Comtech Systems Inc., a unit of Melville-based Comtech Telecommunications Corp., has received orders valued at $1.2 million for additional modem upgrade kits, the company has announced.

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The subsidiary, Comtech Systems, based in Orlando, Fla., will make the kits for the U.S. Army, which is using the modem terminals in Iraq and Afghanistan.

Comtech chief executive Fred Kornberg said the company was “extremely pleased by this award from the U.S. Army.”