Ethereal troubles

[alecos]

During my thesis regarding VoIP I did some experimental work with Ethereal and a problem occured as follows:

I analyzed with three different Laptops a group of traces of Ethereal and I
found, that each equipment report deliver different information. I implemented a
one way VoIP connection with the help of one call generator, which delivered
clean signals. This implementation has the reason to determine the influences of
the measurement equipment in voice quality reports.

When I imported the captured files of Ethereal to a call analyze tool, I
observed presence of jitter and packet loss. The question is why there are
presence of jitter and packet loss?

I know that Ethereal needs a big memory space. Because of that I give you the
information of the equipment:

Laptop 1 : Fujitsu Siemens COmputers (Hardware: Pentium 4, processor 1,7
GHz, RAM 512 MB - Software: Windows 2000)

Laptop 2 : Gericom (Hardware: Pentium 4, processor 1,4 GHz, RAM 224 MB -
Software Windows XP)

Laptop 3 : IBM Think Pad (Hardware: Celeron, processor 1,4 GHZ, RAM 504 -
Software Red Hat)

I would be grateful if you can give me an answer of my question.

Thanks

 

[nweaver]

why would you get jitter and packet loss? Because it's network, that's part of it. You shouldn't have a lot (depending on the setup) but you will have some. It's like asking why you get tire noise when you drive your car down the road.