Personally on dial-up I have my settings to Ask when an update is available, that pops up a notification box (bottom right of the screen) and if it is inconvenient I click the box to download the update. Otherwise I ignore it and the box goes after a few seconds and I do a manual update when it is convenient. This way because I have been notified in this manner I don't get the audible update notification.
I'm not sure what form of satellite connection you have, some have a normal dial-up up-line connection and then the data is downloaded by satellite, because of that I don't know if your Program Settings, Update (Connections) should be set to always connected or dial-up. If the up-line connection is by landline I would have thought leaving it set to dial-up, if it is satellite up-line and down-line (unusual, expensive) then set to always connected.
Can you tell me what is Push iAVS and is the box supposed to be x'd?
Sorry missed this before, it is a means of pushing a VPS (what used to be called iAVS), you receive an email notification that an update is available and the program grabs it.
If you tick enable you will then need to Register, giving your email details, etc. However, you don't have to worry about this as it is only available with the Pro version. Try to tick the box and you will see the notification it is a pro function.