KR100272573B1 - Apparatus for exchange of telephone - Google Patents

Abstract

The present invention relates to a telephone exchange system that accommodates a general telephone terminal and an internet telephone terminal at the same time to enable mutual communication by rapid call processing.

As described above, the present invention is connected to a general telephone terminal, a plurality of general telephone terminal access means for converting a voice signal input from the general telephone terminal into PCM data through a PCM codec, and a switch for exchanging communication lines between subscribers who want to communicate with each other. Way; Data conversion means for compressing or restoring pulse code modulation (PCM) data used in a general telephone terminal and packet data used in an internet telephone terminal, and converting the voice packet data into an Internet protocol. Internet phone terminal access means for converting the data into an Internet phone terminal and vice versa, and controlling the respective systems, and storing an address conversion table for call setup between the general phone terminal and the Internet phone terminal. , Which is composed of main control means for controlling the conversion function of telephone number and internet protocol address, which enables communication between Internet phone terminal and general phone terminal, thus accommodating both existing phone service users and Internet service users. Get the effect to provide There.

Description

Telephone exchange system {Apparatus for exchange of telephone}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a telephone exchange system, and more particularly, to a telephone exchange system that accommodates a general telephone terminal and an internet telephone terminal at the same time and enables communication with each other by rapid call processing.

In general, a conventional telephone exchange system is connected to a general telephone exchange by interworking two switching systems by connecting the general telephone exchange 10 and the Internet gateway system 20 separately configured as shown in FIG. It is configured to enable communication between a plurality of general telephone terminals and a plurality of Internet telephone terminals connected to the Internet gateway system. Reference numerals 30 and 30 'are Internet phone terminals.

In this configuration, when the general telephone subscriber first calls the Internet telephone subscriber, when the general telephone subscriber first dials the Internet network access number, the general telephone exchange 10 analyzes this and sends a call to the Internet gateway system 20. do. At this time, the connection protocol of the predetermined public line switched telephone network (PSTN) is used between the general telephone exchange 10 and the Internet gateway system 20. After receiving the call, the gateway answers the call and sends out a voice guidance message. When the subscriber hears the voice prompt message and inputs the Internet subscriber number (IP address), the Internet gateway system 20 converts the Internet subscriber number into an Internet telephone protocol and calls the corresponding Internet subscriber. At this time, the Internet subscriber must be running a program to use the Internet telephone. The Internet subscriber terminal 30 of the Internet subscriber notifies the subscriber that the call has been received, and when the subscriber answers, the call is established and a mutual call can be made.

Next, when the Internet subscriber calls the landline subscriber, when the Internet subscriber calls the landline subscriber through the user interface of the Internet telephone terminal 30 (30 '), this information is transferred to the Internet gateway system through the Internet telephony protocol. 20 is passed. The Internet gateway system translates this information into a PSTN connection protocol and transmits the information to the general telephone exchange 10. The general telephone exchange 10 analyzes the translated information by the Internet gateway system and calls the general telephone subscriber corresponding to the information, and the subscriber answers the call, thereby making a mutual call between the internet subscriber and the general telephone subscriber. It becomes possible.

However, in the case of the conventional configuration as described above, the call setup process for achieving mutual communication between the general telephone terminal and the Internet telephone terminal is complicated, and it is also uneconomical because the general telephone exchange and the Internet gateway system must be separately provided. There is a problem that call processing is delayed as the systems interoperate.

The present invention has been made to solve the above problems, and the present invention is to provide a telephone exchange system that accommodates both a general telephone terminal and the Internet telephone terminal to facilitate a call between the two terminals.

In order to achieve the above object, in an embodiment of the present invention, in a call processing system for a general telephone terminal and an Internet telephone terminal, a voice signal input from the general telephone terminal connected to the general telephone terminal is converted into digital data. A plurality of general telephone terminal connection means; Switch means for exchanging communication lines between subscribers; Data conversion means for compressing or restoring voice digital data applied from the switch means and data in the form of packets used in an Internet telephone terminal; Provided is a telephone exchange system including an Internet telephone terminal access means connected to an Internet telephone terminal and converting the voice packet data into an Internet protocol to transmit to the Internet telephone terminal or vice versa.

