(Reuters) - Communications gear maker Motorola Solutions Inc cut its full-year sales forecast for the second time as it struggled with a slowdown in sales to businesses, and posted quarterly revenue below analysts' estimates. The company forecast revenue of between $8.69 billion and $8.77 billion for 2013, missing the $8.93 billion analysts were looking for on average, according to Thomson Reuters I/B/E/S. It said enterprise sales fell 5 percent in the second quarter to $656 million, dragging down overall revenue by 2 percent to $2.10 billion. ...

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