Three major factors that can affect Voice over Internet Protocol (VoIP) phone services' quality, these include packet delay, packet loss, and jitter. The focus of this study is specific to the VoIP phone services offered to customers by cable companies that utilize broadband hybrid fiber coaxial (HFC) networks. HFC networks typically carry three types of traffic that include voice, data, and video. Unlike data and video, some delays or packet loss can result in a noticeable degraded impact on a VoIP's phone conversation. We will examine various differentiated services code point (DSCP) marking, then analyze and assess their impact on VoIP's quality of service (QoS). This study mimics the production environment. It examines the relationship between specific DSCP marking's configuration. This research avoids automated test calls and rather focuses on human made call testing. This study relies on users' experience and the captured data to support this research's findings.
Various factors can have a significant degrading impact on the residential Voice over Internet Protocol (VoIP) phone services' quality. Hybrid fibre-coaxial (HFC) networks typically carry three types of traffic that include voice, data, and video. Unlike data and video, some delays or packet loss can result in a noticeable degraded impact on a VoIP's phone conversation. This paper will analyze and assess VoIP traffic prioritization and its impact on VoIP's quality of service (QoS) based on the concept of differentiated services code point (DSCP) markings. Call testing examines two types of calls. The first set of tests focus on calls that originate from a VoIP network and terminate on a signalling system 7 (SS7) network. The second experiment focuses on calls that originate from SS7 network and terminate on a VoIP network. The research results provide DSCP markings configurations that can improve phone conversations' quality.
Various factors can have a significant degrading impact on the residential Voice over Internet Protocol (VoIP) phone services' quality. Hybrid fibre-coaxial (HFC) networks typically carry three types of traffic that include voice, data, and video. Unlike data and video, some delays or packet loss can result in a noticeable degraded impact on a VoIP's phone conversation. This paper will analyze and assess VoIP traffic prioritization and its impact on VoIP's quality of service (QoS) based on the concept of differentiated services code point (DSCP) markings. Call testing examines two types of calls. The first set of tests focus on calls that originate from a VoIP network and terminate on a signalling system 7 (SS7) network. The second experiment focuses on calls that originate from SS7 network and terminate on a VoIP network. The research results provide DSCP markings configurations that can improve phone conversations' quality.
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