Comtech Telecommunications Corp.'s Arizona-based subsidiary, Comtech EF Data Corp., has received three orders totaling $6.2 million for satellite communications equipment. The equipment will be used by two Asian operators and one Middle Eastern operator to support and expand their satellite-based cellular backhaul networks.

While the orders specify a range of different products, the anchor product for all three orders is the CDM-625 Advanced Satellite Modem with DoubleTalk Carrier-in-Carrier. Released earlier this year, this modem is the first to combine Low Density Parity Check (LDPC) codes with the DoubleTalk Carrier-in-Carrier bandwidth compression, allowing for maximum savings under all conditions. Carrier-in-Carrier is based on Applied Signal Technology's DoubleTalk bandwidth compression technology. DoubleTalk uses "Adaptive Cancellation," a patented technology that allows the transmit and receive carriers of a full-duplex satellite link to be transmitted in the same transponder space. When combined with advanced forward error correction and modulation techniques, DoubleTalk Carrier-in-Carrier can deliver unprecedented operating expense savings. In addition, DoubleTalk Carrier-in-Carrier can provide capital expenditure savings by allowing a smaller BUC/HPA and/or antenna.