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New Member

RTP drift with SPA8000 using G.729

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?

Thanks,

Faruk

2 REPLIES

RTP drift with SPA8000 using G.729

What is the firmware version loaded on SPA8000?

G.729 is more CPU intensive of G.711. What happens if you select G.711?

Regards.

New Member

RTP drift with SPA8000 using G.729

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.

Thanks.

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