Abstract
Voice over Internet Protocol (VoIP) technology is easy to find even almost all instant messaging mobile applications already have features such as voice calls. The VoIP feature can only be used after the user is connected to the internet network, for the average smartphone user to use the internet network provided by the internet service provider (ISP). The VoIP is very dependent on the network used. Quality of Service (QoS) parameters such as delay, jitter, throughput and packet loss be used to measure the quality of the network. This study aims to analyze the performance of VoIP technology in one of the instant messaging mobile applications like WhatsApp uses Telkomsel ISP network and be adapted to International Telecommunication Union (ITU-T G.114) standards. Results of the research, the highest of delay generated by voice calls during indoor conditions is 56,6 ms, jitter is the most resulted voice call when the indoor condition is 0,5 ms, packet loss is the most generated voice call when the indoor condition is 7%. The resulting throughput in the voice call testing process is between 25.2 Mbps until 28.1 Mbps.
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