SEGMENT AND GEOGRAPHIC INFORMATION Product Revenues By The Three Product Lines (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 product_line	Jun. 30, 2013
Revenue from External Customers [Line Items]
Number Of Product Lines			3
Product revenues	$ 26,012	$ 26,285	$ 75,744	$ 74,879
Connectivity [Member]
Revenue from External Customers [Line Items]
Product revenues	10,132	12,199	29,556	32,172
Ethernet switching [Member]
Revenue from External Customers [Line Items]
Product revenues	14,001	9,541	36,955	28,178
Transport processing [Member]
Revenue from External Customers [Line Items]
Product revenues	$ 1,879	$ 4,545	$ 9,233	$ 14,529