In another embodiment of the present invention, a main control means for controlling each system and storing an address conversion table for call setup between a general telephone terminal and an internet telephone terminal, and controlling a translation function of a telephone number and an Internet protocol address. It provides a telephone exchange system characterized in that it further comprises.

In each of the embodiments of the present invention, the data converting means includes: PCM highway access means connected to the switch means for executing an interface with the PCM highway on the general telephone terminal side; Voice compression / restoration means for compressing voice PCM data used in a general telephone terminal into voice packet data used in an internet telephone terminal or restoring voice packet data used in an internet telephone terminal to voice PCM data used in a general telephone terminal ; High-level data link control (HDLC) inputted by the Internet telephone terminal access means by converting the voice packet data compressed by the voice compression / restore means into a high level data link control (HDLC) frame and transferring it to the Internet telephone terminal access means. HDLC processing means for decomposing a frame and delivering it to the voice compression / restore means; And data conversion control means for controlling each component of the PCM highway access means, the voice compression / restore means, and the HDLC processing means according to a command issued from the main control means.

Further, in each embodiment of the present invention, the Internet telephone terminal access means includes HDLC processing means for receiving or transferring the compressed voice packet data from the HDLC processing means of the data converting means; Internet protocol control means for converting the voice packet data into an internet protocol; It may include an Ethernet LAN connection means for transferring the data converted by the Internet protocol to the Internet.

1 is a block diagram of a conventional telephone switchboard

Figure 2 is a block diagram of a telephone exchange system according to an embodiment of the present invention

3 is a detailed configuration diagram of the data converter of FIG. 2.

4 is a detailed configuration diagram of the Internet phone terminal connection unit of FIG.

5 is an address translation table provided in the main controller of FIG.

6 is a software structural diagram of a protocol used in the present invention.

Explanation of symbols for main parts of the drawings

10: general telephone exchange 12: switch unit

13, 200: vocoder section 13-1: PCM high speed bus connection section

13-4, 14-1: HDLC processing unit 14, 500: Internet telephone terminal connection unit

14-3: Ethernet connection 15: Main control part

20: Internet gateway system 30, 30 ', 300: Internet telephone terminal

40, 40 ': general telephone terminal 100: call processing / protocol conversion unit

400: general telephone terminal connection

Hereinafter, a telephone exchange system according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a block diagram showing the configuration of a telephone exchange system according to an embodiment of the present invention, as shown in the present invention is connected to each general telephone terminal and the voice signal input from the general telephone terminal PCM codec ( For example, a plurality of general telephone terminal connection units 40 and 40 'converting PCM data through G.711 standardization standard), a switch unit 12 for exchanging communication lines between subscribers who want to communicate, and general Data conversion unit for converting PCM data used in the phone terminal into packet data using a voice compression / restoration method (for example, G.723.1 or G.729 standardization standard) used on the Internet, or vice versa (13) Internet telephone terminal connected to the Internet telephone terminal and converting the voice packet data into the Internet protocol to transmit to the Internet telephone terminal or vice versa. The main control unit 15 controls the system 14 and stores the address conversion table for setting up a call between the general telephone terminal and the Internet telephone terminal, and controls the conversion function of the telephone number and the Internet protocol address. Consists of

In the drawings, the general telephone terminal, the general telephone terminal connection unit 40 (40 '), and the switch unit 12 are the same as the conventional general telephone terminal system, and thus the description thereof will be omitted. However, the data converter 13, the Internet phone terminal connection unit 14, the main control unit 15, and the protocol, which are the main features of the present invention, will be described.

The data converter 13 may be composed of, for example, a vocoder, which is connected to the switch unit 12 and interfaces with the PCM highway 13 as shown in FIG. 3. -1) and a voice compression / restoration unit 13-2 for compressing and converting PCM data used in a general telephone terminal into packet data used in an internet telephone terminal, or vice versa. And an HDLC processing unit for assembling the signal compressed by the voice compression / restoring unit 13-2 into a high level data link control frame and transferring the signal to an internet telephone terminal connection unit or vice versa. (13-4) and a data conversion control unit 13-3 for controlling each component of the voice compression / restoration unit described above.

