I have been in the Telecom industry a long time, primarily Nortel, and if you know nortel, you know its hard to configure. After purchasing Avaya for my new company, never logged in to a system, I picked up a few books and within a week i had h323, 9611, phones up and working. was able to create a sip trunk via system manager and session manager to our existing PBX, and it all worked! not to mention the whole thing being virtualized, the documents are spot on if you just do some digging to find them. I needed 0 help from the vendor, saving us possibly thousands of dollars!