KR20020071186A - Voice/Data Integrated Multi functional Access Apparatus - Google Patents

Abstract

PURPOSE: A multifunctional access device with a voice/data unified type is provided to unify voice and data signals and offer a voice and data through one telephone line. CONSTITUTION: A telephone exchange unit(210) encodes or decodes an analog signal inputted from the outside, and directly connects an extension to an office line when emergency situation is generated. A LAN(Local Area Network) switch unit(220) connects to a plurality of computers, and is switched so that the connected all computers exchange data each other. A control unit(230) connects to the telephone exchange unit(210) and the LAN switch unit(220), interfaces various signals provided from the telephone exchange unit(210), and controls the LAN switch(220) for receiving a data signal provided from the LAN switch unit(220) and providing the received data signal to a desired path. A LAN network connection unit(240) is located between the control unit(230) and an external xDSL(x Digital Subscriber Line) modem(270) for relaying transmitting/receiving data between the control unit(230) and the external xDSL modem(270). An xDSL modem(250) connects to the telephone exchange unit(210) and the control unit(230), and modulates/demodulates inputted data, and transmits the modulated/demodulated data to a corresponding path.

Description

Voice / Data Integrated Multi functional Access Apparatus}

The present invention relates to a voice / data integrated multifunction access device, and more particularly, to separate various voice / data signals inputted through one telephone line (network matching function, telephone exchange function, IP (Internet Protocol) sharing). Function, a digital subscriber line (xDSL) modem function, a voice-over-IP (VoIP) and a voice over digital subscriber line (VoDSL) function.

In recent years, the term Small Office Home Office (SOHO) has been widely used, and this SOHO refers to a business style of using a computer network to develop a business in a specific home or small office. In the recent SOHO type business, the necessity of information sharing has emerged rapidly with the advent of equipment for distribution, and the network and the Internet have become the basic environment for SOHO. The system required to build SOHO can be developed differently according to the purpose of use, so it is necessary to consider what system is most suitable for your environment.

Although there is no separate equipment for SOHO, many entry-level equipment is currently developed for SOHO, ie for small homes or offices, and can be deployed at low cost. In general, the purpose of SOHO is to provide a simple function to build a network with low cost and simple operation. Network equipment for SOHO includes basic LAN equipment such as small routers, hubs, and local area network (LAN) cards, as well as remote access equipment that supports WAN lines, such as a public switched telephone network (PSTN) or an integrated telecommunications network (ISDN). do.

In general, an exchange is used to connect to a public switched telephone network (PSTN) through a telephone or to a data communication network through a computer. A basic configuration diagram of an access device 100 of a network constructed in a general home or office is shown in FIG. 1, and the conventional access device 100 is a filter that separates voice and data signals input through an external telephone line. Converts the splitter 10 and the analog signal transmitted from the splitter 10 to a digital signal that can be processed by the personal computer 30 or transmits a digital signal transmitted from the personal computer 30 to the outside via a telephone line. Modem 20 to convert the analog signal to the telephone and the living room, home room, small room or each office installed a telephone 40 for making a voice call and a fax (50) to exchange the scanned data (text or image) consist of. The UTP (Unshielded Twisted Pair) cable connection between the splitter 10 and the modem 20 uses the RJ-11 standard, and the UTP cable connection between the modem 20 and the PC 30 uses the RJ-45 standard. The UTP cable connection between the 10 and the telephone 40, the splitter 10 and the fax 50 uses the RJ-11 standard. Here, the splitter 10 generally recognizes that the input frequency signal is a data signal if the input frequency signal is higher than the reference frequency band, and recognizes it as a voice signal if the input frequency signal is low. Since UTP cable consists of several strands, there are various connection methods depending on the number of strands and the purpose of use. Connection method in LAN uses EIA / TIA-568 standard. This standard requires the use of RJ-45 / RJ-11 connectors as defined by the Universal Service Order Codes (USOC). The USOC has been standardized by the FCC as a proposed connection standard for applications in telephone networks and related equipment. Since the USOC was created on the premise of a telephone network, EIA / TIA-568 is designed to be connected to the other pins except for the telephone, so it is basically a standard that is intended to be mixed with the telephone network. For example, LAN (i.e. Ethernet) is basically a 10 Mbps LAN that uses 4 wires (1-2, 3-6) and 8 wires (1-2, 3-6, 4-5, 100 Mbps LAN using 7-8). In addition, gigabit LANs having a speed of 100 times or more are commercially used.

