| http://www.w3.org/ns/prov#value | - The PTT and intermediary security modules, codecs and other blocks shown in FIG. 2 may be hardware, software, or a combination of both hardware and software, for example.Wireless interface device 104 illustrated in FIG. 2 may also include a user interface 216, which may include, for example: an audio input device such as a microphone, an audio output device such as a speaker, a data output device
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