KR20040028416A - VoIP phone capable of switching to analog phone - Google Patents

Abstract

PURPOSE: A VoIP phone switchable to an analog phone is provided to add a telephone network interface and a functional selector to the VoIP phone, and to be switched into an analog phone if power is not supplied to the VoIP phone, thereby making a call with the analog phone instead of the VoIP phone. CONSTITUTION: An LAN I/F(Interface)(100) supplies an interface to an LAN. A voice signal processor(200) converts packet data received through the LAN I/F(100) into a voice signal, codes the voice signal, and converts the coded voice signal into packet data. A telephone network I/F(600) supplies an interface to a PSTN. A voice signal input/output unit(300) supplies a voice signal input/output interface to a user. A functional selector(700) selects either the voice signal processor(200) or the telephone network I/F(600), and connects the selected unit with the voice signal input/output unit(300). A power supplier(500) supplies power to the LAN I/F(100), the voice signal processor(200), the telephone network I/F(600), the voice signal input/output unit(300), and the functional selector(700).

Description

VuIP phone capable of switching to analog phone

The present invention relates to a VoIP phone, and more particularly, to a VoIP phone that can be switched to a general phone.

Voice Over Internet Protocol (VoIP) is a term that refers to IP telephony technology for a series of facilities that use IP to transmit voice information. In general, this means that voice information is sent digitally in discrete packets, rather than traditional protocols based on circuits, such as the Public Switched Telephone Network (PSTN). The main advantage of the VoIP and Internet telephony technology is that by integrating the telephone service using the existing IP network, telephone users can receive long-distance and international telephony service in the Internet and intranet environment with only local call charges.

The VoIP phone refers to a phone for providing a telephone service using such VoIP, and a schematic functional block for VoIP is shown in FIG. Referring to FIG. 1, a VoIP phone according to a conventional embodiment includes a LAN-interface (I / F) unit 10, a voice signal processor 20, a voice signal input / output unit 30, and a controller 40. And a power supply unit 50.

The conventional VoIP phone having such a configuration operates as follows.

First, the LAN I / F unit 10 is a device that provides an interface with a predetermined LAN cable (eg, a twisted pair or Baynet Coaxial cable, etc.) and receives packet data from the LAN cable. Then, the packet data to be transmitted to the LAN is transferred to the LAN cable. That is, the LAN I / F unit 10 receives the packet data transmitted from the LAN network, transmits the packet data to the voice signal processor 20, and transmits the packet data transmitted from the voice signal processor 20 to the LAN network.

The voice signal processing unit 20 processes the packet data transferred from the LAN I / F unit 10 to extract a voice signal, and then transfers the voice signal to the voice signal input / output unit 30, and then inputs / outputs the voice signal. The voice signal input through the unit 30 is encoded and converted into packet data in the form of TCP / IP, and then transmitted to the LAN I / F unit 10 for transmission to the LAN network. .

The voice signal input / output unit 30 outputs a voice signal transmitted from the voice signal processor 20 to a VoIP phone user, inputs the user's voice, and transmits the voice signal to the voice signal processor 20. This part is connected to the handset.

At this time, the LAN I / F unit 10, the voice signal processing unit 20, and the voice signal input / output unit 30 are controlled by the controller 40 to operate as described above.

On the other hand, since each of the devices 10 to 40 must use a complex electronic circuit, a power supply of a predetermined capacity or more is required, and such power is provided from the power supply unit 50. Therefore, when the power supply is disconnected due to a power failure, an emergency occurrence, or carelessness, the respective devices 10 to 40 cannot operate normally, and thus, the communication network is also disconnected. That is, even if a hub, a router, or a server is alive in the LAN network, when the power of the corresponding phone is disconnected, communication using the telephone is also disconnected.

In order to solve this disadvantage, it is possible to consider a method of embedding an emergency battery (battery) inside. In this case, however, the phone is expensive, expensive, and the internal circuitry is complicated.

Accordingly, the present invention has been made to solve the above problems, an object of the present invention is to add a telephone network interface and a function selection unit inside the VoIP phone when the power is not supplied to the VoIP phone for reasons such as power outages. The present invention provides a VoIP phone characterized in that a VoIP phone is replaced with an ordinary phone so that a call can be made to a general phone instead of a VoIP phone.

