KR100404090B1 - Embedded voice over internet protocol apparatus and method for home gateway - Google Patents

Abstract

The present invention relates to an apparatus and method for implementing a BOOIP of a home gateway, and more particularly, to implement a telephone interface in a home gateway so that a user can make a call with a counterpart by accessing a public telephone network and an IP network through the home gateway. To this end, the present invention provides a subscriber circuit (SLIC) which is a telephone interface; A DTMF receiver for converting a dual tone multi frequency (DTMF) output from the subscriber circuit into digital data and outputting the digital data; An audio codec for coding the voice signal output from the subscriber circuit into digital voice data and decoding and outputting the digital voice data received from CPU to an analog voice signal; A relay for connecting or disconnecting the telephone to a public telephone network (PSTN) according to a user's first button output from the DTMF receiver; A CPI controlling the relay according to an output signal of a DTMF receiver and coding and outputting the output signal of the audio codec according to voice compression and H.323 protocol; It is characterized by consisting of the Ethernet device that connects the CPI and IP (IP) network. Therefore, the present invention implements the VoIP gateway at low cost because it fully utilizes the resources of the home gateway, and if necessary, records information such as contents of calls, time, and the like, and connects a public telephone network directly to a public telephone network by controlling a relay. This reduces the load on CFI.

Description

Device and method for implementing BIOIP in home gateway {EMBEDDED VOICE OVER INTERNET PROTOCOL APPARATUS AND METHOD FOR HOME GATEWAY}

The present invention relates to an apparatus and method for implementing a home gateway of a home gateway, and more particularly, to an apparatus and a method for implementing a home gateway of a home gateway for allowing a general telephone to access a public telephone network and an IP network through a home gateway.

In general, BOOIP (VoIP: Voice over Internet Protocol) is a communication method that delivers a packet containing voice data through the Internet, which enables users to save phone charges and provide various additional services. Have

For these reasons, despite the call quality issues, companies are trying to replace their internal exchanges with VoIP gateways.

In addition, at home, users use IP (Internet Protocol) phones to make overseas calls at low rates.

Accordingly, an object of the present invention is to provide a device and method for implementing a home gateway of a home gateway, which allows a VoIP function to be used as a general telephone by embedding a VoIP function in a home gateway. have.

In addition, a home gateway is connected to an external communication network by Ethernet, and thus has an object of providing a device and method for implementing a home gateway of the home gateway, in which resources are saved.

1 is an exemplary view showing a configuration for a BIO IP implementation apparatus of the present invention home gateway.

Figure 2 is a flow chart illustrating the operation flow of the BUI IP implementation method of the home gateway of the present invention.

FIG. 3 is an exemplary diagram illustrating a process of matching input impedance of a subscriber circuit in FIG. 1. FIG.

** Explanation of symbols for main parts of drawings **

1: telephone 2: RJ-11

3: subscriber circuit (SLIC) 4: DTMF receiver

5: CPI 6: Relay

7: RJ-11 8: Public Telephone Network

9: audio codec 10: ethernet device

11: RJ-45 12: IP network

The present invention for achieving the above object, the subscriber circuit (SLIC) which is a telephone interface; A DTMF receiver for converting a dual tone multi frequency (DTMF) output from the subscriber circuit into digital data and outputting the digital data; An audio codec for coding the voice signal output from the subscriber circuit into digital voice data and decoding and outputting the digital voice data received from CPU to an analog voice signal; A relay for connecting or disconnecting the telephone to a public telephone network (PSTN) according to a user's first button output from the DTMF receiver; A CPI controlling the relay according to an output signal of a DTMF receiver and coding and outputting the output signal of the audio codec according to voice compression and H.323 protocol; Characterized in that composed of the Ethernet device that connects the CPI and IP (IP) network.

In addition, the first step of determining whether the user presses the button of the phone or the call is received and waiting for transmission and reception of the call; Determining whether the button is a specific button when the user presses the first button and connecting the telephone to the public telephone network if the button is not the specific button; If the button pressed by the user is a specific button, turning off a relay connecting a telephone and a public telephone network and converting a number input after the specific button into an IP address; A fourth step of connecting the phone to the phone corresponding to the IP address according to the H.323 protocol after executing the third step; Determining whether the call is a call received from a public telephone network or an IP network when the call is received in the first step, and connecting the telephone to the public telephone network when the call is received from the public telephone network; If the received call is a call received from the IP network, it operates in a sixth step of ringing a telephone ring by recognizing the IP address and connecting the IP network to the telephone.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing a configuration of a BIOIP implementation apparatus of a home gateway according to the present invention, and as shown therein, a subscriber circuit (SLIC) 3 which is a telephone interface 1; A DTMF receiver 4 for converting and outputting a dual tone multi frequency (DTMF), which is output from the subscriber circuit 3, into digital data; An audio codec (Codec) which codes the voice signal output from the subscriber circuit 3 into digital voice data and decodes the digital voice data received from the CPU (CPU) 5 into an analog voice signal and outputs the analog voice signal. and Decoder) (9); A relay (6) for connecting or disconnecting the telephone (1) to the public telephone network (8) in accordance with the user's first button output from the DTMF receiver (4); A CPI (5) for controlling the relay (6) according to the output signal of the DTMF receiver (4) and for coding the output signal of the audio codec (9) according to voice compression and H.323 protocol; It is composed of an Ethernet device 10 connecting the CPU 5 and the IP network 12.

