When a group call is made, the network duplicates the digital voice packets for each phone in the group. Next, the network determines whether it is a one-to-one or a group call.As opposed to an interconnection call (a normal cell phone call), this is a dispatch call (Direct Connect).The Nextel iDEN-based network establishes a connection with your phone.You press the Direct Connect button, and you are prompted to enter the number(s) of the person (or group) you are calling. iDEN provides the following capabilities using a combination of half-duplex and full-duplex signals: With TDMA, a 25KHz frequency is split into six-time slots. Across a significant number of the national and international cellular service markets, Nextel has purchased significant segments of these frequencies. The radio spectrum for this service is located at 800 MHz, which is assigned to specialized mobile radio (SMR). The Direct Connect network is based on Motorola’s Integrated Digital Enhanced Network (iDEN). In addition to sharing a cell network with other providers, Nextel has its special cellular network with its frequencies and equipment. For companies with a workforce that can be spread out, like construction companies, Nextel is a popular choice. Nextel even allows you to connect to a group of users (up to 100 at once), similar to the dispatcher’s radio that police and taxi companies use. If the other user is within the local coverage area, this service is typically free. Nextel walkie-talkie phone offers a service called Direct Connect that lets you connect to another Nextel user with just a click. Signaling for help in an emergency, such as getting rescued from a forest or a desert.Taking part in a group activity, such as hiking, where the group can use the walkie-talkies to communicate with each other.Communicating with someone in a crowded place, such as a stadium or concert, where cell phone signals are likely to either be blocked or overwhelmed by the sheer amount of cell phone users.Communicating with someone a long distance away, whether it’s across the ocean, across town, or even across the street!.
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