1 is a schematic functional block diagram of a VoIP phone according to a conventional embodiment;

2 is a schematic functional block diagram of a VoIP phone according to an embodiment of the present invention;

3 is a schematic circuit diagram of a function selection unit according to an embodiment of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

100: LAN I / F unit 200: voice signal processing unit

300: audio signal input / output unit 400: control unit

500: power supply unit 600: telephone network I / F unit

700: function selection

In order to achieve the above object, the VoIP phone provided in the present invention includes a LAN interface unit that provides an interface with a LAN; A voice signal processing unit converting the packet data received through the LAN interface unit into a voice signal, and encoding the voice signal to be transmitted to the LAN interface unit to convert the packet data into packet data; A telephone network interface unit providing an interface with a general telephone network (PSTN); A voice signal input / output unit for providing a voice signal input / output interface with a user; A function selection unit for selecting one of the voice signal processing unit and the telephone network interface unit by external control and connecting the voice signal input / output unit; And a power supply unit supplying power to the LAN interface unit, the voice signal processing unit, the telephone network interface unit, the voice signal input / output unit, and the function selection unit.

Hereinafter, preferred embodiments of a VoIP phone switchable to a general phone provided by the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic functional block diagram of a VoIP phone according to an embodiment of the present invention, Figure 3 is a schematic circuit diagram of a function selection unit according to an embodiment of the present invention.

Referring to FIG. 2, the VoIP phone according to an embodiment of the present invention includes a LAN I / F unit 100, a voice signal processing unit 200, a voice signal input / output unit 300, a controller 400, , A power supply unit 500, a telephone network I / F unit 600, and a function selection unit 700.

The LAN I / F unit 100 provides an interface with a LAN. That is, the LAN I / F unit 100 is an apparatus that provides an interface with a predetermined LAN cable (for example, a twisted pair or Baynet Coaxial (BNC) cable, etc.) and receives packet data from the LAN cable. Then, it transmits the packet data to be transmitted to LAN. In the example of FIG. 2, the LAN I / F unit 100 receives the packet data transmitted from the LAN network, transmits the packet data to the voice signal processing unit 200, and transmits the packet data transferred from the voice signal processing unit 200 to the LAN network.

The voice signal processing unit 200 converts the packet data received through the LAN I / F unit 100 into a voice signal, encodes a voice signal to be transmitted to the LAN I / F unit 100, and converts it to TCP. Convert to packet data in / IP format. At this time, since predetermined algorithms for converting packet data and voice signals are already known techniques, a detailed description of such algorithms is omitted.

The telephone network I / F unit 600 provides an interface with a general telephone network (PSTN). That is, the telephone network I / F unit 600 is a device for transmitting signals transmitted through the general telephone network to the voice signal input / output unit 300 under a specific condition (for example, when power supply is interrupted, such as a power failure). . To this end, the telephone network I / F unit 600 supplies power from a tip or ring signal input through devices such as a central office (CO) or a private branch exchange (PBX). The voice signal is separated and transmitted to the voice signal input / output unit 300, and the voice signal transmitted to the voice signal input / output unit 300 is transmitted to the general telephone network (PSTN). In addition, the telephone network I / F unit 600 separates power from signals transmitted through a general telephone network (PSTN) (eg, a tip, a ring, etc.) and supplies its own operating power to the power supply unit. Even if the power supply is disconnected from the 500, there is a feature that can operate normally.

The voice signal input / output unit 300 provides a voice signal input / output interface with a user. That is, the voice signal input / output unit 300 outputs the voice signal transmitted through the voice signal processing unit 200 or the telephone network I / F unit 600 to the user, and inputs the user's voice to the voice signal processing unit ( 200) or a device for transmitting to the telephone network I / F unit 600, which is connected to the handset of the telephone.

Meanwhile, the function selecting unit 700 selects one of the voice signal processing unit 200 or the telephone network I / F unit 600 by external control and connects the voice signal input / output unit 300. In particular, in order to make up for the shortcomings of the conventional call disconnection through the VoIP phone, the function selector 700 is powered through the power supply unit 500, and the user selects the VoIP phone function. 200 is connected to the voice signal input / output unit 300, otherwise (if power is not applied or the general phone function is selected), the telephone network I / F unit 600 and the voice signal input / output unit ( 300).

In this case, the LAN I / F unit 100, the voice signal processing unit 200, the function selection unit 700, the telephone network I / F unit 600, and the voice signal input / output unit 300 operate as described above. In order to be controlled by the control unit 400, the power supply unit 500 is responsible for supplying power required when the devices 100 to 400 and 600 to 700 operate.

3 is a schematic circuit diagram of a function selection unit 700 according to an embodiment of the present invention. Referring to FIG. 3, the function selection unit 700 includes an AND gate 710 and three terminals. And a relay 720 for switching the connection of each terminal in response to the output signal of the AND gate 710.

