we have an Avaya phone system. The front desk has a avaya 6424D+m in the front desk. On the right side of the phone (verticaly) there are buttons that somehow they are configured to dial extentions of the staff. These are kind of like a speed dial buttons. I think they call them Feature buttons. We need to change the extentions on one of those buttons to a new extention. How could I do that.
I read the manual and it does not say anything about it. Thank you,