Hosted IP PBX service or digital phone service can help with business continuity. When a major catastrophic event happens or equipment failure occurs, a business continuity plan must be in place. Often, traditional phone lines fail. When these phone lines fail, a digital phone may continue to work if the Internet is still operable. Even if one server fails with digital phone service, there is usually more than one server to ensure that phone lines are always available. Having both types of phone lines can aid with disaster recovery.