KR200283051Y1 - Internetphone small gateway for long distance subscriber by VoIP(voice over internet protocol) - Google Patents

Abstract

The present invention relates to a connection device for making an Internet phone call through an internet communication network with a general telephone,

More specifically,

After connecting one side of the device to the Internet and the other side of the device to the general telephones of a number of internal subscribers who wish to use the Internet telephone,

It converts the digital voice signal received from the external user through the internet communication network into the analog voice signal and transmits it to the general subscriber's general telephone, and converts the analog voice signal from the internal subscriber into the digital voice signal. Converts the data and transmits it to an external user through an Internet communication network.

The present invention relates to a "Internet telephony small gateway device using VIP technology for remote subscribers", which allows a remote internal subscriber using a general telephone to freely make a telephone call through an internet communication network without installing additional equipment.

Description

Internet phone small gateway for long distance subscriber by voice over internet protocol (VoIP)}

The present invention relates to a connection device for making an Internet phone call through an internet communication network with a general telephone,

More specifically,

After connecting one side of the device to the Internet and the other side of the device to the general telephones of a number of internal subscribers who wish to use the Internet telephone,

It converts the digital voice signal received from the external user through the internet communication network into the analog voice signal and transmits it to the general subscriber's general telephone, and converts the analog voice signal from the internal subscriber into the digital voice signal. Converts the data and transmits it to an external user through an Internet communication network.

The present invention relates to a "Internet telephony small gateway device using VIP technology for remote subscribers", which allows a remote internal subscriber using a general telephone to freely make a telephone call through an internet communication network without installing additional equipment.

In general, the Internet telephone system refers to performing various services that enable subscribers to communicate with each other through the Internet.

In order to enable such Internet telephony, the voice signal of the sender, which is an analog signal form, is converted into a digital data signal and then transmitted to the receiver through an internet service network, and the receiver can receive the analog data that can be recognized by a human. It is necessary to reconvert the signal, i.

Internet telephones, which are currently implemented, replace the above-mentioned signal conversion by computers. That is, after a PC (personal computer) is connected to the Internet, signal conversion is performed using a voice signal conversion device (for example, a sound card, etc.) built in the PC, and the converted voice signal is converted using a general telephone. By allowing input and output, Internet telephony becomes possible.

However, as shown in FIG. 1, the above-described Internet telephony system has a restriction that both parties wishing to use the Internet telephony service must have a PC connected to the Internet service network. Even if both parties have a PC connected to the Internet, there is a problem in that unnecessary power consumption is required because the PC connected to the Internet must be kept ON all the time in order to be able to make a call without disconnection.

In addition, general subscribers who are not familiar with computer use cannot use it because of lack of computer operation ability even if they are willing to use internet phone or overcome various obstacles in communication due to immature use of computer. Rather, it was often uncomfortable.

That is, in the conventional method as described above, the user must install an expensive PC, and must connect it to a communication network, and to enable the use of the Internet phone with the economic burden that the PC must be always on. There was a tendency to evade its use because of the technical burden of maneuverability.

In order to supplement the problems of the prior art as described above, a method has been devised for a subscriber to use an internet phone service by installing a converter (signal converter, Convertor) on the phone itself.

However, the call method using the converter as described above has the advantage of using the Internet phone service by directly connecting the telephone to the Internet without using a PC. However, when communicating with a separate converter as shown in FIG. Since each must have a single converter, the cost of equipment for Internet telephony service has increased rapidly. In the case of a centralized converter as shown in FIG. 2B, the service distance is the maximum when considering the signal attenuation caused on the communication line to the subscriber. There was a problem that can not exceed 500m. That is, since only the subscribers in the short distance can be used, there is a problem that the service is not available to the subscribers far from the device.

The present invention was devised to solve the above problems.

Between the internet communication network and the subscriber, there is a small internet communication device using VIO IP technology.

It converts the digital voice signal received from the external user through the internet communication network into the analog voice signal and transmits it to the general subscriber's general telephone, and converts the analog voice signal from the internal subscriber into the digital voice signal. Converts the data and transmits it to an external user through an Internet communication network.

Its purpose is to allow the internal subscribers of remote telephones to make phone calls through the internet without any additional equipment.

It also aims to extend the service distance up to 1000m by allowing all subscribers in high demand areas such as large buildings or apartment complexes to be accommodated.

