KR100428772B1 - Key-phone system with voice-over digital subscriber line - Google Patents

Abstract

The present invention provides an ADSL modem which performs a role such as modulation for transmitting and receiving an ADSL packet to a public network by a voDSL trunk card unit which transmits and receives data to a voice digital subscriber line provided in a key phone system. A main processor unit for providing control and data paths and converting a voice frame into the ADSL packet, and a voice processing unit for compressing an actual voice signal and performing frame operations to generate PCM data, wherein the voice processing unit is an actual analog signal. The present invention provides a key phone system having a voice digital subscriber line having an erasable programmable logic device (EPLD) for performing a bidirectional linkage operation between a digital processing signal and a DSP for performing an operation or transformation on a transmitted digital signal.

Description

KEY-PHONE SYSTEM WITH VOICE-OVER DIGITAL SUBSCRIBER LINE}

The present invention relates to a keyphone system and more particularly to a keyphone system comprising a trunk card with a voice digital subscriber line.

Generally, an integrated access device (hereinafter referred to as IAD) connected to the voDSL to connect a keyphone system to a voice-over digital subscriber line (hereinafter referred to as voDSL) at home. Install the IAD to the keyphone system.

As shown in FIG. 1, the voDSL IAD device 100 includes an ADSL modem 101 including an Asynchronous Digital Subscribe Line (ADSL) line for transmitting and receiving data to and from an external server, and the voice frame of the voDSL IAD device. The main processor 102 for converting the ADSL packet, the heterogeneous interface (Interface 103) connected to the other interface, the digital signal processor (104) for performing the operation or transformation on the transmitted digital signal (Digital Signal). Coder (Coder / Decoder, Compression / Decompression, 105, CODEC hereinafter) related to switching between analog signal and digital signal, Slick (Subscriber Line Interface Circuit) , 106, hereinafter referred to as SLIC).

In addition, the analog trunk (Analog Trunk, A-Trk, 110) that is connected to the SLIC to exchange analog voice data and the main controller 120 of the keyphone connected to the analog trunk to exchange data It is necessary to send and receive voice data.

The main controller 120 of the key phone is also connected to a digital line interface (DLI) 121 and a subscriber line interface (SLI) 122.

PCM (PULSE CODE MODULATION) data exists between the DSP and the CODEC, and an analog voice signal exists between the CODEC and the SLIC. In the SLIC, the voDSL service is implemented by receiving an analog voice signal and connecting an analog trunk of a key phone system. At this time, each port of the SLIC circuit connected to the analog trunk is recognized as CO.

In case of the conventional IDA, DSP, CODEC, and several channel SLIC circuits are provided in the conventional IDA, but interworking with a general telephone is possible, but the port of the SLIC circuit is connected to the analog trunk of the keyphone system for interworking with the key phone system. Should be connected to Therefore, there is a problem in that the call quality is reduced and the cost is increased because several data conversions are required after passing through several cards.

In order to solve the above problems, the present invention puts PCM data and control signals directly on the highway, which is a data transmission path of the keyphone system, when the keyphone system and the voDSL are connected, thereby reducing the number of data conversions and improving call quality and lowering costs. Provides a keyphone system including a voice digital subscriber line.

1 is a diagram illustrating a connection between a conventional key phone and an integrated access device having a voice digital subscriber line.

2 is a key phone system including a trunk card with a voice digital subscriber line in accordance with an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: IAD 101: ADSL Modem

102: main processor 103: heterogeneous interface

104: DSP 105: CODEC

106: SLIC 110: analog trunk

120: keyphone main controller 121: DLI

122: SLI

200: voDSL trunk card 211 DSP

222: EPLD

In order to achieve the above object, the present invention provides an ADSL modem in which a voDSL trunk card unit performing transmission and reception of data to a voice digital subscriber line provided in a key phone system performs a role such as modulation to transmit an ADSL packet to a public network. A main processor unit providing overall control and data path of the voDSL trunk card and converting a voice frame into the ADSL packet, and a voice processing unit compressing an actual voice signal and performing frame operation to generate PCM data; The voice processing unit is a key phone having a voice digital subscriber line including an erasable programmable logic device (EPLD) that performs bidirectional linkage between an actual analog signal and a digital processing signal, and a DSP that performs an operation or transformation on a transmitted digital signal. Provide a system.

