The deployment of a VoWLAN solution can provide substantial benefits to companies. In most cases, the primary benefits are increases in productivity due to improved communications and lower long-distance telephone charges. A doctor in a hospital who carries a VoIP phone is reachable immediately and can respond to patient needs quickly. Also, a company can make use of VoWLANs and route calls over the Internet or a private WAN, which makes these calls much less expensive than using the traditional PSTN. In addition, a VoWLAN solution is a lower-cost method for implementing mobile phone technology inside larger facilities as compared to cellular systems. A company should, however, complete a financial study to adequately define benefits and the costs of deploying and supporting the VoWLAN system.