AND gate 710 has one input terminal connected to a power supply unit (Vcc) and the other input terminal is connected to a user select operation unit (not shown) so that power is supplied from the power supply unit (Vcc) and the user operation state is selected for the VoIP phone. In the case of a state, a "high" signal is outputted; otherwise, a "low" signal is outputted (when power is not applied or the user operation state is a general phone selection state).

The relay 720 includes three terminals, that is, three terminals connected to each of the voice signal input / output unit 300, the voice signal processing unit 200, and the telephone network I / F unit 600, and the AND gate 710. When a 'high' signal is outputted from the terminal, the terminal connected to the voice signal input / output unit 300 is connected to the terminal connected to the voice signal processing unit 200, and 'low' from the AND gate 710. When the signal is output, connect the terminal connected to the voice signal input / output unit 300 with the terminal connected to the telephone network I / F unit 600.

In the example of FIG. 3, when power is supplied to the function selection unit 700, the connection relation between the terminals of the relay 720 is indicated by a dotted line, and the power supply is interrupted or when the user selects the general phone function. The connection relationship between the terminals is indicated by a solid line.

Therefore, when the user selects the VoIP phone function to use the VoIP phone, when the power supply Vcc is disconnected for the same reason as a power failure, the relay 720 is in contact with the voice signal processor 200 performing the VoIP phone function. In the state is contacted to the telephone network I / F unit 600 performing the general phone function is a call to the general phone.

Although the preferred embodiments of the present invention have been described in detail above, those skilled in the art will appreciate that the present invention may be modified without departing from the spirit and scope of the invention as defined in the appended claims. It will be appreciated that modifications or variations may be made. Therefore, changes in the future embodiments of the present invention will not be able to escape the technology of the present invention.

As described above, the present invention adds a telephone network interface unit and a function selection unit to the VoIP phone, thereby switching the VoIP phone to an analog phone even when no power is supplied to the VoIP phone due to a power failure or the like. There is an advantage that can be prevented. In addition, the added value can be increased by the combination of VoIP phone function, and there is an effect that can increase the stability and reliability of the product through the power failure countermeasure function.

Claims (5)

A LAN interface unit that provides an interface with a LAN; A voice signal processing unit converting the packet data received through the LAN interface unit into a voice signal, and encoding the voice signal to be transmitted to the LAN interface unit to convert the packet data into packet data; A telephone network interface unit providing an interface with a general telephone network (PSTN); A voice signal input / output unit for providing a voice signal input / output interface with a user; A function selection unit for selecting one of the voice signal processing unit and the telephone network interface unit by external control and connecting the voice signal input / output unit; And Vio IP phone switchable to a general phone, characterized in that it comprises a power supply for supplying power to the LAN-interface unit, voice signal processing unit, telephone network-interface unit, voice signal input / output unit and function selection unit. The telephone network interface unit of claim 1, wherein the telephone network interface unit is used. The BIO IP phone can be switched to a general phone, characterized in that to separate the power and voice signal from the signals transmitted from a general telephone network (PSTN) and output only the voice signal, the power is used as its own operating power. The method of claim 1, wherein the function selection unit When the power is supplied through the power supply unit, the voice signal processing unit and the voice signal input / output unit are connected. Otherwise (when power is not applied due to power failure, etc.), the telephone network interface unit and the voice signal input / output unit are connected. Bio IP phone switchable to a normal phone, characterized in that for connecting the output. The method of claim 1 or 3, wherein the function selection unit One input terminal is connected to the power supply unit and the other input terminal is connected to a user selection operation unit, and outputs a 'high' signal when power is supplied from the power supply unit and the user operation state is the BUI IP phone selection state. If not (when the power is not transferred or the user operation state is the general phone selection state), logical AND means for outputting a 'low' signal; And And three terminals connected to each of the voice signal input / output unit, the voice signal processing unit, and the telephone network interface unit, and are connected to the voice signal input / output unit when a 'high' signal is output from the logical product. A relay unit for connecting a terminal to a terminal connected to the voice signal processing unit and connecting a terminal connected to the voice signal input / output unit with a terminal connected to the telephone network interface unit when a low signal is output from the logic gate; Bio IP phone can be switched to a normal phone, characterized in that configured. The method of claim 4, wherein the user selection operation unit If the user wants to use the BUI IP phone, the user selects the BUI IP phone use function and outputs a 'high' signal by a logical product. When the user wants to use a general phone, the user selects the general phone function, and the BOO IP phone switchable to a general phone, characterized in that configured to output a 'low' signal by logical multiplication means.