Abstract
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.
Highlights
Globalization changed the overall business environment where it took away the need for companies, suppliers, and customers to be in the same country
Will the changes in differentiated services code point (DSCP) markings for the voice traffic have an impact on calls that originate from Voice over Internet Protocol (VoIP) networks and terminate in system 7 (SS7) networks? Second, will the changes in DSCP markings for the voice traffic have an impact on calls that originate from SS7 networks and terminate in VoIP networks?
This study found that the higher VoIP traffic’s DSCP marking value assignment, the less the chances of higher latency or packet loss in the VoIP traffic
Summary
Globalization changed the overall business environment where it took away the need for companies, suppliers, and customers to be in the same country. For voice traffic to travel in HFC broadband network, the analog voice signal gets converted into digital signals. Additional hardware such as routers, switches, and servers are needed to transport the initiated voice traffic to its destination. IP broadband networks allow for the combination of voice, data, and video to travel over one single communication link. VoIP traffic shares the same links with video and data traffic when it travels through the different network devices including the routers and switches. DSCP markings may allow HFC broadband network carriers to prioritize their traffic. If the carriers can to mark the different types of traffic across the various devices in their networks, VoIP’s quality might improve. This research focuses primarily on assessing the impact of DSCP markings on VoIP traffic
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