No but knowing
what 2600 & KP1-4 does. Also knowing that the internal
system still works that way does. :-)
What third world country are you living in? Switch to switch routing has
been digital in the US for years now. Does SS7 ring a bell?
ESS? Ewwwwww. :) I'd much rather have a step by step or crossbar switch
to play with. :)
g.