I have a customer that is using SPA8000 device. We are noticing major RTP drift into the future in the stream coming from the device, something to the order of 1 second a minute. By the end of a 5 minute conversation the timestamp in RTP G.729 packet is almost 6 seconds into the future. Anyone else noticing this behaviour?
Customer does not want to switch to G.711 due to bandwidth requirements. I am not sure what firmware they are running, I assume the latest one (which is not that new time wise) as these got deployed recently, will inquire.
2% drift into the future seems excessive, most oscillators are within +-0.1%.
I am curious as to why would CPU load matter in this case. To me it is more likely that the clocking used is not precise enough for real time applications.
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