www.TechnicalPDF.com husband was hospitalized and many family members and friends called asking for updates on the patient's condition. The customer was charged $60 extra for the additional calls. DPI lets carriers track subscribers' usage. Computers in their data centers are programmed to automatically send text messages notifying customers when they're near and over their plans' data and voice usage. Traffic Shaping: Prioritizing Traffic Deep Packet Inspection can provide information on network conditions because of its capability to see more fields in packets than only the "send to" address. Discerning only a packet's address is analogous to looking at the address of an envelope. DPI provides the capability to determine which application the packet is using by examining patterns within packets. It can distinguish Voice over Internet Protocol (VoIP) traffic from data, gaming, and video traffic. Carriers use traffic shaping to prioritize particular types of traffic. Giving certain types of traffic priority over other types is referred to as traffic shaping. Traffic shaping can be used to prioritize and deny access to the network by types of traffic, e.g. music VS. data or video, and traffic from particular organizations. Traffic from healthcare providers or companies that pay extra fees might be given higher priorities than other traffic. DPI software develops a database of patterns, also referred to as signatures. Each signature or pattern is associated with a particular application such as peer-to- peer music sharing or protocols such as VoIP. It can also be associated with traffic from certain hackers or even terrorists attempting to launch malicious attacks with a goal of disrupting Internet or government sites. The DPI software matches its own database of patterns found in www.TechnicalPDF.com packets to those associated with particular applications, and network attacks. DPI software can be installed in stand-alone switches connected to an ISP or carrier's network or as part of routers or firewalls. Routers