Powerwave (PWAV) came up light again Monday, blaming its big telco and wireless networking customers for a sales shortfall.

The Santa Ana, Calif., wireless-component supplier made $12.6 million, or a dime a share, for the second quarter. Excluding special charges, Powerwave had adjusted income of $17.5 million, or 13 cents a share. That's a penny short of the Thomson First Call consensus estimate and compares with an adjusted profit of 14 cents a year ago.

Sales rose to $232.4 million in the second quarter from $186.3 million in revenue in the year-ago quarter, short of the $247.2 million Thomson target.

"We encountered less than expected demand from our North American operator customers which impacted our revenues for the quarter," CEO Ron Buschur said in a press release Monday.

Powerwave's biggest customers were Nokia ( NOK), Siemens ( SE) and Cingular, a joint venture between AT&T ( T) and BellSouth ( BLS).

Spending cuts by telcos, particularly Cingular, have been painful for suppliers like Powerwave. In April, the company warned of a 20% shortfall in first-quarter sales after seeing slack demand from the nation's largest cell phone service provider.

Shares of Powerwave closed up a penny at $7.94, but then fell 34 cents to $7.60 in after-hours trading.

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