QOS MEASUREMENT AND EVALUATION IN PRIVATE NETWORK OF SPP PRIOR TO VOIP IMPLEMENTATION

Voice over Internet Protocol (VoIP) has many advantages for enterprises, chief of which its cost-effectiveness. However, to compete with traditional telecommunications technologies, the quality of speech over a VoIP connection must be comparable to or better than that of the Public Switched Telephone Network (PSTN). Enterprises must perform a full network assessment to discover all network impacts prior to the IP telephony deployment. This will help avoid service problems, unplanned additional costs and deployment delays of IP telephony implementations. Several objective testing methods are available to measure, monitor and analyse the speech quality of VoIP services. These include Perceptual Speech Quality Measure (PSQM). This article explains the technical principles of these methodologies, shows how they are applied in network assessment in private network prior to the IP telephony deployment by the Siemens network engineering and routing tool. This assessment verified that the solution is capable of delivering acceptable voice quality across the network from end points within all important office locations.