Nothing is more satisfying than watching a customer get punished by showing their disloyalty by dumping your great service over the years for the promise of a super "IP phone system". Like Cisco. In every case so far the company has been miserable with their decision. One account we lost downtown - a large auto dealer - bought Cisco and the installing firm never has got it right. When you call them at night it answers with 'Thank you for calling' about 30x times then hangs up. Guess they got their 140k worth LOL. Their old Samsung key system at least worked right.