However, the use of more than one telephone line is a cost burden, there is a problem that the service to the high-speed communication network is not yet widely provided in the communication network.

Korean Patent Laid-Open Publication No. 1997-64443 proposes a method of detecting a waiting signal during a call and switching the PC communication in use to a waiting mode during the call, and then using the PC communication again after completing the telephone call. However, this method raises the question of feasibility because the incoming call waiting signal is recognized as noise by the modem and all are error processed, so that the computer user does not actually know that the waiting call signal has arrived.

In addition, Korean Patent Publication No. 1998-77185 describes a method of using a telephone by detecting a waiting signal during a call when an external telephone is called while using an Internet television receiver. It is recognized that the object of the invention cannot be achieved because there is no way to detect this because all of the waiting signals are lost.

In contrast, U.S. Patent No. 4,852,151 describes a method for generating an alarm signal by detecting a loss of a carrier when there is an input of a waiting signal during a call. This method can be technically implemented, but since the loss of carrier is caused by noise in addition to the waiting signal during a call, there is a problem that an alarm occurs frequently even when the call is not a waiting signal.

U.S. Patent No. 5,287,401 describes a modem that detects a call waiting signal by detecting timings of a signal of 270 to 670 kHz and a call waiting signal using a carrier loss and a call progress filter. . However, this technology is implemented in the modem to convert the operation mode of the modem, the existing users must be replaced with a new modem, and in particular, it is pointed out that the alarm may be caused by noise other than the waiting signal during the call. have.

However, the conventional access device for simultaneously using such a telephone network and the Internet network has various problems. First, when the voice / data access devices are separately installed, they are inefficient in terms of cost and installation operation. Second, in the case of establishing a network by connecting a modem to a general telephone line, there is a problem that the telephone cannot be used when the Internet is used through a computer, and the Internet cannot be used when the telephone is used. In some cases, the telephone and the Internet can be used at the same time by using a dedicated cable and a dedicated modem (for example, when building a network with ADSL or ISDN). Cannot be used at the same time. Third, in the case of using a high-speed communication network such as ADSL or ISDN, provided voice / data services are shared only in subscriber lines, and only one voice service is provided per subscriber line. Therefore, conventional access devices are not suitable for offices where many people work.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the first object of the present invention is to integrate the voice and data signal to provide a voice and data services in one telephone line voice / data An integrated multifunction access device is provided.

A second object of the present invention is to control a call line in consideration of power, line state, and quality of service (QoS) state of a data network, thereby maintaining voice quality and providing uninterrupted phone service even in an emergency state. An integrated multifunction access device is provided.

It is a third object of the present invention to provide a voice / data integrated multifunction access device that uses a LAN hub and an IP sharing function to share a single IP address with multiple PCs and automatically assigns an IP address.

A fourth object of the present invention is to provide a voice / data integrated multifunction access device that implements VoIP and VoDSL equipment capable of performing a telephone network backup function.

A fifth object of the present invention is to realize a low-cost implementation of a telephone exchange, a VoIP / VoDSL, an IP router, an xDSL modem, an integrated access device (IAD), etc. with one access device, and provides a differentiated service by linking mutual functions. / Data integrated multifunction access device.

1 is a basic configuration diagram of an access device of a general network,

2 is an overall configuration diagram of a voice / data integrated multifunction access device according to the present invention;

3 is a detailed configuration diagram of the telephone exchange unit according to the present invention;

4 is a circuit diagram showing a configuration of an emergency trunk line switching unit according to the present invention;

5 is a detailed block diagram of a part of an access device according to the present invention.

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

210: telephone exchange unit 220: LAN switch unit

230: control unit 240: LAN network connection unit

250: xDSL modem unit 260: PSTN network

270: xDSL Modem 280: Internet

In order to achieve the above object, the present invention provides a voice / data integrated access device that separates voice and data signals into one telephone line to provide telephone service and network service, and encodes or decodes an analog signal input from the outside. A telephone exchange unit for switching an extension line directly to a trunk line when an emergency occurs; A LAN switch unit connected to a plurality of computers and switching so that all computers connected to the switch can exchange data; It is connected to the telephone exchange unit and LAN switch unit, and interfaces various signals applied from the telephone exchange unit, receives the data signal applied from the LAN switch unit, controls to switch to the desired path, and controls the functions of each component. A control unit for transmitting a control command signal; A LAN network connection unit located between the control unit and the external xDSL modem and relaying transmission / reception data between the control unit and the external xDSL modem; And an xDSL modem unit which is connected to a telephone exchange unit and a control unit and modulates / demodulates the input data and transmits the data through a corresponding path.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a voice / data integrated multifunction access device according to the present invention will be described in detail with reference to the accompanying drawings.

