do the Avaya 2420 and sets need to be upgraded if they're going to be used on the IP Office 500 version 7.0? If so what are the advantages and why should they be upgraded
"A phone is a phone and not a computer workstation".
In IPO R7 they need to be on version 6.
The advantage is that they support new features like "visual voice" and there are some audio enhancements.
They should be upgraded if you don't want to go back to that customer fixing something you could have avoided by upgrading the sets.
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