Nortel PVQM was developed by nortel network for network management personnel guarantee the quality of IP telephone voice deployment tools, to provide users with fault handling, for the user to solve the network performance degradation and breakdown provides powerful means, nortel PVMQ end-user voice quality in real-time detection, can find problems of IP phone terminal, real-time active voice quality management, the data network jitter, packet loss and delay as well as the parameters of the buffer, the data volume, sudden voice quality parameters, such as management tools can carry on the real-time monitor to the network and the end user, assess the end-user MOS value and R value, before network and terminal without problems, find problems and solve the problem, to meet the needs of enterprises for VoIP,
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