Mobility

Determination of More Realistic Target 95% Values of Post Selection Delay in Modern Telephone Networks

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Executive Summary

Besides the quality of speech signal, the telephone network response time is the main indicator of Quality of Service (QoS). The telephone network response time is expressed by the time needed for some phases of telephone connection set-up and disconnect. Post Selection Delay (PSD, or Post Dialing Delay) is the key indicator of connection set-up response time because of two reasons. In this paper, the authors present the telephone network and the recommendations, dealing with the greatest target values of Post Selection Delay. It is shown that the Post Selection Delay is the sum of the delays between the network nodes and that it has the smaller dispersion than the one, recommended as the greatest in the recommendations.

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