How to tar a local directory to a remote tar file: 
tar cvzj - /your_local_dir | ssh root@192.168.2.1 "dd of=/backup/local_dir.tar.bz2"
How to restore a remote tar to a local file sistem: 
cd /
ssh root@192.168.2.1 "cat /backup/local_dir.tar.bz2" | tar zxvj -