BROADBAND ACCESS EVOLUTION NETWORK TECHNOLOGY TEST FOR THE EFFICIENCY OF LISTENING QUALITY.pdf

BROADBAND ACCESS EVOLUTION NETWORK TECHNOLOGY TEST FOR THE EFFICIENCY OF LISTENING QUALITY USING VoDSL Sarhan M. Musa Department of Engineering Technology Prairie view A M University, Prairie View, TX 77446 USA Abstract This paper presents a baseline test for the listening quality (LQ) using voice over digital subscriber line (VoDSL) access technology by using voice/listening quality(V/LQ) transmission with voice compression while countinously downloading file. The design of an experimental VoDSL network architecture is presented. We identify the efficiency of the LQ based on the following digital subscriber line (DSL) service levels, 640K/640K, 1.5M/384K, and 3.0M/512K for each American National Standards Institute (ANSI) loops. Key Words Voice over Digital Subscriber Line (VoDSL); Digital Subscriber Line (DSL); Integrated Access Devices (IAD); Listening Quality (LQ). 1. Introduction The next generations of telecommunications providers around the globe are engaging in the rapid development of a new service that will combine both data communications and telephony. VoDSL has been developed with the rapid increase of the Internet and of the data traffic through network convergence of voice and data [1]. VoDSL service has the capability to provide the customers with converged voice and data, including local and long distance telephone service, plus high speed Internet access, on a single DSL copper line. The tests and the requirements demonstrated of VoDSL equipment for voice functionality and voice quality (VQ) in the DSL forum technical report are in [2]. We used on our test asymmetric digital subscriber lines (ADSL), because it provides a “life-line” capability, so that if the power fails, one telephone line will still work. It has a lower bandwidth upstream than downstream. It transmits high bit rate data in the down direction from the central office (CO) to the subscriber (downstream), with typical bit