Integral Systems, Inc.'s, (NASDAQ: ISYS) subsidiary, RT Logic (www.rtlogic.com), has a contract from Iridium Communications Inc., (NASDAQ: IRDM) to supply two Telemetrix 400XR Modulator/Receiver (T400XR) modems. The T400XRs will serve as Iridium’s nexgen satellite communication modems, handling all Iridium user voice and data between satellite phones and the terrestrial network for their Feeder Link Earth Terminal (FLT) Modem upgrade.

RT Logic’s T400XR modem provides flexibility for supporting future missions by implementing new waveforms and networking protocols via software upgrades.  In addition, the modular nature of the T400XR allows for upgrades to support new frequency bands and RF performance requirements.  In fact, Iridium and RT Logic are planning to use these upgrade paths enabling the T400XR units to support Iridium’s NEXT project, a 2G satellite constellation planned for launch in 2014. The T400XR is an adaptable, firmware-defined modulator, demodulator, tracking receiver, and digital processing unit that replaces the functions previously provided by four unique chassis within Iridium’s FLT. The T400XR is configured with an L-band interface for RF signal processing and has a network interface for input and output of user message data. In addition to demodulation and modulation of user message data, the T400XR will also provide frame processing and packet routing consistent with Iridium’s unique requirements.