KR100871511B1 - Key telephone system having dual data transmission path between main board and peripheral bord and method for transmitting data using the same - Google Patents

Abstract

Disclosed are a key phone system having a dual data transmission path between a main board and a peripheral board, and a data transmission method using the same. In a key phone system including a main board and a main board, a high-level Data Link Control (HDLC) channel, and a plurality of peripheral boards transmitting and receiving data through a local area network (LAN), the relatively high importance data is transferred to the HDLC channel. Transmit and receive data, and data of relatively low importance and smaller than a threshold value are transmitted and received through the LAN. When a large amount of data exceeding the data communication capacity is gathered at once, by transferring the relatively insignificant data through the LAN port, it can effectively prevent data loss and delay, and provide stable data communication.

Keyphone, HDLC, LAN, data, transmission, path

Description

KEY TELEPHONE SYSTEM HAVING DUAL DATA TRANSMISSION PATH BETWEEN MAIN BOARD AND PERIPHERAL BORD AND METHOD FOR TRANSMITTING DATA USING THE SAME}

1 is a schematic view showing the configuration of a conventional key phone system including a main board and a peripheral board.

Figure 2 is a schematic diagram showing an example of data transmission between the main board and the peripheral board of the conventional key phone system.

Figure 3 is a block diagram showing the main board and the peripheral board of the key phone system according to an embodiment of the present invention.

Figure 4 is a schematic diagram showing an example of data transmission between the main board and the peripheral board of the key phone system according to an embodiment of the present invention.

5 is a flowchart showing an example of setting a data transmission path between a main board and a peripheral board of a key phone system according to an embodiment of the present invention.

The present invention relates to a key telephone system, and more particularly, to a key phone system having a dual data transmission path between a main board and a peripheral board and a data transmission method using the same.

Keyphone systems for call connections between subscribing extension phones and for call connections between extension and external telephones include a main board equipped with a central processing unit (CPU) for monitoring and controlling the overall functionality of the system. . As shown in FIG. 1, a main board 10 is connected with a plurality of peripheral boads 12 for an Integrated Service Digital Network (ISDN) or Voice Over Internet Protocol (VoIP) interface. The data communication between the main board and the peripheral board follows the HDLC procedure of splitting and transmitting data in units of frames including a transmission control code. For HDLC communication, an HDLC port or HDLC device in the CPU is used.

FIG. 1 shows links 14 and 15 configured in accordance with a set normal response mode (SNRM) scheme for main board 11 and a plurality of peripheral boards 12 to communicate data through HDLC device 13. . The data transfer rate is determined by the clock applied to the HDLC device.

Generally, a clock of 512 Kbps or 1 Mbps is applied to HDLC devices, but the clock of 512 Kbps or 1 Mbps is not dedicated to data transmission between the motherboard and one peripheral board, and is divided according to the number of peripheral boards connected to the motherboard. do. For example, if one main board and 10 peripheral boards are designed to exchange data once per 100 ms interval, the time allowed for data communication between one peripheral board and main board is 1/10 of 100 ms. 10 ms.

Except for the header and the like during data transmission, the actual size of data that can be transmitted for 10 ms is about 512 bytes. Since data is transmitted and received between the main board and the peripheral board for 10 ms, the size of data that can be transmitted for 10 ms from one side is 256 bytes. In other words, one peripheral board can send or receive data of about 256 bytes at a time for 10 ms.

Since the amount of data that one peripheral board can transmit at a predetermined time is limited, as shown in FIG. 2, the transmission data (Tx data) or the reception data of a threshold or higher in the transmitter 21 or the receiver 22 of the HDLC device as shown in FIG. 2. When (Rx data) is transmitted or received via the HDLC channel, data transmission is delayed or data loss occurs. In particular, when a transmission delay or loss such as a command for resource usage of the peripheral board and the main board occurs, there is a problem in resource management of the boards.

SUMMARY OF THE INVENTION The present invention for solving the above problems provides a key phone system having a dual data transmission path between a main board and a peripheral board and a data transmission method using the same, which can prevent delay and loss of data transmission. There is a purpose.

Key phone system according to an embodiment of the present invention mainboard; And a plurality of peripheral boards connected to the main board and transmitting and receiving data through the high-level Data Link Control (HDLC) channel and a local area network (LAN). The keyphone system transmits and receives data of relatively high importance through the HDLC, and transmits and receives data of relatively low importance and smaller than a threshold value through the LAN.

