How to update ip office 500 for new firmware 9650, 9611g, 9641G, 9640

[tech0300]

I need to update my Avaya 9650, 9611g, 9641G, 9640

someone has a procedure to do

I have an IP Office 500 V2 (bin 8.1 43)

Excuse my english i use Google translate

Thanks