Wireshark · Ethereal-users: Re: [Ethereal-users] question regarding VoIP

[Janice Lau <rejoice27@xxxxxxxxx>]

i just want to make sure i didn't misunderstood what you have written..


> If you're sending actual RTP media streams, you can certainly capture
> the packets as they come in.  Analysis of the interpacket timing and
> point-to-point delay could probably be done with some (very) careful set up.
> 
> But Ethereal is not designed for this.  QoV involves some complex
> measurements that go beyond delay and inter-arrival jitter.  Also, the
> endpoints you're using probably incorporate jitter buffers that
> compensate for some of the packet arrival variations (with latency being
> the trade-off).  Ethereal will not be able to account for this.
> 

Do you mean that Ethereal cannot be used to capture the RTP media
streams when the packets come in? Or it doen't help when i want to do
the analysis of the interpacket timing and point-to--point delay?

For the moment, my scope of QoV does not include the MOS
measurement...i just want to find out the delay and inter-arrival
jitter from sending end to the receiving end.

Is it Ethereal not able to capture the voice packets at the instant it
arrives the network card..before it goes through the playout buffer ?

thank you for your help.

Janice