This paper presents an economic analysis for alternatives of the building telecommunications cabling system to accommodate multimedia services. Four alternatives are developed with respect to capacities of the building telecommunications cabling systems. Economic analysis includes qualitative analysis as well as quantitative one and the results of those analyses are incorporated with AHP(analytic hierarchical process) method. In analyzing the alternatives, based on the possible growth of multimedia traffic and evolution of access networks, various scenarios are considered. The results suggest not only the most competitive alternative but also the conditions for each alternative to gain the competitive edge.