CONCENTRATION OF CREDIT RISK (Tables)

12 Months Ended

Jul. 28, 2012

Concentration of Credit Risk [Abstract]

Concentration of credit risk

AT&T Inc. (“AT&T”), CenturyLink, Inc. (“CenturyLink”), Comcast Corporation (“Comcast”), and Verizon Communications, Inc. (“Verizon”) represent a significant portion of the Company’s customer base and were over 10% or more of total revenue during fiscal 2012, 2011, or 2010 as reflected in the following table:

	Fiscal Year Ended
	2012	2011	2010
AT&T	13.7%	21.1%	20.4%
CenturyLink*	13.6%	10.8%	11.6%
Comcast	12.6%	14.3%	14.3%
Verizon	11.3%	8.9%	11.5%

Schedules of Concentration of Risk, by Receivable and Unbilled Revenue [Table Text Block]

Customers representing 10% or more of combined amounts of trade accounts receivable and costs and estimated earnings in excess of billings during fiscal 2012 or 2011 had the following outstanding balances and the related percentage of the Company’s total outstanding balances:

	July 28, 2012					July 30, 2011
	Amount		% of Total			Amount		% of Total
			(Dollars in millions)
CenturyLink	$	47.6		17.7	%	$	41.4		18.0	%
Windstream Corporation	$	35.4		13.2	%	$	20.5		8.9	%
Verizon	$	30.5		11.3	%	$	26.4		11.5	%
AT&T	$	24.7		9.2	%	$	29.2		12.7	%