You can also do this from ASA, while logged in via GEDI or emulation. Do a display st xxxx or ch st xxxx, and apply the feature that you want to activate on the phone. Make sure you know the numeric button position of that feature. IE, 1-8, or 1-16 depending on the set type. Do a list trace st xxxx/x (where x is the sum of: 6 + numeric button value from above). It will activate the corresponding feature on that phone. Very handy if you're in a pinch and need to get something done quickly.