network audit tools

Network audit tools determine the size of samples contained within a single packet. Assuming a 20-ms (default) packetization interval, the loss of two or more consecutive packets results in a noticeable degradation of voice quality. Therefore, assuming a random distribution of drops within a single voice flow, a drop rate of 1 percent in a voice stream would result in a loss that could not be concealed every 3 minutes, on average. A 0.25 percent drop rate would result in a loss that could not be concealed once every 53 minutes, on average

Low-bit-rate, frame-based codecs, such as G.729 and G.723, use more sophisticated PLC techniques that can conceal up to 30 to 40 ms of loss with "tolerable" quality when the network audit tools used for the interpolation is still relevant