As shown in FIG. 4, the Internet phone terminal connection unit 14 includes an HDLC processor 14-1 for transmitting and receiving packet data with the HDLC processor 13-4 of the data converter, and the received HDLC processor. An Internet Protocol control unit 14-2 for converting packet data into an Internet protocol, and an Ethernet LAN connection unit 14-3 for transferring the converted Internet protocol address to the Internet.

FIG. 5 illustrates an example of an address conversion table that may be provided in a main control unit for address conversion between a general telephone and an internet telephone. The called party number and the terminal type of the called party are called, and the called party is called. If the subscriber's terminal type is an Internet phone terminal, the corresponding Internet Protocol (IP) addresses are stored in a table form, and the telephone numbers and Internet protocol addresses can be appropriately mapped with reference to this table. .

The software architecture of the protocol used in the present invention is shown in Figure 6, a general processing protocol for dual tone multi-frequency (DTMF) / ring signal conversion and voice PCM signal conversion (e.g. G.711). Phone terminal connection 40, TCP / IP over LAN interface, standardized protocols for call control (eg H.245, H.225) and standardized protocols for voice conversion (eg G .723.1, G.729) and an address translation table between the Internet phone terminal connection 14 which handles the Internet protocols (RTP / RTCP), and between the general phone terminal connection 40 and the Internet phone terminal connection 14 The call processing / protocol conversion unit may be configured in the main control unit 15 to execute protocol conversion and number translation to enable mutual communication.

When described in detail with respect to the operation and effect of the present invention made of each step as follows.

First, in the case of calling from an ordinary telephone terminal to an Internet telephone terminal, the Internet telephone switching system of the present invention operates as follows.

First, when a general telephone terminal user attempts to make a call by holding the handset of the terminal, the general telephone terminal connection unit 40 detects whether the user attempts to call and reports it to the main control unit 15. The main control section then controls the switch section 15 so that the dial tone is heard by the user.

When the user hears the dial tone and dials the telephone number of the Internet telephone terminal, a signal corresponding to the telephone number is detected through the DTMF processing unit (not shown) of the general telephone terminal connection unit 40 and reported to the main control unit 15. do. At this time, the main control unit 15 analyzes the telephone number dialed by the user and determines whether the telephone number is the telephone number of the Internet telephone terminal 30. This criterion is made by comparing the address translation table as shown in FIG.

If it is confirmed by the main control unit 15 that the telephone number dialed by the user is an Internet phone number, the main control unit 15 calls the Internet telephone terminal through a protocol conversion process as shown in FIG.

The Internet phone terminal 30 called by the main control unit notifies the user that a call signal has been generated through the user interface unit. When the user answers by this call signal, a call is set up between the Internet telephone terminal 30 and the general telephone terminal.

Next, when a call is established between the Internet telephone terminal 30 and the general telephone terminal, the telephone terminal connection unit 40 is switched by the switch unit 12 and the Internet telephone terminal connection unit 14 by the data conversion unit 13 (vocoder). Leads to. At this time, the voice signal input from the general telephone terminal is converted into PCM data through the PCM codec (G.711) in the general telephone terminal connection unit 40, and then the voice compression / restoration unit through the PCM highway connection unit 13-1 ( 13-2 (vocoder), which is converted into more compressed PCM data by the PCM codec of the protocol structure (protocol 14) shown in FIG.

The voice compression / recovery unit 13-2 generates voice packet data by converting the PCM signal into a voice compression method used on the Internet, where the generated voice packet data is the HDLC processing unit of the data conversion unit ( 13-4) to the Internet telephone terminal connection 14. At this time, the voice compression method may use G723.1 or G729.

The Internet phone terminal connection unit 14 transmits the voice packet data compressed by the voice compression method to the Internet phone terminal 30 using the Internet protocol (RTP / RTCP). The Internet phone terminal 30 converts the voice packet data transmitted from the Internet phone terminal connection unit 40 into a voice signal through a predetermined voice processing device (not shown) and listens to the user. The voice call between the telephone terminals 30 can be performed.

Secondly, the present invention operates as follows when calling from an Internet telephone terminal to a general telephone terminal.

When the user of the Internet telephone terminal 30 attempts to make a call with the general telephone terminal through the user interface unit, the call attempt signal is transmitted to the Internet telephone terminal connection unit 14 through the processing of the protocol shown in FIG.

