KR100406958B1 - VOIP(Voice Over Internet Protocol) Card Interface for keystation system - Google Patents

Abstract

The present invention provides an Internet connection interface for accessing a slot of a key station system main unit, wherein the data connected to the Internet network via a module jack is converted into a data format suitable for Internet communication, and the Internet is received. A signal converter for converting data into data suitable for an internal circuit, a transceiver for transmitting / receiving Internet data or internal packet data input / output through the signal converter, and outputting a display control signal according to the transmission / reception; A LAN connection unit including a display unit which displays a transmission / reception state of data to the outside according to a control signal; A control unit which extracts and outputs only a voice packet signal from data via the internet network output from the LAN connection unit and outputs the data processed in the reverse process to the LAN connection unit; A digital signal processor for compressing and restoring audio data signals inputted and outputted according to a control signal including an interrupt function of the controller, and removing and outputting an echo; It provides an Internet access interface for a key station system including a digital backplane interface for high-speed transmission of the voice signal data signal processed by the digital signal processor to a slot of a key station main device and interfacing the voice data of the slot through its reverse process. .

Description

Voice over Internet Protocol (VOIP) Card Interface for keystation system}

The present invention relates to an internet connection interface for a key station system, and more particularly, to a telephone station connected to an internet network using an extension telephone of a key station system. And a connection interface for connecting a network with the Internet.

In general, the key station system is a private switching system, which forms a communication path between a key station terminal connected therein and a general extension telephone, etc., and also forms a communication path with an external public circuit switching network (PSTN). It performs additional services such as voicemail function that other terminals require, and is widely used in organizations or companies of a certain size or more.

Hereinafter, a general key station system of the prior art will be described with reference to the accompanying drawings.

As shown in Fig. 1, the configuration of a general key station system main unit is as follows.

A control unit 1 for controlling the overall functions of the key station system, a switching unit 2 for setting the call path of each terminal belonging to the key station system, and to implement and provide various additional functions according to the requirements of each terminal An additional circuit section 3, various software programs, a memory section 4 storing and providing corresponding data as required by the control section 1, and a digital key station terminal 11; A key station interface unit 6 performing an interface function, a slot unit 7 for connecting general telephones and other devices for use as an extension by mounting various cards, the controller 1 and the key station interface The backplane interface unit 5 performing an interface function with the unit 6 and the slot unit 7, and various parameters generated by the controller 1. The serial interface unit 8 performs an interface function of transmitting meter values and status signals to an external computer, and receives AC power to generate DC power required for the operation of each component inside the key station system main unit. It is composed of a power supply unit 9 for supplying, and a ring generating unit 10 for generating and providing a ring signal necessary for an internal telephone extension for being mounted to the slot unit 7 via a card.

The operation of a general key station system as described above is as follows.

In the key station system, the control unit 1 performs the private exchange function by controlling the overall function of the key station system, and the control unit 1 controls the switching unit 2 so that the slot unit 7 is provided through the backplane interface 5. A telephone line of the digital key station terminal 11 connected to the extension general telephone (not shown) and the key station interface unit 6 connected through the slots of the terminal is formed.

That is, the switching unit 2 is not only a communication path between internal extension telephones (not shown) or a communication path and a mutual communication path between the digital key station terminals 11, but also to a public line switching network (not shown). Form a currency path.

In addition, the controller 1 controls the additional circuit unit 3 to provide various additional services required by the respective extension telephones and digital key station terminals 11.

The control unit 1 stores and uses a software program and various data necessary for performing the above operation in the memory unit 4.

In addition, the control unit 1 outputs the states generated in various controls and other necessary parameter values through the serial interface unit 8 so that an administrator can monitor the operation of the key station system using a computer or the like. .

The ring generating unit 10 generates and provides a ring signal necessary for an internal telephone extension for being mounted to the slot unit 7 through a card, and the control unit 9 receives an AC power and operates the components. Create and supply DC power required for

By operating as described above, the general key station system provides private exchange service and supplementary service to the connected digital key station terminal and the extension general telephone.

However, with the development of communication technology, the walls between communication media are being broken down, and the connection between different media is required, and telephone communication using the internet network as well as telephone communication through the previous telephone network is being spread at low prices. Therefore, there is a demand for a system capable of talking with a telephone connected to the Internet network using a telephone connected to an existing key station system.