In addition, a third object is to reduce the installation cost of equipment of a service user by allowing a plurality of users to jointly purchase a device and then share and use the device.

1 is a block diagram of the Internet phone using a conventional PC

Figure 2a is a block diagram of the Internet phone using a conventional individual converter

Figure 2b is a block diagram of the Internet phone utilizing a conventional centralized converter

3 is a block diagram of a small Internet telephone gateway device using the VIO IP technology of the present application

4 is a block diagram of the Internet phone using the small Internet telephone gateway device of the present application

5 shows H.323 VoIP Gateway Call API Flows

<Explanation of symbols on main parts of the drawings>

10: subscriber call 11: remote party

20: interface unit 21: terminal network

22: loop detector 23: hook detector

31: signal conversion unit 22: voice signal conversion unit

40: main control unit 50: network interface unit

60: storage unit 61: DRAM controlqn buffer

62: flash memory 63: DRAM

64: RAM 80: Internet

90: power supply 91: transformer

92: rectifier 93: battery

The constitution of the present invention for achieving the above object,

It is connected to the general telephone 10 of each subscriber side, and receives power from the power supply unit 90 to supply the power necessary for the operation of the device. A subscriber line interface (SLIC) 20 for performing the above;

Converts a voice signal received in the analog state from the subscriber's phone into a digital signal and transmits it to an audio signal converter, or converts a digital signal received from the voice signal converter into an analog signal and sends it to the subscriber's phone. A signal conversion unit (AD / DA CODEC) 31 having a function of performing a function;

The digital voice data (PCM data) received from the signal converter is compressed using an algorithm according to the G 723.1 and G 729A protocols to be packetized and transmitted to the outside, and conversely, packet data of the G 723.1 and G 729A received from the outside is received. An audio CODEC 32 having a function of restoring the PCM data;

By performing the H.323 VOIP Gateway flow according to FIG. 2 as a core processor of the device, the voice signal converter transmits the packetized data to the outside or transmits the packet data received from the outside to the voice signal converter. A main control part (i386EX) 40;

A network interface unit (MAC) 50 for providing an interface for transmitting and receiving data to and from an Internet service network;

A storage device 60 for storing a program for driving the device and for storing necessary information during use (transmission and reception of data) of the device;

A power supply unit (POWER) 90 which receives commercial power from the outside and transforms and rectifies the power into power required to operate the device and supplies the components to each component; Characterized in that made.

The subscriber interface unit 20 further includes a hook detector 23 for monitoring a subscriber's telephone state (whether a hook switch is open); A terminal network 21 for connecting a telephone to each subscriber; A loop monitoring unit 22 that is responsible for transmitting signals transmitted to and received from each subscriber's telephone; Characterized in that made.

The storage unit 60 includes: a DRAM controller buffer (61) for controlling various storage operations for temporarily storing the converted voice signal and updating it; A flash memory 62 for storing input / output data and controlling the same; A DRAM 63 for storing and updating all data transmitted and received; RAM 64 for storing a program for voice signal conversion; Characterized in that made.

The power supply unit 90 further includes a transformer 91 for reducing the commercial power supplied from the outside to voltages 48V and 5V necessary for the device; A rectifier 92 converting the reduced voltage into a DC power source for signal processing; Ebi power unit (Battery, 93) for supplying power in an emergency is characterized in that it is configured.

Referring to Figures 1 to 2 the operation process of the present application configured as described above is as follows.

The operation of the present application may be described by dividing the subscriber 10 when the other party and the remote party 11 calls the subscriber.

First, if the subscriber calls the other party,

Usually, the interface unit (SLIC) 20 of the device is supplied with -48V of the power supplied to the power supply unit 90 to the subscriber's telephone. At this time, when the subscriber picks up the handset to use the telephone, the hook detector 23 detects the state and informs the main control unit i386EX 40 that the subscriber intends to use the telephone 10. At the same time, the loop detector 22 of the interface 20 (SLIC) 20 operates to supply 5V, 25mA (up to 30mA) of power required to drive the system.

The main controller 40 generates a call progress tone (CPT, dialtone, ringback tone, etc.) through the voice signal conversion unit 32 according to the operation of the hook detector 23 to inform the subscriber of the state of the line.

At this time, if there is no abnormality in the telephone line, the voice signal converter 32 generates a dial tone, and the subscriber listens to the dial tone transmitted from the voice signal converter and calls a counterpart by pressing a button of the telephone.