2 is an overall configuration diagram of a voice / data integrated multi-function access device 200 according to the present invention. The access device 200 includes a telephone exchange unit 210, a LAN switch unit 220, a control unit 230, and a LAN. The network connection unit 240 and the xDSL modem unit 250 are configured, and the PSTN network 260, the xDSL modem 270, and the Internet 280 are connected to the access device 200.

The telephone exchange unit 210 is connected to two solid lines (that is, a tip line (-48V) and a ring line (GND)), and an analog signal input from the outside (for example, DTMF (Dual Tone). Multi Frequency) signal, ring signal, and various tone signals] and functions to encode or decode and connect to the telephone corresponding to the telephone number input by the caller. In addition, it provides a function of supplying various tones (e.g., call signal, hook on / off signal, tone signal, ring signal, busy signal, etc.) required for a telephone call, and connects to the PSTN of the telephone company when the caller presses a CO line access code It also performs the function. Here, the DTMF signal is a signal for distinguishing each key signal. DTMF signals consist of two different frequencies (ie high and low frequencies) that cannot be simulated by human voices. Description of the telephone exchange unit 210 will be described later in detail with reference to FIGS.

The LAN switch unit 220 is connected to a plurality of computers, and performs a function of switching so that all stations connected to the switch can exchange data at the same time. The LAN switch unit 220 is a LAN using Dedicated Medium Switching technology, unlike a shared media LAN that allows only one specific station to use a bus at a given point in time. It is specially designed to eliminate the phenomenon. Parallel communication is the method by which multiple stations simultaneously communicate segments using multiple communication channels, a key concept in Ethernet switching. The LAN switch unit 220 is divided into a frame switch and a cell switch according to the format of the transmitted information. A switch that transmits a transmission unit having a variable length like an existing Ethernet frame is called a frame switch, and a representative frame switch is an Ethernet switch. There is. On the other hand, a switch that transmits a fixed length of transmission unit called a cell is called a cell switch. An exemplary cell switch is an Asynchronous Transfer Mode (ATM) switch.

The controller 230 is connected to the telephone exchange unit 210 and the LAN switch unit 220, interfaces various signals applied by the telephone exchange unit 210, and provides a data signal applied by the LAN switch unit 220. Receives and controls to switch to the desired path. It also performs a function of transmitting a clock signal for controlling each component. The control unit 230 will be described in detail later with reference to FIG. 5.

The LAN network connection unit 240 is connected to the control unit 230, and serves as a bridge for transmitting data transmitted between stations through the control unit 230. The LAN network connection unit 240 performs serial communication with the control unit 230 and uses a 10 / 100Base-T Ethernet transceiver capable of 10/100 automatic selection. Ethernet transceivers are used in devices in the local area network that actually use signals on the wires on the network and detect signals passing through the wires.In many local area networks, the Ethernet transceivers are mounted inside the network card, but in some types of networks external Requires an Ethernet transceiver. In Ethernet networks, transceivers are also called medium access units (MAUs).

The xDSL modem unit 250 is connected to the telephone exchange unit 210 and the controller 230, and realizes high-speed communication of several Mbit / s by using a copper copper cable. Recently, xDSL, which is attracting attention as a high-speed connection line technology for Internet access, is one of modem technologies that enables high-speed communication of hundreds of kbit / s to several Mbit / s using a subscriber line installed mainly for telephone. Unlike conventional modems, it transmits data even in high frequency bands. Normal modems use only low frequency bands below 4 kHz used for voice transmission, while xDSL modems also use high frequency bands from 20k to 1.1MHz. The bandwidth is usually 250 times higher than that of a modem, enabling high-speed data communications of several Mbit / s. There are five categories: Asymmetric Digital Subscriber Line (ADSL), High-rate DSL (HDSL), Symetric DSL (SDSL), Very High-Speed DSL (VDSL), and Rate-Adaptice DSL (RADSL).

