How to see pressed key number while in the call

I am trying to find out if there is any way to show pressed keys during a call session on the phone. I noticed that this option is not available on any cisco 79xx , polycom 501 or even X-lite…

I have phones installed in a medical office and when they are calling insurance reps they have to go through lots of prompts and since non of the sip phone shows the pressed key there is no tracking…

I am using cisco 7960 and 7940 with asterisk. Is there any changes needs to be done on the asterisk side or its the phone… i just want want to see the pressed key after the call is established with astersik…

PLEASE HELP