What part of the world are you located in? The reason I ask is that you previously posted in SwissChocolate’s thread and left the impression you are also using the Medtronic 640G pump. But that pump … and the “Enhanced Enlites” which are used with it … is only available outside of the US.
Below is a quote/link to a post I wrote a few weeks back about dropping the connection between the MiniLink transmitter and a Medtronic pump. Maybe it might speak to what you seem to be wondering about. (Or not).
(Note: The right arrow 
in the upper right hand corner of the quote(s) below is a link which takes you back to the original post which is being quoted.)