The main board according to an embodiment of the present invention, the first transceiver for transmitting and receiving data with the plurality of peripheral boards through the HDLC channel or the LAN; And a first path determiner configured to determine a data transmission path of either the HDLC channel or the LAN. Each peripheral board according to an embodiment of the present invention, the second transceiver for transmitting and receiving data with the mainboard via the HDLC channel or the LAN; And a second path determiner for determining a data transmission path of any one of the HDLC channel and the LAN.

In accordance with another aspect of the present invention, a data transmission / reception method includes a main phone and a key phone including a plurality of peripheral boards for transmitting and receiving data through a high-level Data Link Control (HDLC) channel and a local area network (LAN). In the system, data of relatively high importance is transmitted and received through the HDLC channel, and data of relatively low importance and smaller than a threshold is transmitted and received through the LAN.

According to an embodiment of the present invention, the method determines the size of transmission data, compares the size of the transmission data with a threshold, and if the size of the transmission data is smaller than the threshold, transmits data over the HDLC channel, If the size of the transmission data is larger than the threshold, it is determined whether it is important data, and if the size of the transmission data is larger than the threshold and the data is of relatively high importance, the transmission data is transmitted through the HDLC channel, and the transmission is performed. If the size of the data is larger than the threshold and relatively low in importance, the transmission data is transmitted over the LAN.

In addition, the storage medium according to an embodiment of the present invention, the computer readable instructions for performing the above-described method.

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

As shown in FIG. 3, the keyphone system includes a main board 100 and a plurality of peripheral boards 200 connected to the main board 100. The main board 100 and each peripheral board 200 transmit and receive data through a binary path, that is, a high-level Data Link Control (HDLC) channel and a local area network (LAN).

The main board 100 controls data communication through an HDLC channel, controls a high speed communication channel (Highway) of ISC (inter-system communication), and adjusts and exchanges gain of a transmit / receive pulse coded modulation (PCM) signal. It performs the basic functions of key phone system such as PCM tone generation, system synchronization signal generation and call control. To this end, the motherboard 100 has a central processing unit (CPU) 130 to control and manage all resources in the system. The plurality of peripheral boards 200 are boards for an Integrated Service Digital Network (ISDN) or Voice Over Internet Protocol (VoIP) interface. The main board 100 and each peripheral board 200 are provided with LAN ports for various applications.

The main board 100 is a first transceiver 110 for transmitting / receiving data with a plurality of peripheral boards 200 through an HDLC channel or a LAN, and a first transmission path for determining any one of an HDLC channel or a LAN. The path determining unit 120 further includes. Similar to the main board 100, each peripheral board 200 also transmits data of any one of the second transceiver 210 and the HDLC channel or LAN for transmitting and receiving data to and from the main board 100 through an HDLC channel or a LAN. A second path determiner 220 for determining a path is included. The first transceiver 110 and the second transceiver 120 are implemented with a LAN port and an HDLC port. Alternatively, the first transceiver 110 and the second transceiver 120 are implemented with a LAN port and an HDLC device.

Referring to FIG. 4, the path determiner 420 commonly represents the first path determiner 120 and the second path determiner 220 shown in FIG. 3. That is, the function of the path determiner 420 represents the functions of the first path determiner 120 of the main board 100 and the second path determiner 220 of the peripheral board 200.

4 and 5, the path determiner 420 determines the size of the transmission data (510), and compares the size of the transmission data with a threshold (520). If the size of the transmission data is smaller than the threshold, the data is transmitted through the HDLC channel (path A) (530). That is, when the size of the transmission data is smaller than the threshold, data is transmitted through the HDLC device or the HDLC port 400 along the path A without distinguishing important data and other data.

If the size of the transmission data is larger than the threshold, it is determined whether it is important data (540). For example, call control data is determined to be relatively high data, and data related to on / off of a light emitting device (LED) of the system is determined to be relatively low data.

If the importance of the transmission data is relatively high, the data is transmitted through the HDLC channel (path A) (530). That is, when the size of the transmission data is larger than the threshold but the data is of high importance, data is transmitted through the HDLC device or the HDLC port 400 along the path A.

If the size of the transmitted data is greater than the threshold and the importance is relatively low, the data is transmitted over the LAN (path B) (550). On the other hand, since not only the communication data of the main board 100 and the peripheral board 200 but also various data are transmitted and received through the LAN port, the transmitters 110 and 210 of the main board 100 and the peripheral board 100 recognize each other. Information about the IP address, port number, and board identification of the other party can be stored in advance.