In addition, the voDSL trunk card unit for transmitting and receiving data to the voice digital subscriber line provided in the key phone system ADSL modem for performing the role of modulation, such as to transmit the ADSL packet to the public network, the overall of the voDSL trunk card A main processor unit for providing control and data paths and converting a voice frame into the ADSL packet, and a voice processing unit for compressing an actual voice signal and performing frame operations to generate PCM data, wherein the voice processing unit is a real analog signal. 10. A keyphone system having a voice digital subscriber line having an EPLD for performing a bidirectional linkage operation between a digital signal and a digital processing signal and a DSP for performing an operation or transformation on a transmitted digital signal, wherein the DSP generates a control signal. The voice processing unit As the generated PCM data to provide a control method in which the phone system includes a voice digital subscriber lines for controlling said phone system and transmits it to the phone system of the highway.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. Hereinafter, repeated description of the same member having the same reference number will be avoided.

Referring to FIG. 2, in a key phone system having a voice digital subscriber line according to the present invention, the VODSL trunk card unit 200 performs an ADSL modem 101 that performs a modulation or the like to transmit an ADSL packet to a public network. a main processor 102 for providing overall control and data paths of the voDSL trunk card and converting voice frames into the ADSL packets, and a voice processing section 210 for compressing the actual voice signals and performing frame operations.

The voice processing unit 210 removes the CODEC / SLIC circuit which was used for the connection from the conventional IAD to the general telephone and performs an interactive linkage operation between the actual analog signal and the digital processing signal. 222 and DSP 211 that performs operations or transformations on the transmitted digital signal.

The PCM data in the DSP 211 is input to the highway of the keyphone system, and the control signal generated in the DSP is converted into a signal that can be recognized by the keyphone system in the EPLD and supplied.

In other words, there is no CODEC / SLIC circuit that determines and controls the state of the conventional keyphone system, and thus, when the PCM data is transmitted to the highway of the keyphone system, it is possible to determine which channel and which command are the PCM data. The DSP 211 generates a signal and transmits the signal via the highway together with the PCM data.

In the key phone system having a voice digital subscriber line according to an embodiment of the present invention configured as described above, as shown in FIG. 2, the PCM data and the control signal generated by the voice processing unit 210 may be transmitted to the key phone system. By transmitting on the highway, the analog trunk 110 in the conventional keyphone system is removed.

As a result, the number of data conversions is reduced, thereby increasing the call quality and lowering the cost, thereby increasing the competitiveness of the product.

In addition, the key phone system according to the present invention configured as described above is capable of self-switching between the subscribers can be connected to each other in real time with high quality.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

The key phone system having a voice digital subscriber line according to the present invention eliminates the conventional CODEC / SLIC and analog trunks, thereby reducing the number of data conversions, increasing the call quality and lowering the cost, thereby increasing the competitiveness of the product. In addition, subscribers can make their own switching, so that calls between subscribers can be connected in real time with high quality.

Claims (2)

ADSL modem that performs transmission and reception of voice data to the digital subscriber line provided in the keyphone system. The ADSL modem plays a role of modulation for transmitting ADSL packets to the public network, and the overall control and data of the voDSL trunk card. A main processor for providing a path and converting a voice frame into the ADSL packet, and a voice processing unit for compressing an actual voice signal and performing frame operation to generate PCM data, wherein the voice processing unit An erasable programmable logic device (EPLD) for performing bidirectional linkage between the actual analog signal and the digital processing signal; And Key phone system having a voice digital subscriber line having a DSP for performing or modifying a transmitted digital signal. ADSL modem that performs transmission and reception of voice data to the digital subscriber line provided in the keyphone system. The ADSL modem plays a role of modulation for transmitting ADSL packets to the public network, and the overall control and data of the voDSL trunk card. A main processor unit for providing a path and converting a voice frame into the ADSL packet, and a voice processing unit for compressing an actual voice signal and performing frame operation to generate PCM data, wherein the voice processing unit is configured for real analog signal and digital processing. A keyphone system having a voice digital subscriber line having an EPLD for performing bidirectional linkage operations between signals and a DSP for operating or modifying a transmitted digital signal. And the DSP generates a control signal and transmits the control signal to the highway of the keyphone system as the PCM data generated by the voice processing unit to control the keyphone system.