Measurement and Test Performance for Integrated Digital Loop Carrier for White Noise Impairment Using Interleaved Mode

ABSTRACT This paper presents results of measurement and test performance for integrated digital loop carrier (IDLC) technology. The study focuses on cable modem termination systems (CMTSs) that are reported on assortments of operating parameters to the end user based on upstream and downstream modes that are incorporated with statistical analysis approach. The study focuses on the statistical analytical measurement for noise margins on a particular type of loops--white noise Keywords: integrated digital loop carrier, DSL, broadband, interleaved mode INTRODUCTION Service providers in the past have extensively used digital loop carriers (DLC) in delivering reliable, robust and high quality voice service to end users. Recently, telecommunications network providers (TNP) improve and change their path in broadband technologies for better services and costs reduction to customers. As a result, they increased the number of lines with extended distances from Central Office (CO) with high quality of services in voice and data. From analog technology in plain old telephone services (POTs) to digital in DLC, TNP have made great stride and break through to service providers and end-users. Digital loop carrier (DLC) technology is based on digital techniques to provide large services to users via copper lines. In today technologies, IDLC systems are broadly installed in delivering telecommunications services. Significant wiring and advantages of cost can be profited with IDLC at remote locations. In this work, the study illustrates the statistical analysis for the results of measurement of a test performance for integrated digital loop carrier (IDLC) type of white noise impairment. This paper is arranged as follows: A review of literature provides an overview of voice over digital subscriber line (VoDSL), digital subscriber line (DSL), and carrier serving area (CSA). A description of the DLC and IDLC are then presented, with a discussion and network setup following. Regression analysis is then presented, with statistical analysis and hypothesis testing on the difference between the two means, of the noise margin, of the upstream and downstream cases in the interleaved mode setup completing the section. The paper is completed with a summary of the results and the conclusion. LITERATURE REVIEW Early studies showed that the first generation integrated access systems served as a platform for delivering voice, data and voice services over multiple T1/E1 lines and OC-3 fiber link. Later studies showed that the universal digital loop carrier system (UDLC), evolved into what are now known as the integrated digital loop carrier (Opara & Etnyre, 2010) Musa, Akujuobi, & Mir (2007) indicated that when measuring call quality, three categories of study include listening quality, conversational quality and transmission quality. According to Musa et al., the objective of call quality measurement is to obtain a reliable estimate of one or more within the above categories using either subjective or objective testing methods. A baseline test for the listening quality (LQ) using voice over digital subscriber line (VoDSL) access technology has been studied (Musa, Opara, Shayib, & El-Aasser, 2010). Researchers used voice/listening quality (V/LQ) transmission with voice compression while continuously downloading files. Indeed, those results enable the efficiency of the LQ and its statistical analysis based on a digital subscriber line (DSL) service at level 1.5M/384K for each American National Standards Institute (ANSI) and carrier serving area (CSA) loops. Furthermore, based on the experimental VoDSL network architecture and the following DSL service levels 640K/ 640K, 1.5M / 384K, 3.0M/ 512K, and 1.5M/ 256K for each ANSI/CSA loops by using voice quality transmission testing with voice compression while continuously downloading files, it was found that on certain loops, all eight derived lines were not supported on IADs for VoDSL solution (Musa et al. …