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E911

In this article

E911 (Enhanced 911) refers to the implementation of emergency calling services that are compliant with the same principles as traditional E911 but adapted for VoIP systems. VoIP E911 ensures that when a person makes an emergency call using a VoIP service, such as a VoIP phone or softphone application, their location information is accurately and promptly transmitted to the appropriate emergency response center.

Here’s how E911 works in the VoIP context:

  1. Location Information: When a user registers with a VoIP service, they are typically required to provide their physical address. This address is associated with their VoIP phone number and stored in a database, often referred to as a “Customer Information Database” (CIDB).
  1. Emergency Call: When a user dials 911 using their VoIP device, the VoIP service provider uses the registered address associated with that user’s phone number to determine their location. This location information is sent along with the call to the appropriate Public Safety Answering Point (PSAP), which is the emergency dispatch center responsible for the caller’s area.
  1. Routing: The VoIP service provider routes the emergency call to the appropriate PSAP based on the caller’s registered address.
  1. Dispatch: The PSAP receives the call along with the caller’s location information and dispatches the appropriate emergency responders (e.g., police, fire, or medical services) to the provided location.
  1. Callback: If the call is disconnected or information is incomplete, the PSAP can call the user back using the registered callback number to confirm the situation and location.
  1. Location Updates: Users are typically required to update their registered address with the VoIP service provider whenever they change their physical location (e.g., when they move to a new residence or travel with their VoIP device). This ensures that accurate location information is available during emergency calls.

E911 for VoIP is a critical safety feature because, unlike traditional landlines, VoIP phones are not inherently tied to a specific physical location. Users can take their VoIP devices with them anywhere they have an internet connection, which makes it essential to maintain up-to-date location information to ensure timely and accurate emergency response.

E911 regulations and requirements for VoIP providers vary by country and jurisdiction, but compliance is typically mandated to ensure public safety. VoIP service providers are responsible for implementing E911 features and educating their users about the importance of keeping their address information current to ensure the effectiveness of emergency services in VoIP environments.

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