CZ20023614A3 - Closed loop digital network consisting of telephone exchange and telephone push-button dialing system and method for transmission of signal through said closed loop digital network - Google Patents

Abstract

The closed digital network is composed of a telephone exchange (10) and series of telephone sets (20), with each telephone the apparatus (20) is further connected to a network device (30) such as a network device (30) computer, core-center, network printer, etc. Closed all over the network, data and image information are transmitted in the form of packets. In addition, communicating voice signals are converted into a shape voice packets by telephone (20). Further, in closed network is set to transfer priority between voice packets, data packets, and \ t therefore, although a large amount is being transmitted packets, voice packets retain the actual transmission time.

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a closed digital network comprising a telephone switchboard and a key telephone system and a method for transmitting a signal through such a digital closed network, and more particularly to a closed digital network that provides voice, data and voice signal functions while maintaining excellent communication quality.

BACKGROUND OF THE INVENTION

Because the Voice over Internet Protocol (VolP) system has lower cost of communication than conventional telephone systems and better ability to integrate data, more and more businesses are using the Internet Protocol as a means of communication. Based on the registered Internet Protocol (VolP), an enterprise can simultaneously transmit voice, data and video signals over a single Internet Protocol (IP) platform. Therefore, in addition to simplifying the management process network, there is an overall cost reduction. In FIG. 4, the LAN local area network incorporated into the PABX system is composed mainly of the Middle Ages 70 of the computers 71 and the PABX 72, the middle-core 70 being further associated with the memory extension 73. In FIG. 5, a core 70 is connected to a plurality of computers 71, some specific computers 71 being respectively connected to a telephone exchange 72 and a memory extension 73.

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In the above-mentioned computer network architecture, the memory extension 73 occupies only part of the bandwidth (e.g., 4K) for voice transmission. However, in the case of a conventional IP or LAN, the data signals (data packet) are the main subject of transmission. The long-term goal of the proposed network architecture is still focused on improving reliability, that is, the data packet has the highest transmission priority during the transmission process. Under such conditions, when a large amount of data is transmitted between computers 71, correspondingly serious problems such as delayed transmission of the voice signal and pulse variation will arise. However, for the voice signal, the most important requirement is an immediate transmission (i.e., the actual transmission time). Therefore, poor transmission quality is a malfunction.

The conventional configuration of the conventional network is not able to solve the problems related to signal transmission delay. One of the current ways to improve the quality of voice signal transmission and to solve this problem is to use a wide bandwidth. However, when a large amount of data is being transmitted, it still causes delays in the voices, and such a current solution cannot completely eliminate the problem.

In short, the digital closed net according to the present invention removes the above-mentioned drawbacks.

SUMMARY OF THE INVENTION

The primary object of the present invention is to provide a closed digital network that is comprised of a central office, a push-button telephone system (KTS) and computers for transmitting voice, data and video signals while maintaining super-quality voice transmission.

To achieve this, the transmission method for the network of the present invention uses the telephone as an expansion node to connect to network devices such as a personal computer or a telephone exchange to form a closed network. The phone not only processes data and video packets, it also has the ability to convert a signal to convert voice signals into a form of voice packets. Since voice signals are transmitted in the form of voice packets in the network, interference caused by a large number of data and video packets can be eliminated, and transmission quality is improved.

This handset is also capable of setting priority functions for deciding the priority of transmission between voice packets and other packet types. If the voice packets are set with the highest priority, it is possible to meet the real-time transmission requirement for the voice packet while maintaining good reliability for data and video packets.

The network architecture of the present invention comprises:

at least one private branch exchange (PBX) interconnected with a series of trunk lines or leased lines in which the packet processing unit for converting voice signals into voice packet shape is located within the PBX, a series of telephones connected to the PBX to form a PBX a closed network construction for the transmission of voice, data and video signals, and a number of network devices such as computers, printers, cores, etc., respectively connected to telephones.

Each telephone also consists of:

a bi-directional conversion function control unit, wherein the control unit is capable of converting voice signals into voice packet shape and is capable of returning voice packets to the initial state into voice signals, a handset for receiving voice signals from the user and subsequently transmitting the received signals to the control unit; sending voice signals from the control unit,

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a first network connecting the interface between the control unit and the network device, and a second network connecting the interface between the control unit and the PBX.

In this present network structure, voice, data or video packets are capable of being transmitted between network devices through a variety of telephone sets. In addition, these packets are capable of being transmitted to an external network through a PBX. Since voice is transmitted in the form of voice packets, the requirements for the actual time of voice transmission and the high reliability of data / video packet transmission are satisfactorily met.

Clarification of the figures in the drawings

Giant. 1 is a functional block diagram of a closed digital network configuration according to the present invention;

Giant. 2A-2C are a schematic topology illustrating a network PBX (PBX) connected to a series of telephone sets in a closed network according to the present invention;

Giant. 3 is a schematic view of a preferred embodiment of a closed net according to the present invention,

Giant. 4 is a functional block diagram of a conventional network configuration,

Giant. 5 is another functional block diagram of a conventional network configuration.

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Detailed description of an example of a preferred embodiment

Referring to FIG. 1, we present a closed network according to the present invention which is comprised of at least one telephone exchange (PBX) of a 10th push-button telephone system (KTS) comprising a series of telephone sets 20 and network equipment 30.

The PBX 10 associated with a series of long-distance or leased lines (e.g., XDSL) has a packet processing unit 11 for bi-directional conversion, i.e. to convert external voice signals into voice packet shape, or to return voice packets to their initial state into voice signals.

