The Quality of Service (QoS) parameters such as delay, jitter, throughput and packet loss be used to measure the quality of the network. Voice over Internet Protocol (VoIP) is a technology that makes internet media to be able to conduct voice communication remotely directly. Voice over Internet Protocol (VoIP) is a technology that is capable of passing voice, video and data traffic in packages through an IP network IP.

Papers:

Deployment of VoIP Technology: QoS Concerns: https://arxiv.org/ftp/arxiv/papers/1312/1312.2581.pdf

A Detail Review on Voice over Internet Protocol (VoIP): http://www.ijettjournal.org/2015/volume-23/number-4/IJETT-V23P232.pdf