Hi every one , we are using 3cx in our company head office , and now we are about linking some of our branches to the Main Office . So the Question is : what is the Best for a branch with 25 Ext : its own 3cx server to be lincked with the main Server . or SBC at the branch + Failover Server at the main Office . * Current 3cx Server is on windows 7 virtual machine , 3cx tunnel Service need to be restarted every week or so . " any advice will be appreciated ".