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Understanding Phone System Bandwidth Calculations
Why Bandwidth Calculations Matter
Implementing VoIP without adequate bandwidth results in poor call quality and dropped connections. Accurate bandwidth calculations ensure networks support concurrent calls while leaving capacity for data applications.
Codec Bandwidth Requirements
Different voice codecs consume different bandwidth amounts. Common codecs like G.711 use approximately 87 kilobits per second per call including overhead. Compressed codecs like G.729 reduce this to around 31 kilobits per second. Codec selection balances quality against bandwidth.
Concurrent Call Planning
Bandwidth requirements equal per-call consumption multiplied by maximum concurrent calls. Organizations should plan for peak usage rather than average. Adding headroom for unexpected spikes prevents quality degradation during busy periods.
Network Overhead Considerations
Beyond voice payload, protocols add overhead for signaling, headers, and control traffic. Total bandwidth planning should include approximately 20 percent overhead above calculated voice requirements. Quality of service configuration ensures voice receives priority treatment.
Conclusion
Accurate bandwidth calculations are essential for successful VoIP deployment. By understanding codec requirements, planning for concurrent calls, and including network overhead, organizations ensure their networks deliver reliable, high-quality voice communication.
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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