However, the general key station system of the prior art operating as described above does not meet the above requirements, and there is a problem in that it cannot directly connect with the Internet network.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and by using a telephone connected to a key station system, an internet connection interface for a key station system that enables a telephone call to be connected to an internet network. Is in providing.

1 is a block diagram applying a general key station system claim,

2 illustrates a highway data frame structure of a key station;

3 is a block diagram applying an Internet access interface for a key station system according to an embodiment of the present invention;

4 is a B channel interface timing diagram between the digital signal processor and the digital backplane interface in FIG. 3.

Explanation of symbols on the main parts of the drawings

20: control unit 30: digital backplane interface

40: digital signal processing unit 50: LAN connection unit

51: module jack 52: signal conversion unit

53: transceiver 54: display

60: memory section 70: RS232C section

80: address decoder 90: Internet network

In order to achieve the above object, the present invention provides an Internet connection interface for accessing a slot of a key station system main unit, and converts data output through the module jack to the Internet network and output to the Internet network into a data format suitable for Internet communication. A signal conversion unit for outputting and converting the received Internet data into data suitable for internal circuits, and a transmission / reception unit for transmitting / receiving Internet data or internal packet data input / output through the signal conversion unit and outputting a display control signal according to the transmission / reception. And LAN connection unit including a display unit for displaying the transmission and reception state of the data to the outside according to the display control signal of the transmission and reception unit; Extracts and outputs only the voice packet signal from the data via the Internet network output from the LAN connection unit and vice versa Output the processed data to LAN connection Compression and decompression process voice data signal which is output in accordance with a control signal that contains the interrupt function of the controller and the digital signal processing section and outputting the echo removal; and a control unit;

It provides an Internet access interface for a key station system including a digital backplane interface for high-speed transmission of the voice signal data signal processed by the digital signal processor to a slot of a key station main device and interfacing the voice data of the slot through its reverse process. .

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in Fig. 3, the configuration of the Internet connection interface for the key station system according to the embodiment of the present invention is as follows.

A digital backplane interface 30 connected to the slot 7 of the key station system main unit and interfacing voice signals in a highway manner with the control unit of the key station system main unit;

LAN connection unit 50 for supporting the connection with the Internet network 90;

A digital signal processor 40 operating according to an input control signal to perform high speed digital signal processing such as compression / extension and echo cancellation of a voice signal input and output through the digital backplane interface 30;

A controller 20 for generating and outputting an overall control signal necessary for the operation of the digital backplane interface 40, the LAN connection unit 50, and the digital signal processing unit 40;

An RS232C unit 70 for allowing an administrator to monitor the control operation through a computer by outputting various signals and parameters processed by the controller 20 to the outside;

A memory unit 60 for storing software programs and data necessary for the operation of the controller 20 and outputting the software program and data according to a request of the controller 20;

And an address decoder 80 for decoding an address necessary for the operation of the control unit 20.

The LAN connection unit 50 includes a modular jack 51, which is a connection terminal with the Internet network 90, a transceiver 53 for transmitting and receiving data with the Internet network, and the transceiver unit. The signal conversion unit 52 converts the data output from the 53 into a data form used in a LAN of the Internet network, and converts the data input from the Internet network into a signal form that can be processed by the control unit 20. And a display unit 54 for displaying the data transmission / reception state of the signal conversion unit 52 and the transmission / reception unit 53 for the user to see.

Operation of the embodiment of the present invention made as described above is as follows.

In the case where the key station system main unit is to make a telephone connection using the internet network, the telephone voice signal is converted into the signal of the internet network by connecting to the internet network 90 through the interface 100 mounted in the key station system main slot 7. Interconversion allows for phone calls.

First, the digital backplane interface 30 is connected to the slot 7 of the key station system main unit to interface the voice signal with the control unit of the key station system main unit in a highway manner.

As shown in FIG. 2, the data frame structure of the highway method is generally one frame FRAME as shown in (A) and eight subframes (SUB) as shown in (B). FRAME), and the configuration of each subframe is as shown in (c). The HDLC channel of 512 Kbps and the D channel (D) and the six audio channels of 64 Kbps (B CH0 to B CH5) Is done.

