We have hundreds of customers with the Mitel 5000 HX v4.0, v5.0, v5.1, and v6.0 systems. Many opted not to go with Software assurance. We did not really push it because Mitel has done so little with the 5000 over the past several years (1 new feature in 2 years). The 5000 is a very reliable system however we sometimes flash cards becoming defective. There are issues taking an unused 6.0 flash card and downgrading it to a lower revision. It was my understanding it was just a dumb card until the license was attached. Is there another solution besides upgrading all these customers to the v6.0?