In addition, the PSTN network is connected to the telephone exchange unit 210 of the present access device 200, and the external xDSL modem 270 is connected to the LAN network connection unit 240, and the internal xDSL modem unit 250 and the external type are connected. The xDSL modem 270 is connected to the Internet 280. Here, the modems 250 and 270 have an internal type mounted inside the present access device 200 and an external type connected with a serial cable. There is no performance difference between the two models, and it is divided into internal and external according to the intended use. For example, older notebook PCs without a PCMCIA port will not fit a modem card, so you will need to use an external modem. External is convenient when connecting multiple modems to one PC. This is why there is a difference between internal and external. Another difference between an internal modem and an external modem is whether you have an I / O controller. The external modem connects to the PC via a serial cable, eliminating the need for an I / O controller. However, internal modems have an I / O controller in the circuit itself. If the internal modem is connected to the same serial port with the I / O controller inside the PC enabled, a conflict occurs because two I / O controllers coexist. In this case, either I / O controller It should be disabled.

3 is a detailed configuration diagram of the telephone exchange unit 210 according to the present invention, the telephone exchange unit 210 of the present invention is an emergency trunk line switching unit 211, extension telephone connection unit 212, analog switch unit 213 And a trunk line telephone connection unit 214, a PCM codec unit 215, and a digital signal processing unit 216.

The emergency trunk line switching unit 211 directly connects the station and the trunk line when an alarm occurs and performs a function of switching to use the Internet as well as a phone call even when an emergency occurs. The emergency trunk line switching unit 211 includes a relay and an alarm control circuit. If the power is normal and no alarm occurs, the extension telephone line is connected to the extension telephone connection part and the path is set to the trunk line or the Internet through the analog switch unit 213 according to the command of the controller 230, and the power is turned off or the alarm When a call occurs, the station and trunk line can be directly connected through a relay to enable telephone calls and Internet use. Description of the emergency trunk line switching unit 211 will be described later in detail with reference to FIG.

The extension telephone connection unit 212 performs a function of matching an extension telephone connected to a private switchboard, and the trunk line telephone connection unit 214 performs a function of connecting an extension telephone with a PSTN network. Here, the extension telephone connection unit 212 is configured by the number of the extension telephones accommodated, and the trunk line telephone connection unit 214 is configured by the number of established trunk lines. The analog switch unit 213 is interconnected with the extension telephone connection unit 212 and the trunk line telephone connection unit 214, and between the stations, the station- trunk line, the station / trunk line- Internet according to the switching control signal of the controller 230. Performs the function of switching to specify the communication path.

The PCM codec unit 215 is interconnected with the analog switch unit 213 and performs a function of encoding an analog signal into a digital signal or conversely decoding a digital signal into an analog signal. That is, the analog signal applied from the analog switch unit 213 is encoded into a digital signal and transmitted to the digital signal processing unit 216, and the digital signal applied from the digital signal processing unit 216 is decoded into an analog signal to convert the analog switch unit ( 213). The digital signal processing unit 216 is interconnected with the PCM codec unit 215, and purifies or standardizes the level or state of the disordered digital signal applied from the PCM codec unit 215 and the control unit 216 to S of the digital signal. It improves the / N ratio and reproduces with accurate and reliable signal.

4 is a circuit diagram showing the configuration of an emergency trunk line switching unit 211 according to the present invention, the emergency trunk line switching unit 211 is composed of an alarm control circuit and a relay, the alarm control circuit is composed of an inverter and logical gate have. In the present invention, it is assumed that alarms include hardware alarms, software alarms, line alarms, QoS alarms, and power alarms. If an alarm occurs, a high signal (i.e., '1') is applied; That is, it is assumed that '0') is applied and the relay is driven at a high signal. In addition, it is assumed that the initial relay is connected to the station (that is, the station TIP and the ring line) terminal and the station telephone connection unit 212 terminal.

An inverter is connected to each alarm signal output, and each inverter is connected to an input of an AND gate. The output terminal of the AND gate is connected to the input terminal of another inverter, and its output terminal is connected to the relay. Among the alarm signals, the power alarm signal is directly connected to the relay terminal and configured to drive the relay when a power alarm occurs. The relay is connected to the power supply (+ Vcc) terminal.

If no alarm occurs, each alarm signal is output a low signal, which is inverted by the inverter to become a high signal. Since both are high signals, the AND gate outputs a high signal, which is inverted by the inverter and a low signal is applied to the relay. Since the relay does not drive when the signal is low, the relay allows the extension and extension telephone connections to be connected as initially set. Therefore, the controller 230 switches to a path desired by a general extension user (eg, a trunk line, another extension, or the Internet).

