Articles by Mark A. Miller 

Do You Hear What I Hear?�Part V: Integrated Services

This mother of all QoS solutions tracks flows, schedules packets, and generally manages network resources to ensure adequate bandwidth for the services running at any given time.

Do You Hear What I Hear?�Part IV: Measuring "Toll Quality"

Vendors of VoIP systems often refer to "toll quality" as a lofty performance standard to which their products adhere. Is this a term with precise meaning? Yes and no.

Do You Hear What I Hear?�Part III: Dealing with Latency

Latency and echo are inevitable in VoIP, but they can be compensated for. Engineering constructs such as the 'delay budget' help keep these problems under control.

Do You Hear What I Hear?�Part II: Defining Key Transmission Impairments

Due to its connectionless architecture, an IP network creates its own built-in obstacles to the smooth transmission of sequential data such as voice and video.

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