E - Model is a kind of new method for speech quality measurement, in the aspect of network planning and voice monitoring has been widely used, with the rapid development of IP network and application, especially with the gradual application of NGN network, the network can provide including voice, data and multimedia and other business, voice quality measurement is an important aspect of NGN network testing, based on E - Model of speech quality measurement is of NGN network speech quality measure of a kind of effective method, is bound to have a good application prospect,
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