How to see whos on the phone when a call comes in?

#1

I would like to setup my extensions on a GXP2170 to show who is on the phone while a call is ringing in. If there is no call coming in I can already see the extension as solid red but when a new call comes in it will start blinking like the rest. Is there a way to set this up so they stay solid so we know who is already on a call?

#2
#3

While I may be wrong, my guess is that it depends on whether or not the extension in question is set for call waiting. If set to call waiting enabled, it will likely show the extension ringing which will give others, if needed, to pick the call up.