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The Services have advocated the need for adding support of COTS cellphones for both combat and non-combat voice and multimedia communications for the warfighters. This paper presents system architecture and a suite of protocols that may be used to effectively integrate COTS cellphones (dual-mode phones and smartphones), Wi-Fi Access Points and a call processing engine over the Joint Tactical Radio System (JTRS) wireless network to support non-combat uses. In this arrangement, a cellphone can initiate a call using Session Initiation Protocol (SIP) over a Wi-Fi access network and the JTRS core network.
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