When any one of the alarm signals is generated, the corresponding alarm signal is outputted with a high signal, which is inverted by the inverter to become a high signal. Since either signal is a low signal, the AND gate outputs a low signal, which is inverted by the inverter, and a high signal is applied to the relay. Since the relay is driven when the signal is high, the relay is driven to connect the extension line and the trunk line telephone connection without maintaining the initially established connection state. Therefore, even if an emergency occurs, the controller 230 may switch to a path desired by a general extension user (eg, a trunk line, another extension, or the Internet).

FIG. 5 is a detailed configuration diagram of a part of an access device according to the present invention, in which the LAN switch unit 220, the control unit 230, the LAN network connection unit 240, and the xDSL modem unit 250 except the telephone exchange unit 211 are provided. Detailed configuration diagram.

The LAN switch unit 220 includes a LAN hub 222 and an Ethernet transceiver 224. The LAN hub 222 is a communication connection device used to connect a plurality of computers, and serves as a multi-port repeater. A repeater is a device that amplifies a signal from the input side and delivers it to the output side. This is a technique used to overcome the limitation of distance due to attenuation of the signal when transmitting data by connecting only a cable. That is, the LAN hub 222 is a device having several ports while having the function of such a repeater. The LAN hub 222 can be classified according to the type of port (AUI, BNC, TP, etc.), but nowadays, most hubs of the TP type are used. In addition, depending on the speed and support method, it is divided into various types such as 10Base-T, 100Base-Tx, 100Base-Fx, and 100VG-AnyLAN. In addition, depending on whether the Simple Network Management Protocol (SNMP) is supported, it is divided into a dummy and an intelligent hub, and there is a stackable hub that can connect several hubs to an internal bus. In addition, the LAN hub 222 checks the number of ports to determine more than the number of users, it is preferable to select a hub having more ports than the set number of ports. The Ethernet transceiver 224 is located between the LAN hub 222 and the serial port control unit 235 performs a function of transmitting and receiving to exchange data. The present invention uses a 10 / 100Base-T Ethernet transceiver capable of 10/100 automatic selection.

The control unit 230 is a telephone exchange interface unit 231 for adjusting the data format and timing for interaction with the telephone exchange unit 210, a clock generator 232 for generating a clock for applying a control command, alarm generation CPU 233, which controls to switch to a desired path (e.g., extension- trunk line, extension-extension, extension-internet, etc.) and collectively controls each component to perform IP sharing function, xDSL modem function, VoIP and VoDSL function, There is a conflict between the memory unit 234 including the ROM 234a and the RAM 234b for storing various programs and data, and the LAN switch unit 220, the LAN network connection unit 240, and the xDSL modem unit 250. It is configured to include a serial port control unit 235 for controlling so that communication does not occur.

LAN network connection unit 240 is composed of an Ethernet transceiver 242, and is located between the serial port control unit 235 and the Internet 280 performs a function of transmitting and receiving to exchange data with each other. The present invention uses a 10 / 100Base-T Ethernet transceiver capable of 10/100 automatic selection.

The xDSL modem unit 250 is a UTOPIA Interface 252 for interfacing data formats and timings to be compatible with various xDSL modems (eg, ADSL, HDSL, SDSL, VDSL, RADSL, etc.), various channels and An xDSL processor 254 that processes multi-function voices and processes various data transmitted from various xDSL modems at high speeds, and an analog front end that is digitally connected and amplifies the radio wave to an intermediate frequency. 256) and a splitter 258 for receiving a voice signal and a data signal, filtering the signal, and separating the signal into a voice signal and a data signal. The splitter 258 is connected to the telephone exchange unit 210 and the Internet 280, and the voice signal separated by the splitter 258 is transmitted to the desired path through the telephone exchange unit 210, and the data signal is transmitted to the Internet ( 280 is transmitted to the desired path.

Hereinafter, an operation relationship of the voice / data integrated multifunction access device according to the present invention will be described in more detail with reference to the accompanying drawings. The description of the operation of the present invention focuses on the functions that can be implemented by using the present invention.

