We had SSU and now SA mainteance for our systems. I'm hearing from an Avaya BP that this is only good for upgrades within the same version (so like version 6.3 to 6.4 to g.5...etc) But that once you go to 7, you pay for the software upgrade... Is this true? Since Avaya skips releases then how would this benefit anyone? Please advise what you've experienced. Thanks!