Accordingly, there are 48 voice channels of 64Kbps in the highway data frame between the digital backplane interface 30 and the key station system main unit, wherein the audio signals are pulse coded modulation of 8 bits per frame (8Khz). It is 64Kbps because it consists of PCM) data.

In this case, the control unit 20 exchanges data with the control unit of the key station system main unit at a speed of 512 Kbps using the HDLC channel through the digital backplane interface 30.

In addition, the data transmission of the digital backplane interface 30 and the digital signal processing unit 40 is shown as shown in FIG. 4, which is applied to a synchronization signal FSYNCH applied from the key station system main apparatus through the digital backplane interface 30. And the data of the transmission voice signal TXB and the reception voice signal RXB in synchronization with the BCLK signal of 128 KHz shown in Fig. 4E, as shown in Figs. 4B and 4G. Replace with the same timing chart.

On the other hand, the signal input from the Internet network 90 is introduced through the module jack 51 of the LAN connection unit 50, and this signal is received by the signal conversion unit 52 in the packet transmission state of the Internet signal in the interface ( The signal is converted into a signal that can be processed by the control unit 20 of the control unit 20 and transmitted to the transmission / reception unit 53.

The transmitter / receiver 53 transmits a signal input from the signal converter 52 through the SCC port 21 of the controller 20, and the display unit made of a light emitting diode (LED) during this transmission operation. 54) to indicate to the administrator that the transmission and reception operation is being made.

The control unit 20 extracts only data corresponding to a voice signal from data from the Internet network input from the LAN connection unit 50 and outputs the data to the digital signal processing unit 40, and the digital signal processing unit 40 controls the control unit. The voice data input from the 20 is subjected to high speed signal processing to decompress the compressed data and remove echo.

The digital signal processor 40 transmits the signal processed data to the digital backplane interface 30, and the digital backplane interface 30 transmits the data through the key station system main slot 7. It is loaded with the audio signal of the pulse code modulation method on the audio channel and transmitted to the control unit of the key station system main unit.

Similarly, voice data transmitted from the key station system to the digital backplane interface 30 as a highway signal can also be transferred to the Internet network in the reverse procedure to perform a telephone call.

Meanwhile, in the process of transmitting and receiving a voice signal between the digital signal processor 30 and the controller 20, signal processing of voice compression and echo cancellation of the digital signal processor 40 is processed in an interrupt manner. The processing state of the voice signal transmitted from 20 can be recognized through the IRQ signal.

In general, since the voice data in the Internet environment is transmitted in a packet manner, the delay and echo phenomenon of the voice data appear severely, and the digital signal processor 40 is used to compensate for this phenomenon.

And, through the RS232C unit 70 mounted on the control unit 20, the administrator can monitor the signal processing operation by sending and receiving a status signal, etc. using a computer, etc., to prepare the transmission and reception statistical data, etc. Can be.

By operating as described above, the present invention can be mounted on an existing key station system main unit, so that the key station system can perform a telephone exchange function in an Internet environment.

The present invention described above is not limited to the above-described embodiment and the accompanying drawings, and various substitutions, conversions, and modifications are possible within the scope without departing from the technical spirit of the present invention. It will be apparent to those who have knowledge.

Therefore, the present invention operating as described above has the effect of using a telephone connected to the key station system and talking to a telephone connected to the Internet network.

Claims (2)

In the interface for the Internet connection to the slot of the key station system main unit, A signal conversion unit connected to the internet network via a module jack and converting the data output to the internet network into a data format suitable for internet communication and converting the received internet data into data suitable for an internal circuit; A transmission / reception unit for transmitting / receiving Internet data or internal packet data input / output through a conversion unit and outputting a display control signal according to the transmission / reception, and a display unit for externally displaying a transmission / reception state of data according to the display control signal of the transmission / reception unit LAN connection part; A control unit which extracts and outputs only a voice packet signal from data via the internet network output from the LAN connection unit and outputs the data processed in the reverse process to the LAN connection unit; A digital signal processor for compressing and restoring audio data signals inputted and outputted according to a control signal including an interrupt function of the controller, and removing and outputting an echo; And a digital backplane interface for high speed transmission of the voice signal data signal processed by the digital signal processor to the slot of the key station main device and interfacing the voice data of the slot through the reverse process. interface. delete