How much bandwidth does iChat audio chat use?

I have a friend who has a broadband connection via a 3G/Edge cell phone connection in Europe. She has to pay for bandwidth in chunks of 500mb. Anyone have any idea how much bandwidth audio chat uses on an hourly basis.

It's complicated by how much data you can send in Video with Audio or Audio only or text chat and by what rate then can accept it.
iChat normally sends Audio chats at about 25kbps up to about 48kbps
After that is a question of ding the math.
This will give the rate that is th Max. What you will not know is how much of that is actually data measured as Download over the service.
10:38 PM Thursday; August 14, 2008

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