The telephone line 30 is capable of being connected to a PBX 10 with different topologies (as shown in Figures 2A-2C) to form a closed network for the transmission of voice, data and video signals.

Network devices 30, such as personal computers (example in this embodiment), network printers, middle or facsimile devices, etc., are respectively connected to telephone sets 20 to communicate with the closed network.

Each telephone apparatus 20 further comprises:

a bidirectional conversion control unit 20, wherein the control unit 20 is capable of converting voice signals into voice packets and is able to return voice packets to the initial state into voice signals, a handset 22 for receiving voice signals from a user and for subsequent transmission to the control unit 21 or to transmit voice signals from the output of the controller 21, a first network interface 23 between the controller 21 and the network device 30, wherein the first network interface 23 is for connection to a network interface board installed in the device 30.

a second network interface 24 between the controller 21 and the PBX 10, a keyboard 25 connected to the input terminals of the controller 21 for parameter selection or input, a display 26 connected to the output of the controller 21 to display messages or images, and a collection device 27 image data such as a CCD camera (ChargeCoupled Device) connected to the input of the terminal of the image collection controller 21, the collected images are further processed by the controller 21 to take the form of video packets for further transmission.

Each telephone 20 further comprises a jumper 28 between the first network interface 23 and the second network interface 24 to effect control of the closed network transmission flow.

The PBX10 further has an interface 12 connecting not only the packet processing unit H, but also connects to the second network the interface 24 of each telephone 20.

It follows from the description of the network architecture that a number of telephones 20 not only build a closed network together with the PBX 10, but each telephone 20 is also used as an intermediate node that allows a personal computer, core printer or network printer etc. to communicate with the closed network. (as shown in Figure 3).

It should be pointed out in particular that if a voice signal is transmitted via a closed network, the network will ensure superior transmission quality. For example, if one telephone 20 is used as a transmitter (voice source), the input voice from the handset 22 is converted to the form of voice packets by the control unit 21 and then transmitted throughout the closed network. After the other handset 20 acting as the handset receives and converts the voice packet into a voice signal by the control unit 21, the voice signal is transmitted by the handset 22.

Since voice is transmitted in the form of voice packets, problems with pulse delay and pulse variation are overcome in this way. In addition, by controlling the controller 21 and the bridge 28 to ensure consistent prioritization of transmission between voice packets and video packets, the transmission quality is capable of further improvement. In other words, the actual time of voice transmission is secured by a controlled flow of the closed network.

Finally, it should be noted that the particular network architecture of the present invention, together with a telephone system with packet conversion and function bridging capability, together provides instant voice transmission, while problems with delay and pulse fluctuations are eliminated. We add that the network architecture of the present invention also conforms to the Data Transfer Protocol (IEEE 802.3) to ensure accurate data / video packet transmission between all network nodes. In other words, the present invention maintains high reliability of data transmission or image transmission.

Note; IEEE - Society of Electrical and Electronics Workers - USA.

Claims (10)

PATENT CLAIMS 4 4 4 4 44 44 • · 4 4 4 * • 4 4 4 4 44 * 444 44 44 A method of transmitting a closed network signal comprising at least one telephone exchange and a push-button telephone system comprising a plurality of telephone sets, the method comprising the following steps: connecting each telephone to a telephone exchange, deploying each telephone as a node to connect to a network device to form a closed network for voice, data and video transmission, and converting the voices received from the first of the telephone sets into voice packets, voice transmission packets to a second telephone set from a plurality of telephone sets, the second telephone set from a plurality of telephone sets converts and transmits voice packets into the form of voice signals. The method of claim 1, further comprising the step of setting the transmission priority, wherein the voice packets are set with the highest transmission priority by adjusting the telephone set. The method of claim 1, wherein the telephone exchange further has a bidirectional conversion function, wherein the telephone exchange is capable of converting external voice signals into voice packet shape, or returning voice packets to the initial state of voice signals. 4. The digital closed network shall consist of: at least one telephone exchange connected to a series of long-distance / leased lines, the telephone exchange having a voice packet conversion and return function; 5 «·· ··> · 4 4 9 9 několik 99 · • ♦ · · · · · několik několik · · několik několik několik · · několik několik několik · · několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik několik each network device is connected to one of the multiple telephone sets to communicate with the telephone exchange. The digital closed network of claim 4, wherein each telephone set comprises: a bi-directional conversion control unit, wherein the control unit is capable of converting voice signals into voice packet shape and is capable of restoring voice packets to voice signals, the handset transmitting the received voice signals to the control unit, wherein the handset is capable of transmitting voice signal output from a first network interface between the control unit and one of the network equipment, and a second network interface between the control unit and the telephone exchange. The digital closed network of claim 5, wherein the telephone exchange comprises a packet processing unit located between the plurality of trunk lines and the interface, wherein the interface is intended to communicate with the interface of the second network. The digital closed network of claim 5, wherein the interface of the first network is connected to the network device through a network interface board installed in the network device. The digital closed network of claim 5, wherein each telephone apparatus comprises a bridge between the interface of the first network and the interface of the second network to control the flow of the transmission. • 4 • 4 • 4 · 4 • 4 4 4 4444 4 • 444 44 The digital closed network of claim 5, wherein the controller is further connected to a display, keyboard, and image acquisition device. The digital closed network of claim 4, wherein the network devices are selected from the group consisting of a computer, a mid-core, a network printer, or a facsimile device.