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Voice transmission over PC network


Abdul Rashid, Zainal Abidin and Ismail, Mahamod and Mohd Ali, Borhanuddin (1990) Voice transmission over PC network. In: The International Conference on IT, 1990, Kuala Lumpur. .

Abstract / Synopsis

With the merger of telecommunication and computer technologies, voice transmission over computer networks has now become possible. This paper describes two types of voice communication over PC networks; a single point-to-point link, using store and forward concept (delayed message technique) for developing voice mail system, and a voice/data integration over Ethernet Local Area Network (LAN). Voice signal sampled from telephone handset is digitized and coded to 4-bit ADPCM codeword by the codec which is interfaced to the PC. In the voice mail example, the digitized data is stored in the PC and subsequently transmitted over a simple point-to-point link to a remote PC. In the second example, the voice data is immediately transmitted via a buffer to the destination station, using Carrier Sense Multiple Access with Collision Detection (CSMA/CD) medium access protocol. A corresponding codec at the receiver end will decode the digitized voice and convert back to analog signal before being played out on the telephone earpiece.

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Additional Metadata

Item Type: Conference or Workshop Item (Paper)
Subject: Voice mail systems.
Subject: Packet switching (Data transmission).
Subject: Computer networks.
Divisions: Faculty of Engineering
Keywords: Voice transmission; PC networks
Depositing User: Samsida Samsudin
Date Deposited: 04 Jul 2012 19:22
Last Modified: 08 Sep 2016 10:54
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