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Wireless phone services are any telephone service that allows the telephone handset to transmit and receive without any physical connectivity (wires) to a network. Wireless phone service often refers to mobile or cellular telephone service, but it can also refer to Voice over Internet Protocol (also called VoIP, IP Telephony, Internet telephony, and Digital Phone). VoIP is the routing of wireless telephone services over the Internet, or any other IP-based network. The voice data flows over a general-purpose packet-switched network, instead of traditional dedicated, circuit-switched voice transmission lines. Voice over IP traffic might be deployed on any IP network, including ones lacking a connection to the rest of the Internet, for instance on a private building-wide LAN.
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