Does syncing only use desktop internet connection?

Question

I have  6.1 windows XP on my Palm treo pro. When syncing I wondered whether it uses my mobiles internet connection as well as my desktops internet connection. When reading about syncing it implies that only the desktop is being used. Can I confim this is the case so I am not paying for useage on my mobile.
Also I keep setting my data connection from the comm manager OFF but it comes back on if I accidentally connect to an internet page. I think I was advised that a choice should be given by my phone as to whether I wanted to connect or not. Instead it connects to the internet automatically. Then when you go to the comm manager it shows the data connection has switched back ON again of course. I wanted to stop my phone connecting initially and be given the choice if I wanted to connect. If I cannot do this then is there a setting that will at least stop the connection to the net. I have looked through all the phone help menus for my palm treo pro and cannot find how its done?
Thanks very much.
Post relates to: Treo Pro T850U (Unlocked)

Answer 1

Thanks Jeffro thats seems like a great idea. I decided to look for a different option before using your method. I seem to have got into more of a pickle unbelivabley. I did manage to disable the internet but cannot work out how on earth to re-enable it now.  I did the following to stop the orange network connection. I went first into setting>connections>set up my proxy>modem. This shows NAME and underneath -ORANGE network . I pressed and held the touch screen over the word ORANGE to access the short cut. It gave an option to add or delete. In my lack of wisdom I decided to delete this. It stopped the internet but there seems no way to re-enable back to orange which I'd assumed you could do. I of course prefer your idea from the comm manager settings given it could then be re-enabled in theory.  I started  by  re-enabling the data connection which said ON but gives no net connection now since deleting Orange as explained above. So I cannot now try Jeffro's idea in above's post.  Does anyone have a treo pro to help me out on this to re-enable the orange internet? . Its turing into a Nightmare!  hope someone can help. Shall I contact orange or palm maybe? I don't think palm support the treo pro though as its an older phone, may be they do still? Can orange re-enable my phone from there end without me manually correcting something in my phone settings?
I apologise for all the questions seems everything is going pear shaped. Does anyone use the TREO PRO if so can they take pity on my post and help - thanks!! and thanks Jeffro for the help so far.
By the way I found this other post from 2008 for when I do eventually, somehow? , get my connection back. I think this is what Jeffro was saying and i will eventually implement when back on the net -
http://forums.palm.com/t5/Bluetooth-WiFi/Disabling-data-connection-to-3G-and-GPRS/td-p/192645