Yealink Expansion Module

[hjones0720]

We have yealink set up at our receptionist desk with the expansion module attached. We have all extensions all set up and they have been working great! Our phones are T43U's. My question is how can we see if when someone is on the line when we try to transfer to their extension? (so have the line lit up when that extension is in use)

[jvogt]

Do you have all the buttons setup as BLF's