We're considering getting an expansion card for our PBX. Right now we have 120 ports total and seven open ones for new extensions. With a high likelihood of expanding and taking over the neighboring office, we're going to need more ports. What are the drawbacks of the expansion card? I know that ACD functionality would be lost on the ports on the Expansion card. I'm hearing conflicting information on VM softkeys. Also quick transfer to VM would not work. Anything else? Anybody use one? Any thoughts on the subject? Alternatives?