CONCENTRATION OF CREDIT RISK

12 Months Ended

Jul. 28, 2012

Concentration of Credit Risk [Abstract]

Concentration of Credit Risk

16. Concentration of Credit Risk

The Company is subject to concentrations of credit risk relating primarily to its cash and equivalents, trade accounts receivable and costs and estimated earnings in excess of billings. The Company grants credit under normal payment terms, generally without collateral, to its customers. These customers primarily consist of telephone companies, cable television multiple system operators, and electric and gas utilities. With respect to a portion of the services provided to these customers, the Company has certain statutory lien rights which may in certain circumstances enhance the Company's collection efforts. Adverse changes in overall business and economic factors may impact the Company's customers and increase credit risks. These risks may be heightened as a result of the current economic weakness and market volatility. In the past, some of the Company's customers have experienced significant financial difficulties and likewise, some may experience financial difficulties in the future. These difficulties expose the Company to increased risks related to the collectability of amounts due for services performed.

The Company's customer base is highly concentrated. The top five customers accounted for approximately 59.6%, 61.9% and 66.3% of its total revenues in fiscal 2012, 2011, and 2010, respectively. 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%

*For comparison purposes, revenues from CenturyLink, Inc. and Qwest Communications International, Inc. have been combined for periods prior to their April 2011 merger.

The Company believes that none of its significant customers were experiencing financial difficulties that would materially impact the collectability of the Company's trade accounts receivable and costs in excess of billings as of July 28, 2012. 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	%