What bluetooth serial ports settings for?

While configuring my A2dp stereo headset/handsfree with Lion, i notices that there is an option for editing serial ports for each device. It gives some option to add a profile. Can someone tell me what exactly it is for and how can I use it for my advantage, if any?
Neerav

Well, it seems like I've figured it out. I deleted the pairings (and thus the related serial ports), re-paired (probably not necessary; I probably could've just deleted the serial ports and re-added them), and I haven't had problems since.
It seems that the problems were related to the fact that I renamed the ports to considerably shorter names (i.e. bt-gps instead of PharosiGPS-BT-GPSRFcom-1). I've left both ports with their original names and have had no problems since.
- Mike

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