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Understanding Phone System Quality of Service
The QoS Concept
Quality of Service refers to network configuration that prioritizes certain traffic types over others. For phone systems, QoS ensures voice packets receive preferential treatment, preventing data applications from degrading call quality during network congestion.
How QoS Works
Network devices examine traffic and assign priority levels based on classification rules. Voice packets receive high-priority labels that ensure they move through network queues ahead of lower-priority data traffic. This prioritization prevents delays that cause choppy audio.
Classification and Marking
QoS begins with traffic classification. Voice traffic is identified by protocol, port, or device type and marked with appropriate priority values. Differentiated Services Code Point markings travel with packets through the network, ensuring consistent treatment across all devices.
Queuing and Scheduling
Network switches and routers use queuing algorithms to manage traffic. Priority queuing places voice packets at the front of transmission queues. Weighted fair queuing ensures data traffic still progresses while voice receives guaranteed bandwidth.
End-to-End QoS
QoS must be configured consistently across the entire network path. A single unconfigured switch can create bottlenecks that defeat prioritization. Network audits verify QoS settings on all devices between phone endpoints.
Conclusion
Quality of Service configuration is essential for business VoIP deployments. By prioritizing voice traffic throughout the network, organizations ensure consistent call quality regardless of data traffic patterns or network congestion levels.
Redstone Systems, Inc. founded in Delaware, USA in December 2002, has been the ODM vendor for many well-known communications companies, serving the Southeast Asian market. In 2020, Redstone Systems will begin to return to the North America market with its self-developed brand.
Redstone has a complete product line of intelligent voice gateways, providing IP-PBXs, analog VoIP gateways (FXS/FXO), digital VoIP gateways (E1/T1), border appliances, and session boundary controllers (SBCs).
With advanced technology in digital signal processor (DSP), speech coding and speech processing, as well as efficient operational tools such as cloud remote management, auto provisioning, Redstone gateways are widely used in markets of enterprise communications, cloud communications, call centers, operators’ IMS/SIP trunks, bringing users friendly, efficient and reliable communication experience.
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