Then it must have been Skype un-common VoIP. However, at least within Britain it seems typical of the quality I get.
Telecommunications Echo is a hardline physical manifestation due to impedance irregularities. See Time Domain Reflectometry (TDR). Once the signal is digitized the concept of echo mutates wildly. Actually, the concept of irregular delay is more appropriate.
Your post is an amateurish explanation for echo.
Most increased, telco long haul, echo is caused by their having changed over to fiber transmission, which has greater delay than microwave and wire-line transmission. In private networks, and most non-telco voip, the low bit-rate coding processes introduce noticeable delay all by itself.
Don
The only echo I have noticed has been when I've called the US, most notably California (6000 miles).
Mere delay itself is not echo. Echo, in whatever form, always includes some form / fraction of the original signal being returned to its source. There are plenty of other disturbances in wireless communication to tangle up a signal. Digital signals on fiber do not experience any equivalent kind of echo to what we get acoustically in say canyons.
(snip)
That's really good to know.
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