Sounds technical, doesn't it?

A "packet relay server" is nothing more than a way of "bouncing" an
Internet connection from one endpoint to another. Think of it as
the telephone operator in those old-fashioned switchboard-style
telephone companies: a telephone user would call the operator,
ask for a connection to another telephone user, and the operator
would plug in some wires to make the connection. In this model, the
operator is acting as a "packet-relay server".

We call our packet relay server an echoServer, as the connection
effect (ie, bouncing one connection to another) can also be thought of
like an "echo". Well, we thought so.