Apparatus and method for transmitting voice data on ADSL subscriber Board
First Claim
1. An apparatus for transmitting voice data on a Next Generation Network Asymmetric Digital Subscriber Line (ADSL) subscriber board, said apparatus comprising:
- demodulating means responsive to reception of voice and ADSL data for demodulating the received voice and ADSL data, and for synchronizing the demodulated voice data in an ADSL frame signal so as to output the voice data in accordance with a synchronization clock signal provided to said demodulating means;
synchronizing means for synchronizing a Public Switched Telephone Network (PSTN) reference clock and an ADSL Discrete Multi Tone (DMT) data clock to provide the synchronization clock signal to the demodulating means;
data extracting means for extracting the voice data in the ADSL frame data outputted from said demodulating means, and for outputting the extracted voice data and the ADSL frame data; and
switching means for selectively outputting the extracted voice data, outputted by said data extracting means, to the PSTN through a plurality of assigned channels.
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Abstract
An apparatus for transmitting voice data on a Next Generation Network Asymmetric Digital Subscriber Line (ADSL) subscriber board and a method thereof enable a Channelized Voice over xDSL (CVoDSL) function as a voice service function of an ADSL subscriber, stable signaling of the CVoDSL, and synchronization of an ADSL subscriber board and a Public Switched Telephone Network (PSTN) to embody the CVoDSL function. The service to the voice subscriber using an ADSL line can be maintained with the same voice quality as that of an existing copper cable subscriber and the same service can be carried out with less expensive equipment. Also, the need for a splitter to provide services using a separate voice band frequency on the ADSL line can be eliminated, and a plurality of users can be provided with voice services by sharing and dividing a service frequency band on the same line.
44 Citations
17 Claims
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1. An apparatus for transmitting voice data on a Next Generation Network Asymmetric Digital Subscriber Line (ADSL) subscriber board, said apparatus comprising:
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demodulating means responsive to reception of voice and ADSL data for demodulating the received voice and ADSL data, and for synchronizing the demodulated voice data in an ADSL frame signal so as to output the voice data in accordance with a synchronization clock signal provided to said demodulating means;
synchronizing means for synchronizing a Public Switched Telephone Network (PSTN) reference clock and an ADSL Discrete Multi Tone (DMT) data clock to provide the synchronization clock signal to the demodulating means;
data extracting means for extracting the voice data in the ADSL frame data outputted from said demodulating means, and for outputting the extracted voice data and the ADSL frame data; and
switching means for selectively outputting the extracted voice data, outputted by said data extracting means, to the PSTN through a plurality of assigned channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for transmitting voice data on a Next Generation Network Asymmetric Digital Subscriber Line (ADSL) subscriber board, the method comprising the steps of:
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receiving voice and ADSL data;
demodulating the received voice and ADSL data;
synchronizing the demodulated voice data in an ADSL frame signal in accordance with a predetermined synchronizing clock signal;
extracting the synchronized voice data in the ADSL frame signal, and outputting each of the extracted voice data and the ADSL frame data through buses; and
selectively outputting the voice data outputted through the buses to a Public Switched Telephone Network (PSTN) through a plurality of assigned channels. - View Dependent Claims (14, 15, 16, 17)
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Specification