strange rsync-error

[peter pilsl]

When syncing huge data-folders (~50GB) with a remote server on a daily base I 
frequently (every 2nd to 3rd time) get the following error:

Read from remote host goldfisch.at: Connection timed out
rsync: writefd_unbuffered failed to write 4092 bytes: phase "unknown" 
[generator]: Broken pipe (32)
rsync error: error in rsync protocol data stream (code 12) at io.c(1099)
rsync error: received SIGUSR1 or SIGINT (code 20) at main.c(985)


The connection itself is stable. There might be a small interruption for 1 or 2 
seconds maybe from time to time but nothing unusual.

The rsync-versions are:

on local side:
rsync  version 2.6.6  protocol version 29

on remote side:
rsync  version 2.6.9  protocol version 29



Any idea?

thnx
peter