, a GPS interface, and an Internet controller that allows them to interface with EPLRS and Battlefield Functional Area host computers. The introduction of Internet Protocol (IP) routing enables numerous software capabilities for radio systems [2]. EPLRS (Enhanced Position Location Reporting System) An AN/TSQ-158 that transmits digital information in support of tactical operations over a computer-controlled, TDMA communications network. EPLRS provides two major functions: data distribution and position location and reporting. EPLRS uses a frequency-hopping, spread-spectrum waveform in the UHF band. The network architecture is robust and self-healing. Radio firmware may be programmed from external devices. The peak data rate of 525 kbps supports application layer radio-to-radio interaction [15]. AN/PRC-117F A software programmable, multiband, multimode radio (MBMMR). The PRC-117F operates in the 30-512 MHz band. Embedded COMSEC, SAT-COM (satellite communication), SINCGARS, HaveQuick, and ECCM capabilities are standard. Various software applications, such as file transfer, Transmission Control Protocol (TCP) with IP, and digital voice, are included in this software programmable radio [7]. Jaguar PRC-116 In service in more than 30 nations, including the UK (Army) and US (Navy). It is a frequency-hopping, software programmable radio with considerable ECCM capability, resisting jamming by constantly shifting hopsets to unjammed frequencies. Security is further heightened by use of a scrambler. The Jaguar-V can also be used for data transmission at a rate of 16 kbps, and it may tolerate up to 50 radio nets, each with dozens of radios, at once; if each net is frequency hopping in a different sequence, it will still transmit to all of them [16]. JTT (Joint Tactical Terminal) A high-performance, software programmable radio. Its modular functionality is backward and forward compatible with the Integrated Broadcast Service (IBS). Using a software download, JTT can accept changes in format and protocol as IBS networks migrate