The first function that can be implemented by using the present invention is that it can provide excellent call quality and uninterrupted telephone service (ie, telephone line backup function). When the extension user picks up the handset to talk to another extension user, the controller 230 detects the hook-off signal and connects the digital signal processing unit 216 to the PCM codec unit 215 and the extension telephone connection unit 212 so that the analog switch unit is connected. Control 213. At this time, the digital signal processing unit 216 sends a call enabled signal (i.e., a dial tone signal) to the caller, and when the caller dials the extension telephone number (i.e., when the DTMF signal of the corresponding station is input), the ringer answers the call. Send a signal. When the called party responds to the ring signal, the analog switch unit 213 sets up a call path between the talker and the called party according to the control signal of the controller 230 to enable mutual communication. In addition, when the extension user picks up the handset and dials an access code (for example, the number 9 key) to make a call through the CO line, the controller 230 detects the corresponding signal and connects the analog switch unit 213 to the station and the CO line. Control as possible. Thereafter, the call path is the same as the inter-extended call described above. As such, in the normal case, the station user switches according to a desired path, but when an emergency situation occurs (for example, when a hardware alarm, a software alarm, a line alarm, a QoS alarm, a power alarm, etc. occur), the controller 230 performs an emergency trunk line. By driving the relay of the switching unit 211 to control the extension directly to the trunk line, it operates to provide uninterrupted telephone service even if an emergency occurs. In addition, when the access device 200 is used as a VoIP gateway or VoDSL equipment, if an xDSL line fails or the QoS state is lower than a certain level, even if the extension subscriber wants to make a telephone call through the data network, It can communicate by changing the call setup path to enable telephone service through the general telephone network.

A second function that can be implemented by using the present invention is that one computer can share an IP address and automatically assign an IP address. In order to perform this function, the LAN network connection unit 240 or the xDSL modem unit 250 directly connects to a wide area network (WAN) network, and general LAN terminals (eg, personal computers) are connected to the LAN switch unit 220. Connect to the LAN hub 222 port. In general, the Internet subscriber line is provided with a peer-to-peer protocol (PPP) service in the form of a leased line or a dial-up so that one IP address is allocated in the public Internet network. Therefore, the present invention also connects to the Internet 280 in a dedicated line or dial-up mode according to the modem connection type, and is assigned one IP address through PPP. Here, the access device 200 operates as a DHCP client (Dynamic Host Configuration Protocol Client) and the Internet network side operates as a DHCP server. In addition, when a LAN terminal is connected to the LAN hub 222, the access device 200 operates as a DHCP server and operates as a LAN terminal DHCP client. Therefore, the access device 200 allocates an IP address to each LAN terminal, and when the LAN terminal attempts to communicate with the WAN side, a private IP address and a public IP address allocated from the WAN side. PAT (Port Address Translation) function is performed between each other to enable mutual communication. Here, the IP address assigned by the LAN terminal is called a private IP address. In addition, the access device 200 provides an IEEE 802.3 multiport hub function between LAN terminals, and the LAN terminal transmits an uplink of the LAN hub 222 to the controller 230 for communication with the WAN interval. It is connected to operate through the xDSL modem unit 250 to communicate with each other.

A third function that can be implemented by using the present invention is that the access device 200 can be utilized as VoIP / VoDSL. In order to perform this function, the telephone exchange unit 210, the control unit 230 and the LAN network connection unit 240 operates as a VoIP gateway, and the telephone exchange unit 210, the control unit 230 and the xDSL modem unit 250 Works with VoDSL VoIP is a technology that supports not only data but also voice using IP as a standard protocol in a network. The biggest advantage of VoIP is that it utilizes the existing IP network as it is and integrates telephone service, greatly reducing the line cost of telephone or fax transmission, so that telephone users can make long distance and international call service in the Internet and intranet environment with only local call charges. Will be able to receive. VoIP can manage voice and data traffic on a single device and line, which can be used for applications such as web call centers and desktop video.It can be deployed only with existing devices such as routers without additional gateways, unlike Internet phones. It may be. With the advent of VoIP, telephony and data networks have been combined into a single IP LAN, maximizing LAN utilization and improving the quality of network services. When the extension user wants a telephone service through the IP network, the controller 230 detects a corresponding signal (eg, a hook-off signal, an access code signal, a DTMF signal, etc.), and detects an IP (eg, H323) through the LAN network connection 240. , MGCP (Media Gateway Control Protocol), SIP (Session Initiation Protocol)] to set up a call. The communication path for performing the VoIP function is connected in the order of the telephone connection unit 210, the analog switch unit 213, the PCM codec unit 215, the digital signal processing unit 216, the control unit 230, and the LAN network connection unit 240. do.

