I have snipped a little picture of a bit of flow that I have happening in my office for some telephony logic… Showing you can drag and drop call widgets that help you do things during the life cycle of a call.
In your example you want to activate a phone via: a suitecrm button.
You could achieve such a thing… Lets say you had a sales agent in a different room than you. You could initiate a call between his phone and someone else… 
both peoples phones would ring. haha
Check out twilio… I have just as of today made it so when a call comes in suitecrm is activated and does a search on the callers phone number. all while the phone is ringing… whoo hoo.
If you want you can always check out twilio from this link