The main control unit recognizes the DTMF tone through the voice signal converter, recognizes the other party's telephone number or identification number, and then calls the other party according to the call procedure of the H.323 protocol.

API flows according to the call procedure of the H.323 protocol are shown in FIG. Since the flow shows a general procedure and is already known, a detailed description will not be made herein.

After the call is over, the subscriber releases the handset, and the hook detector 23 detects the state of the handset dropping and informs the master controller 40 of the result, which is necessary for the loop monitor 22 of the interface unit 20 to operate. Only the minimum current of 5mA is supplied to the system and the system returns to normal monitoring.

Next, explain the case where the remote party calls the subscriber.

Normally, the interface unit (SLIC) 20 of the device is supplied with -48V power supplied from the power supply unit 90, and the interface unit 20 supplies this to the subscriber's telephone 10. At this time, when a call is received from the remote party according to the H.323 call procedure, the main control unit rings a ring signal to the subscriber's telephone to be called through the interface unit 20 according to the call procedure of H.323.

Then, when the subscriber hears the ring signal and lifts the handset of the telephone, the hook detector 23 informs the main controller 40 of the state of the hook switch, and then blocks the ring signal. Subsequently, the interface unit 20 supplies 25 mA of power to the loop monitor 22 to operate the loop monitor 22. In this state, the state of the hook switch of the telephone is monitored until the end of the call. When the subscriber releases the handset, the hook detector 23 recognizes that the handset is lowered and informs the master controller 40 of the result. The loop monitoring section 22 of the section 20 returns to the normal monitoring state while supplying the system with only the minimum current of 5 mA required for operation.

Figure 4 shows the state utilized by combining the gateway device on the Internet, it can be seen that the analog signal output from the gateway device is transmitted extending up to a maximum of 1KM.

As described above, the present invention,

It has the effect of allowing the internal subscribers of the long distance using the general telephone to freely make calls through the internet communication network without installing any additional equipment.

It also has the effect of extending the service distance up to 1000m to accommodate all the subscribers in the high demand areas such as large buildings or apartment complexes.

In addition, by allowing a large number of users to share the central control unit has the effect of significantly reducing the equipment installation cost of the service user.

Claims (3)

It is connected to the general telephone 10 of each subscriber side, and receives power from the power supply unit 90 to supply the power necessary for the operation of the device. A subscriber line interface (SLIC) 20 for performing the above; Converts a voice signal received in the analog state from the subscriber's phone into a digital signal and transmits it to an audio signal converter, or converts a digital signal received from the voice signal converter into an analog signal and sends it to the subscriber's phone. A signal conversion unit (AD / DA CODEC) 31 having a function of performing a function; The digital voice data (PCM data) received from the signal converter is compressed using an algorithm according to the G 723.1 and G 729A protocols to be packetized and transmitted to the outside, and conversely, packet data of the G 723.1 and G 729A received from the outside is received. An audio CODEC 32 having a function of restoring the PCM data; By performing the H.323 VOIP Gateway flow according to FIG. 2 as a core processor of the device, the voice signal converter transmits the packetized data to the outside or transmits the packet data received from the outside to the voice signal converter. A main control part (i386EX) 40; A network interface unit (MAC) 50 for providing an interface for transmitting and receiving data to and from an Internet service network; A storage device 60 for storing a program for driving the device and for storing necessary information during use (transmission and reception of data) of the device; A power supply unit (POWER) 90 which receives commercial power from the outside and transforms and rectifies the power into power required to operate the device and supplies the components to each component; Small internet phone gateway using VIP technology for remote subscribers The method of claim 1, The subscriber interface unit 20 further includes a hook detector 23 for monitoring a subscriber's telephone state (whether a hook switch is open); A terminal network 21 for connecting a telephone to each subscriber; A loop monitoring unit 22 that is responsible for transmitting signals transmitted to and received from each subscriber's telephone; Small internet phone gateway using VIP technology for remote subscribers The method of claim 1, The power supply unit 90 further includes a transformer 91 for reducing the commercial power supplied from the outside to voltages 48V and 5V necessary for the device; A rectifier 92 converting the reduced voltage into a DC power source for signal processing; Small internet telephone gateway device using VIP technology for long-distance subscribers, consisting of an emergency power supply unit (Battery, 93) for supplying power in an emergency