The Internet phone terminal connection unit 14 analyzes the call attempt signal through the protocol processing unit, and transmits the analysis result to the main control unit 15. The main controller 15 refers to the address conversion table configured therein, and determines whether the analysis result corresponds to the telephone number of the general telephone terminal. When the result of the address conversion table analysis corresponds to the telephone number of the general telephone terminal, the call command is transmitted to the general telephone terminal access unit 40.

When the general telephone terminal connection unit 40 receives a call command from the main control unit 15, the general telephone terminal connection unit 40 calls the general telephone terminal of the telephone number corresponding to the analysis result. Then, when the user of the called general telephone terminal picks up the handset to answer the call, a call is established between the Internet telephone terminal and the general telephone terminal to enable communication between each other.

Next, when the Internet telephone terminal 30 receives a voice signal generated by a user through a microphone, the voice telephone data is compressed through a predetermined voice processing apparatus using a voice compression method used on the Internet to generate voice packet data. do. The voice packet data is then transmitted to the Internet telephone terminal connection unit 14 using the Internet protocol (RTP / RTCP). The Internet phone terminal connection unit 14 transmits the voice packet data transmitted from the Internet phone terminal 30 to the data conversion unit 13 through the HDLC processing unit 14-1. Then, the data converter 13 restores the voice packet data transmitted by the HDLC processor 14-1 to the PCM signal by the voice compression / restore unit 13-2.

The PCM signal restored by the voice compression / recovery unit 13-2 is converted into a voice signal by the PCM codec (G.711) of the general telephone terminal connection unit 40. The general telephone terminal receives a voice signal converted by the PCM codec of the general telephone terminal connection unit 40 and listens to the user, thereby enabling mutual communication between the Internet telephone terminal and the general telephone terminal.

According to the present invention as described above it is possible to obtain the effect of enabling communication between the Internet phone terminal and the general telephone terminal to provide a communication service that can accommodate both the existing general telephone service users and Internet service users.

In addition, the present invention has the advantage that it is possible to provide a communication service at a lower price by being able to accommodate both a general telephone service and an Internet telephone service in one communication system.

Claims (5)

In an exchange system for calling a general telephone terminal and an internet telephone terminal, A plurality of general telephone terminal connection means connected to a general telephone terminal and converting a voice signal input from the general telephone terminal into digital data; Switch means for exchanging communication lines between subscribers; Data conversion means for compressing or restoring voice digital data applied from said switch means and data in the form of packets used in an Internet telephone terminal; And an internet phone terminal access means connected to an internet phone terminal and converting the voice packet data into an internet protocol to transmit the voice packet data to the internet phone terminal or vice versa. The method of claim 1, wherein the data conversion means PCM highway connecting means connected to the switch means for executing an interface with the PCM highway on the side of the general telephone terminal, Voice compression / restoration means for compressing voice PCM data used in a general telephone terminal into voice packet data used in an internet telephone terminal or restoring voice packet data used in an internet telephone terminal to voice PCM data used in a general telephone terminal and, High-level data link control (HDLC) inputted by the Internet telephone terminal access means by converting the voice packet data compressed by the voice compression / restore means into a high level data link control (HDLC) frame and transferring it to the Internet telephone terminal access means. HDLC processing means for decomposing and delivering the frame to the voice compression / restoration means, And data conversion control means for controlling each component of said PCM highway access means, voice compression / restore means, and said HDLC processing means in accordance with a command issued from said main control means. The method of claim 1, wherein the Internet telephone terminal access means HDLC processing means for receiving or transferring the compressed voice packet data from the HDLC processing means of the data conversion means; Internet protocol control means for converting the voice packet data into an internet protocol; And an Ethernet LAN connection means for transferring the data converted into the Internet protocol to the Internet. The apparatus of claim 1, further comprising main control means for controlling each system and storing an address conversion table for call setup between a general telephone terminal and an internet telephone terminal, and controlling a function of converting a telephone number and an internet protocol address. Telephone exchange system, characterized in that. 7. The apparatus according to claim 6, wherein the main control means includes call processing / protocol converting means for performing call processing or data conversion in a standardized protocol so as to enable communication between the general telephone access means and the Internet telephone access means. Telephone exchange system, characterized in that.