The Company and Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jun. 29, 2012 weeks	Jul. 01, 2011	Jul. 02, 2010
Significant Accounting Policies [Line Items]
Number of weeks in fiscal period	52
Proceeds from long-term debt	$ 8.3	$ 6.0	$ 0
Reclassification of Short Term Debt to Long Term Debt		6.0
Long-term debt	8.8	6.0
Customer letters of credit being discounted	90.7	80.6	91.1
Interest expense	0.3	0.4	0.7
Total amortization of capitalized software		0.5	2.8
Net foreign currency exchange gain (loss)	(1.5)	(2.6)	0.3
Retirement plan expense	$ 2.8	$ 3.3	$ 2.8
Minimum
Significant Accounting Policies [Line Items]
Extended Payment Term	1 year
Product warranty period	12 months
Network management software product warranty period	30 days
Maximum
Significant Accounting Policies [Line Items]
Product warranty period	24 months
Network management software product warranty period	90 days
Buildings and leasehold improvements | Minimum
Significant Accounting Policies [Line Items]
Useful life	2 years
Buildings and leasehold improvements | Maximum
Significant Accounting Policies [Line Items]
Useful life	45 years
Software | Minimum
Significant Accounting Policies [Line Items]
Useful life	3 years
Software | Maximum
Significant Accounting Policies [Line Items]
Useful life	5 years
Machinery and equipment | Minimum
Significant Accounting Policies [Line Items]
Useful life	2 years
Machinery and equipment | Maximum
Significant Accounting Policies [Line Items]
Useful life	5 years
Mobile Telephone Networks
Significant Accounting Policies [Line Items]
Percentage of total revenue	17.00%	14.00%	17.00%
Customer Concentration Risk | Accounts Receivable
Significant Accounting Policies [Line Items]
Percentage of accounts receivable	7.00%	8.00%