On Thu, 12 May 2005 23:16:39 +0100, "Ian" <spam"AT"bathfordhill.co.uk> wrote: > >What I mean is you need at least 128K upload but preferably 256K as with jst >a upload speed of 64K you will not get a decent voip service. >This is because if you call a user who only supports G711 and you only >support GSM your call will fail as you cannot negotiate similar codecs. I am calling people who use a standard telephone. Neither they nor I have the faintest idea what "codec" they are using. Surely there must be a SIMPLE explanation somewhere on what all this "codec" business is when talking about VoIP? I don't need a full blown technical explanation - just briefly what it means, why there are so many versions and how do I use the information in practice. >So basicly accept the fact that If you are serious about using VoIP you will >have to upgrade to get an acceptable bandwidth. I would like to know about "codec" first. Right now it is just a set of characters which people around here keep using without explaining exactly what it means and how to use it.