This is a review for Yay's excellent pre sales support. From the moment I made an enquiry I have been very well looked after first by Raul and then Jez. Jez especially spent a couple of hours on the phone painstakingly setting up the call routing to my rather exacting standards. Their enterprise level exchange can pretty much do anything you could need it to. I was so impressed I signed up immediately and we are now in the process of transferring my numbers over to the system. I will come back and update this review once I have had a chance to use the system live for a while.