In addition, FIG. 2 is a flowchart illustrating a method of implementing a home IP of the home gateway of the present invention. As shown in FIG. 2, a first step of waiting for transmission and reception of a call is determined by determining whether a user presses a button of a telephone or a call is received. S1 to S3); A second step (S4, S5) of determining whether the button is a specific button when the user presses the first button and connecting the telephone to the public telephone network if the button is not the specific button; A third step (S6, S7) of turning off the relay connecting the telephone and the public telephone network if the button pressed by the user is a specific button and converting a number inputted after the specific button into an IP address; A fourth step (S8) of connecting the phone to the phone corresponding to the IP address according to the H.323 protocol after executing the third step (S6, S7); When the call is received in the first step (S1 ~ S3), it is determined whether the call is a call received from a public telephone network or an IP network, and when the call is received from the public telephone network, a fifth step (S9 to S11) of connecting the telephone to the public telephone network. Wow; When the received call is a call received from an IP network, an embodiment of the present invention will be described as consisting of six steps (S12 and S13) of recognizing an IP address and ringing a telephone ring and connecting an IP network and a telephone.

The home gateway is a device for integrating a network device. The home gateway is already equipped with the CPI 5 and the Ethernet device 10, so that the subscriber circuit 3, the DTMF receiver 4, and the audio codec 9 are integrated to integrate the telephone 1. And an additional relay (6).

First, the user connects the front end of the RJ-11 of the telephone 1 to the jack end 2 of the RJ-11, which is the telephone connection terminal of the home gateway, and also connects the public telephone network 8 to the home gateway.

In addition, the user connects the front end of the RJ-45, the connection terminal of the IP network provided by the communication provider to the jack end 11 of the RJ-45, the connection terminal of the Ethernet device 10 in the home gateway.

After that, if the user wants to talk with the other party through the public telephone network 8, the user may make a phone call in the same way as a general telephone.

The home gateway initially turns on the relay 6 so that the telephone 1 and the public telephone network 8 are connected so that the user can make a phone call in the same way as a normal telephone.

In another case, if the user wants to talk to the other party through the IP 12 network, the user presses a specific button of the telephone 1 and then presses the other party's telephone number.

At this time, the home gateway detects a specific button pressed by the user, turns off the relay 6, disconnects the telephone 1 from the public telephone network 8, and converts the telephone number of the counterpart entered by the user into an IP address. Perform.

The detection of this specific button is performed by determining whether the digital data output from the DTMF receiver 4 is #, * corresponding to the specific button of the telephone 1.

Thereafter, the home gateway connects the user and the other party, codes the user's voice signal through the audio codec 9, constructs a packet according to the H.323 protocol, and transmits the packet to the IP network through the Ethernet device 10.

In addition, if necessary, the home gateway may provide a convenience to the user by recording the talk content and the talk time in a memory.

The method of making a call using the home gateway has been described above, and the method of receiving a call using the home gateway is as follows.

Since the initial state of the home gateway is a state in which the relay 6 is turned on and the telephone 1 and the public telephone network 8 are connected, the call received from the public telephone network 8 is directly connected to the telephone 1.

In other cases, if a call is received from IP network 12, the home gateway rings through telephone subscriber circuit 3 and waits until the user picks up the handset.

When the user picks up the receiver, the home gateway connects the user and the called party through the IP network 12 so that the call is made.

FIG. 3 is an exemplary diagram illustrating the point to be noted when matching the input impedance of the subscriber circuit in the home gateway. As shown in FIG. 3 (a), the general telephone 1 and the switch 8A are illustrated. Assuming that the impedance between Zp is connected to the subscriber circuit 3 in parallel as shown in Fig. 3 (b), the sum of the input impedance of the telephone set 1 and the input impedance of the subscriber circuit 3 (Zp || Zg). ) May be inconsistent with the input impedance of the switch 8A, so the impedance of the subscriber circuit 3 should be adjusted to match the impedance.

In addition, when the line impedance is large, the signal attenuation becomes large.

As described above in detail, since the present invention fully utilizes the resources of the home gateway, it is effective to implement a VoIP gateway at a low cost and to record information such as call contents and time when necessary.

In addition, since a call connected to a public telephone network is directly connected to a public telephone network by controlling a relay, there is an effect of reducing the load on CPI.

Claims (4)

Subscriber circuit (SLIC) which is a telephone interface; A DTMF receiver for converting a dual tone multi frequency (DTMF) output from the subscriber circuit into digital data and outputting the digital data; An audio codec for coding the voice signal output from the subscriber circuit into digital voice data and decoding and outputting the digital voice data received from CPU to an analog voice signal; A relay for connecting or disconnecting the telephone to a public telephone network (PSTN) according to a user's first button output from the DTMF receiver; A CPI controlling the relay according to an output signal of a DTMF receiver and coding and outputting the output signal of the audio codec according to a voice compression and a predetermined communication protocol; VioIP implementation device of the home gateway, characterized in that the Ethernet device for connecting the CIP and IP (IP) network. The apparatus of claim 1, wherein the input impedance of the subscriber circuit is configured to match the input impedance of the telephone and the input impedance of the public telephone network. Determining whether the user presses a button of the telephone or receives a call and waits for transmission and reception of the call; Determining whether the button is a specific button when the user presses the first button and connecting the telephone to the public telephone network if the button is not the specific button; If the button pressed by the user is a specific button, turning off a relay connecting a telephone and a public telephone network and converting a number input after the specific button into an IP address; A fourth step of connecting the phone to the phone corresponding to the IP address according to a predetermined communication protocol after executing the third step; Determining whether the call is a call received from a public telephone network or an IP network when the call is received in the first step, and connecting the telephone to the public telephone network when the call is received from the public telephone network; If the received call is a call received from the IP network, BOOIP implementation method of the home gateway, characterized in that consisting of a sixth step of recognizing the IP address, ringing the telephone ring and connecting the IP network and the telephone. The apparatus of claim 1 or 3, wherein the predetermined communication protocol is an H.323 protocol.