The operation for VoDSL functionality is almost identical to that of VoIP and differs only in protocol and communication path. That is, unlike VoIP using IP, VoDSL uses the xDSL protocol, and the communication path is a telephone connection unit 210, an analog switch unit 213, a PCM codec unit 215, a digital signal processor 216, and a controller 230. xDSL modem unit 250 in this order. In this case, when the IP line or network failure occurs, it operates in connection with the above-described telephone line backup function. VoDSL is a next-generation voice telephone service that can dramatically reduce network construction costs by accommodating up to 24 subscribers on one telephone line. VoDSL uses DSL technology that separates copper telephone lines into voice and data bands, respectively, and allocates additional voice lines to data lines. Voice over IP (VoIP) is superior to Voice over Internet Protocol (VoIP), and a single copper phone line allows users to use multiple phones without a private switch or a key phone, thereby reducing costs for both subscribers and service providers.

As such, the access device 200 performs a telephone exchange function with the telephone exchange unit 210 and the control unit 230, and the VoIP gateway to the telephone exchange unit 210, the control unit 230 and the LAN network connection unit 240. Performs the function, performs the VoDSL function by the telephone exchange unit 210, the control unit 230 and the xDSL modem unit 250, IP to the LAN switch unit 220, the control unit 230 and the LAN network connection unit 240 It can be implemented to perform the router function, the controller 230, the LAN network connection unit 240 and the xDSL modem unit 250 to perform the xDSL modem function.

The above description is only for explaining one embodiment, and the present invention is not limited to the above-described embodiment and can be variously changed within the scope of the appended claims. For example, the shape and structure of each component specifically shown in the embodiment of the present invention may be modified.

As described above, according to the voice / data integrated multifunction access device according to the present invention, by implementing the telephone line backup function, the uninterrupted telephone exchange function, the IP sharing function, the xDSL modem function, the VoIP / VoDSL function, etc. Therefore, it is effective to provide various services at low cost.

Claims (4)

A voice / data integrated access device for providing telephone service and network service by separating voice and data signals in one telephone line, A telephone exchange unit that encodes or decodes an analog signal input from the outside, and switches to directly connect an extension line to the trunk line when an emergency occurs; A LAN switch unit connected to a plurality of computers and switching so that all computers connected to the switch can exchange data; It is connected to the telephone exchange unit and the LAN switch unit, and interfaces various signals applied from the telephone exchange unit, receives the data signal applied from the LAN switch unit and controls to switch to the desired path, each component A control unit for transmitting a control command signal for controlling a function; A LAN network connection unit located between the controller and the external xDSL modem and relaying transmission / reception data between the controller and the external xDSL modem; And And an xDSL modem unit connected to the telephone exchange unit and the control unit and configured to transmit / transmit the inputted data to the corresponding path by modulating / demodulating the input data. According to claim 1, wherein the telephone exchange unit Emergency trunk line switching unit for directly connecting the station and the trunk line when the alarm occurs to switch to use a telephone call or the Internet when an emergency occurs; An extension telephone connection for connecting an extension telephone; A trunk line telephone connection for connecting to a trunk line telephone; An analog switch unit interconnected with the extension telephone connection unit and the trunk line telephone connection unit, and configured to switch to designate a communication path between stations, trunk lines, trunk lines and trunk lines / internet according to a switching control signal of the controller; A PCM codec unit interconnected with the analog switch unit and encoding an analog signal into a digital signal or conversely decoding a digital signal into an analog signal; And And a digital signal processing unit connected to the PCM codec unit and the control unit, and reproducing or standardizing the level or state of the digital signal applied from the PCM codec unit and the control unit to reproduce the original signal level. Voice / data integrated multifunction access device. The method of claim 1, The LAN switch unit is composed of an Ethernet transceiver for transmitting and receiving data to exchange data with a LAN hub which is a communication connection device used to connect a plurality of computers, The LAN network connection unit is composed of an Ethernet transceiver for transmitting and receiving data interchangeably, The Ethernet transceiver is a voice / data integrated multifunction access device, characterized in that 10 / 100Base-T Ethernet transceiver capable of 10/100 automatic selection. The voice / data integrated type of claim 2, wherein the emergency trunk line switching unit includes an inverter and an AND gate relay, and when one alarm signal is generated, the emergency trunk line switching unit switches the station to connect the station to the trunk line when one alarm signal is generated. Multifunction Access Device.