that's good on the phone (6600)
You have a KSU (key service unit) that runs the phones, we need to know what model that is. There are about 3 or 4 different Executech systems and they all program just a little different. Don't want to give you the wrong program, it will just frustrate ya.
Now go look on that tag, the ksu is probably in a phone closet somewhere in your office or building.
we'll also need to know what ext. # the phone is (intercom #) that needs programmed, so we program the correct phone/