The following Table 1 is an IP table provided in the transceiver 110 of the main board 100 and shows information of peripheral boards.

Peripheral Board IP Address Port number Peripheral Board ID  send One 10.10.10.5 5000 PERIPHERAL 1  UDP 2 10.10.10.6 6000 PERIPHERAL 2  TCP ... ... ... ... ...

The following Table 2 is an IP table provided in the transmitter 210 of the peripheral board 200 having the 'PERIPHERAL 1' identifier among the peripheral boards for data communication with the main board 100.

Motherboard IP address Port number  ID  send One 10.10.10.1 5000 MAIN  UDP

Among various types of data transmitted through the LAN port, communication data between the main board 100 and the peripheral board 200 is divided according to the following method. For example, the data transmitted from the motherboard 100 to the peripheral board 200 having the identifier 'PERIPHERAL 1' includes' src.ip = 10.10.10.1 src.port = 5000 dest.ip = 10.10.10.5 dest.port Since information such as '5000' is transmitted and is transmitted through UDP, the peripheral board 'PERIPHERAL 1' 200 is 'src.ip', 'src.port', and 'dest.' In a message transmitted from the main board 100. You can distinguish the message sent from the motherboard from the entries in 'ip', 'dest.port'. In addition, the data transmission error may be reconfirmed from the IP of the peripheral board 200 included in the data.

The path determining unit 420, that is, the first path determining unit 120 and the second path determining unit 220 are provided on the main board 100 and the peripheral board 200, respectively, and have a size greater than or equal to a threshold and have a relatively high importance. By determining the path so that low data is transmitted through the LAN, it is possible to increase the transmission efficiency of the HDLC channel. Accordingly, it is possible to prevent transmission delays or losses such as commands for resource usage of peripheral boards and main boards.

Although the above methods have been described through specific embodiments, the above-described data transfer method may be embodied as computer readable codes on a computer readable recording medium. Computer-readable recording media include all kinds of recording devices that store data that can be read by a computer system. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disks, optical data storage devices, and the like, which are also implemented in the form of carrier waves (for example, transmission over the Internet). Include. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily inferred by programmers in the art to which the present invention belongs.

In addition, while the present invention has been described in connection with some embodiments, it is to be understood that various modifications and changes can be made without departing from the spirit and scope of the invention as will be understood by those skilled in the art. You will need to know Also, such modifications and variations are intended to fall within the scope of the claims appended hereto.

According to the present invention made as described above, when a large amount of data exceeding the data communication capacity is gathered at once, by transmitting a relatively insignificant data through the LAN port to effectively prevent data loss and delay, stable It can provide data communication.

Claims (10)

As a key phone system, Main board; And A plurality of peripheral boards connected to the main board and transmitting and receiving data through the high-level Data Link Control (HDLC) channel and a local area network (LAN) with the main board, Data smaller than the threshold is transmitted and received through the HDLC channel, and data larger than the threshold is transmitted and received through the LAN, Call control data of the data larger than the threshold is transmitted and received over the HDLC channel. The method of claim 1, The main board, A first transceiver for transmitting and receiving data with the plurality of peripheral boards through the HDLC channel or the LAN; And And a first path determiner for determining a data transmission path of either the HDLC channel or the LAN. The method of claim 2, Each peripheral board, A second transceiver for transmitting and receiving data with the mainboard via the HDLC channel or the LAN; And And a second path determiner for determining a data transmission path of either the HDLC channel or the LAN. The method according to any one of claims 1 to 3, Wherein the plurality of peripheral boards are boards for an Integrated Service Digital Network (ISDN) or Voice Over Internet Protocol (VoIP) interface. The method of claim 4, wherein The data transmitted and received via the LAN includes on / off data and display data of a light emitting diode (LED). A data transmission / reception method of a key phone system including a main board and a plurality of peripheral boards transmitting and receiving data to and from the main board through a high-level Data Link Control (HDLC) channel and a local area network (LAN), Data smaller than the threshold is transmitted and received through the HDLC channel, and data larger than the threshold is transmitted and received through the LAN. Call control data of data larger than the threshold is transmitted and received through the HDLC channel. delete The method of claim 6, The plurality of peripheral boards are boards for an Integrated Service Digital Network (ISDN) or Voice Over Internet Protocol (VoIP) interface. The method of claim 6, The data transmitted and received via the LAN includes on / off data and display data of a light emitting diode (LED). 10. A storage medium having stored thereon computer readable instructions for performing the method of any one of claims 6, 8 or 9.

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