1. Kazemitabar H et al (2020) A comprehensive review on VoIP over wireless LAN networks. Comput Sci Lett 2:1–16
2. “The E-Model, R Factor and MOS, Overview (2019) http://www.sageinst.com/downloads/960B/EModel_wp.pdf
3. Rosenberg et al (2016) SIP: session initiation protocol. RFC 3261. RFC 3261, IETF
4. Rathore PS, Chaudhary A, Singh B (2013) Route planning via facilities in time dependent network. In: 2013 IEEE conference on information & communication technologies, Thuckalay, Tamil Nadu, India, pp 652–655. https://doi.org/10.1109/CICT.2013.6558175
5. Bernex E, Gatineau A (2015) Quality of service in VoIP environments. White Paper. www.neotip.com