How can I tell the difference between a transferred call to my extension and someone calling in from the queue?

There are 4 of us working in the call queue and we often have to transfer to one another as well as to other extensions. Is there a way for me to drop the call into an extension that will show the person that it's a transferred call with someone else on the line vs. just me calling? I want our employees to know if there's a customer on the other line waiting or if it's just another co-worker calling them.