[Icecast] big buffer on server-side

[Balint Jacint]

Hi,

I'm planning to broadcast live stream from a place, where there's only 
ADSL connection, which may be used during broadcast, so temporary 
bandwidth-sortage can happen.
Is there any way to create a huge buffer on server-side? This way there 
would be no problem, if the source couldn't send the stream, the server 
could serve from the buffer until the source gets bandwidth again.
It could be any big, I actually want 2-5 minutes buffer on the server. 
Latency is not an issue, noone cares (in this situation).

Thanks in advance,
Jacint