Old Grey Geek:

Bung: Only analogue on the local copper, for last 20 years most exchanges and trunks between exchanges in NZ have been digital. But we all knew this :-)

I think we were talking about local calls

Fractul: Also the speed of light, the speed of any electromagnetic propogation, varies substantially by medium.

"The speed of a charged particle in copper is very slow: about 0.01 cm/s.

At this rate, it takes about 3 hours for a charge to travel about one

meter. The electric field (signal) travels at the speed of light through

copper. The charge is not carrying the information, per se, but the

information is transmitted by the electric field. It is like a molecule of

water does not travel across the ocean, but the wave does."

from: http://www.newton.dep.anl.gov/askasci/phy99/phy99488.htm



But then there are arguments about this as there is about everything it seems.

Fractul: Regarding the digital tv, thats because it goes through another encoding process true but also involves usually several intermediate transmission points and the extra distance involved. If your analog signal had to propogate down a very wiggley wire for up to space for satellite transmission instead of the straight parth transmission from a terrestrial transmitter you would be able to measure the extra latency also.

What I meant was; 2 TV's in one room, same, analogue, signal. The delay you will notice, in the audio, is soley due to the DSP. And, the losses on your wiggley wire would be so much you would be waiting till way past bedtime before you gave up.



So there NAH x 5

;-)