Voice over Internet Protocol (VoIP) has delivered some beneficial features and cost savings. One of the most used features is the ability to move your phone from the office to your home or other off site location. You must always be cognizant of your emergency services information because when you move a phone and someone uses that phone to call 911, emergency services could be dispatched to the wrong location.
For example, you take your phone home and pass out while in your home office. Someone in your household finds you and calls 911 using your office phone. If it is still registered with your office and the person that calls does not tell emergency dispatch your address then the much needed help could be sent to your office instead of your home.
Make sure to let your service provider know when you relocate a phone off site to make sure this does not happen. Better safe than sorry!