に直流電力を重畳する。直流電力は、変圧器１２、ダイオードブリッジ１９、ＩＥＥＥ８０２．３ａｆ認証回路２０、定電流回路２１、変圧器１８を介し、データ送信線２５、データ受信線２６に直流電力を重畳し、ＩＰ電話機側ＬＡＮコネクタ２２を介し、ＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機３へ電力を供給する。 When supplying power, the IEEE 802.3af type power supply hub 4 superimposes DC power on the data transmission line 23 and the data reception line 24 via the power supply hub side LAN connector 11. The DC power is superimposed on the data transmission line 25 and the data reception line 26 via the transformer 12, the diode bridge 19, the IEEE 802.3af authentication circuit 20, the constant current circuit 21, and the transformer 18. Power is supplied to the IEEE 802.3af IP telephone 3 via the connector 22.

尚、上記実施の形態においては、定電流回路２１は、方式Ａに規定されているピーク電流を防止する目的で設けたので、消費電力が小さくピーク電流が小さい場合には不要で、ジャンパー等に置き換えることが可能である。 In the above embodiment, the constant current circuit 21 is provided for the purpose of preventing the peak current defined in the method A. Therefore, the constant current circuit 21 is not necessary when the power consumption is small and the peak current is small. It is possible to replace it.

また、上記回路をＩＰ電話機に内蔵することによって、方式ＡとＩＥＥＥ８０２．３ａｆの両方に対応したＩＰ電話機を実現することができる。 Further, by incorporating the above circuit in the IP telephone, it is possible to realize an IP telephone that is compatible with both system A and IEEE 802.3af.

本発明にかかるＩＰ電話機給電方式変換アダプタの使用例を説明するためのブロック図である。It is a block diagram for demonstrating the usage example of the IP telephone power feeding system conversion adapter concerning this invention. 本発明にかかるＩＰ電話機給電方式変換アダプタの全体構成を示すブロック図である。It is a block diagram which shows the whole structure of the IP telephone power feeding system conversion adapter concerning this invention. 従来のＩＰ電話機の一例を示すブロック図である。It is a block diagram which shows an example of the conventional IP telephone. 従来のＩＰ電話機給電方式変換アダプタの一例を示すブロック図である。It is a block diagram which shows an example of the conventional IP telephone power feeding system conversion adapter.

Explanation of symbols

１ＩＰ電話機用給電方式変換アダプタ
２方式Ａの給電ハブ
３ＩＥＥＥ８０２．３ａｆ方式のＩＰ電話機
４ＩＥＥＥ８０２．３ａｆ給電ハブ
５方式ＡのＩＰ電話機
１１給電ハブ側ＬＡＮコネクタ
１２変圧器
１３方式Ａ認証用インピーダンス
１４リレ−
１５リレ−
１６リレ−
１７リレ−
１８変圧器
１９ダイオードブリッジ
２０ＩＥＥＥ８０２．３ａｆ認証回路
２１定電流回路
２２ＩＰ電話機側ＬＡＮコネクタ
２３データ送信線
２４データ受信線
２５データ送信線
２６データ受信線 DESCRIPTION OF SYMBOLS 1 Power supply system conversion adapter for IP telephone 2 System A power supply hub 3 IEEE802.3af system IP telephone 4 IEEE802.3af power supply hub 5 System A IP telephone 11 Power supply hub side LAN connector 12 Transformer 13 System A authentication impedance 14 Relay
15 relay
16 Relay
17 Relay
18 Transformer 19 Diode bridge 20 IEEE 802.3af authentication circuit 21 Constant current circuit 22 IP telephone side LAN connector 23 Data transmission line 24 Data reception line 25 Data transmission line 26 Data reception line

Claims

An IP telephone connected to the LAN, and before starting to supply power to the IP telephone, an authentication signal is transmitted from the transmission data line to the reception data line, and power is supplied by detecting a specific impedance with the received authentication signal. An IP telephone power supply conversion adapter that can be connected to a power supply hub that continues power supply unless the power supply current exceeds a specific peak value,
The authentication impedance element;
After the authentication is completed, a circuit switching unit that disconnects the data transmission / reception line from the impedance element, switches the circuit so that DC power is superimposed on the data transmission / reception line from the power supply hub, and enables power supply to the IP telephone. An IP telephone power supply system conversion adapter characterized by comprising:

2. The IP telephone power supply according to claim 1, further comprising a constant current circuit for limiting a maximum current flowing through the circuit when the circuit is switched so that DC power is superimposed on the data transmission / reception line. Method conversion adapter.

