Geographic Information Product Groups and Customer Concentration Information - Additional Information (Detail)	3 Months Ended			12 Months Ended	3 Months Ended
	Sep. 28, 2013 Segment	Sep. 28, 2013 Cisco Systems Inc	Sep. 29, 2012 Cisco Systems Inc	Jun. 29, 2013 Huawei Technologies Co Ltd	Sep. 28, 2013 Flextronics International Ltd.	Sep. 28, 2013 Coriant
Revenue, Major Customer [Line Items]
Operating segment	1
Entity-Wide Revenue, Major Customer, Percentage		15.00%	16.00%			11.00%
Percentage of accounts receivable				15.00%	14.00%	10.00%