You are licensed for 128 basic ports and it seems that you have reached that limit. The used column will be blank because you don't have a release 4 or higher processor. The BEXU won't help you here unless you go past two cabinets. My suggestion is to count all the ports that are programmed in the system which includes PDKU, analog RSTU/BSTU, PRI b-channels, and IP ports either station and/or trunk on the LIPU. You should have counted 128 ports. Then find out which ones are not in use and delete them. That will free up ports for you. If there's still not enough ports for you then you'll have to add more to the processor which I believe you can still purchase licenses via a dealer. If not, PM me and I'll try to help you out.