An IP telephone connected to the LAN and an authentication current lower than a specific voltage are sent from the transmission data line to the reception data line before power supply to the IP telephone is started, and power supply is started with the received authentication current. An IP telephone power supply conversion adapter that can be connected to a power supply hub,
If the current value for authentication is equal to or less than a specific value, an authentication circuit that terminates with a specific resistance by turning off the internal switch means,
After the authentication is completed, when DC power is superimposed on the data transmission / reception line from the power supply hub, power is supplied to the IP telephone by turning on the internal switch means. Telephone power supply conversion adapter.

An IP telephone connected to the LAN, and before starting to supply power to the IP telephone, an authentication signal is transmitted from the transmission data line to the reception data line, and power is supplied by detecting a specific impedance with the received authentication signal. Can be connected to the first power supply hub that continues power supply as long as the power supply current does not exceed a specific peak value,
Before starting to supply power to the IP telephone connected to the LAN, the authentication current below a specific voltage is sent from the transmission data line to the reception data line, and power supply is started with the received authentication current. An IP telephone feeding method conversion adapter connectable to a second feeding hub,
An impedance element for authentication with the first feeding hub;
After completion of authentication with the first power supply hub, the data transmission / reception line is disconnected from the impedance element, and the circuit is switched so that DC power is superimposed on the data transmission / reception line from the first power supply hub. Circuit switching means that enables power supply to the power supply,
When the current value for authentication with the second power supply hub is equal to or less than a specific value, an authentication circuit is provided that terminates with a specific resistance by turning off the internal switch means,
After the end of authentication with the second power supply hub, when DC power is superimposed on the data transmission / reception line from the second power supply hub, the internal switch means is turned on to supply power to the IP telephone. An IP telephone power feeding system conversion adapter characterized in that

Before starting power supply, an authentication signal is sent from the transmission data line to the reception data line, power supply is started by detecting a specific impedance in the received authentication signal, and the power supply current exceeds a specific peak value An IP telephone that can be connected via a LAN with a power supply hub that continues power supply unless otherwise
The authentication impedance element;
After the authentication is completed, a circuit switching means that disconnects the data transmission / reception line from the impedance element, switches the circuit so that DC power is superimposed on the data transmission / reception line from the power supply hub, and enables power supply to the IP telephone. An IP telephone comprising:

5. The IP telephone according to claim 4, further comprising a constant current circuit for limiting a maximum current flowing through the circuit when the circuit is switched so that DC power is superimposed on the data transmission / reception line.

An IP telephone that can be connected via a LAN to a power supply hub that sends an authentication current below a specific voltage from the transmission data line to the reception data line before starting power supply and starts power supply with the received authentication current. There,
If the current value for authentication is equal to or less than a specific value, an authentication circuit that terminates with a specific resistance by turning off the internal switch means,
After the authentication is finished, when DC power is superimposed on the data transmission / reception line from the power supply hub, the IP telephone can be powered by turning on the internal switch means. Phone.

Before starting power supply, an authentication signal is sent from the transmission data line to the reception data line, power supply is started by detecting a specific impedance in the received authentication signal, and the power supply current exceeds a specific peak value As long as there is no connection with the first power supply hub that continues power supply through the LAN,
Before starting feeding, authentication current below a specific voltage is sent from the transmission data line to the receiving data line, and can be connected to the second feeding hub that starts feeding with the received authentication current via the LAN. An IP phone,
An impedance element for authentication with the first feeding hub;
After the authentication with the first power supply hub is completed, the data transmission / reception line is disconnected from the impedance element, and the circuit is switched so that DC power is superimposed on the data transmission / reception line from the first power supply hub. Circuit switching means that enables power supply to the power supply,
When the current value for authentication with the second power supply hub is equal to or less than a specific value, an authentication circuit is provided that terminates with a specific resistance by turning off the internal switch means,
After the end of authentication with the second power supply hub, when DC power is superposed on the data transmission / reception line from the power supply hub, power can be supplied to the IP telephone by turning on the internal switch means. An IP phone characterized by: