Note 12 — Operating Segment Information

We currently consider ourselves to be in a single reportable segment under the authoritative guidance for segment reporting, specifically the development and sale of signaling telecommunications solutions and related value added applications and services.

Enterprise-Wide Disclosures

The following tables set forth, for the periods indicated, revenues from external customers by type (product, warranty and support, and services), as well as revenues by domestic versus international regions (in thousands):


	For the Three Months Ended June 30,
	2011		2010
Product revenues	$	63,736	$	74,889
Warranty and support revenues		25,169		21,691
Professional and other services revenues		7,895		12,927

Total revenues	$	96,800	$	109,507


	For the Six Months Ended June 30,
	2011		2010
Product revenues	$	134,652	$	151,428
Warranty and support revenues		45,420		40,693
Professional and other services revenues		24,487		33,377

Total revenues	$	204,559	$	225,498


	Revenues from External Customers By Geographic Region
	Three Months Ended June 30,				Six Months Ended June 30,
	2011		2010		2011		2010
United States	$	37,851	$	45,055	$	74,364	$	80,623
International		58,949		64,452		130,195		144,875

Total revenues from external customers	$	96,800	$	109,507	$	204,559	$	225,498

For the three months ended June 30, 2011, revenues from AT&T and Verizon represented 19% and 11% of our total revenues, respectively. For the six months ended June 30, 2011, revenues from AT&T and Verizon represented 14% and 15% of our total revenues, respectively. For the three months ended June 30, 2010, revenues from AT&T and Verizon represented 14% and 12% of our total revenues, respectively. For the six months ended June 30, 2010, revenues from AT&T represented 14% of our total revenues.

For the three months ended June 30, 2011, revenues from Brazil accounted for 12% of our total revenues, and for the six months ended June 30, 2011, revenues from India and Brazil accounted for 14% and 10% of our total revenues, respectively. For the three and six months ended June 30, 2010, revenues from India accounted for 14% and 12% of our total revenues, respectively.

The following table sets forth, for the periods indicated, our long-lived assets including net property and equipment, and other assets by geographic region (in thousands):


	Long-Lived Assets By Geographic Region
	June 30, 2011		December 31, 2010
United States	$	30,578	$	30,836
Other		8,142		7,840

Total long-lived assets	$	38,720	$	38,676