One of the biggest advantages of VoIP is the low-cost. The basic monthly fee is lower than PSTN and the price also includes services such as call display and call forwarding that traditional telephone companies charges extra for. One of the biggest advantages of VoIP is the low-cost. The basic monthly fee is lower than PSTN and the price also includes services such as call display and call forwarding that traditional telephone companies charges extra for.

If you would like to take advantage of the low cost and extra features of VoIP, you may decide to replace your traditional telephone service with a VoIP service. Before cutting the line completely, however, there are a few considerations to keep in mind.

It may not be possible to keep your old telephone number when you switch to a VoIP service. If the service provider offers local phone numbers in your area, there's a chance that you can keep your old phone number, but there is no guarantee. If this is important to you, check with both your telephone company and the VoIP service provider to make sure you keep your old number.

Having reliable 911 service is another consideration. Some VoIP service providers allow you to register your address in case you need to make an emergency call. This information is used to route the call to the correct emergency call center, but once you are connected the operator will not be able to determine your location if you are unable to speak. If emergency 911 services are necessary for you, you are advised to keep your existing phone line or a cell phone for emergency calls