I have a brand new office setup, I have around 15 stations. I currently have 3 unlimited Sipstation trunks but we will be expecting an increase in calls shortly. I was planning on adding an additional sipstation account to make it a total of 4. But I was wondering if I would be able to setup a failover so I dont lose any calls if more calls happen to come in. I was looking at flowroute or something with unlimited channels that charges per the minute. I currently have a flowroute account and have added it to the TRUNKS but I cant seem to receive any calls thru the flowroute after my SIPstation trunks are in use.