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Tech. Sgt. Monica Jones, a cyber transport systems craftsman and Senior Airman Phillip Abraham, a cyber transport systems journeyman, both assigned to the 35th Combat Communications Squadron, test a deployable Voice over Internet Protocol (VoIP) phone switch in a simulated deployed environment during their annual tour at Homestead Air Reserve Base, Fla. This phone system can handle up to 5,000 users in support of Air Expeditionary Force, Combatant Command, or humanitarian contingencies. (U.S. Air Force photo)
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