EXHIBIT 99.2

Segment and Category Revenues

(New Reporting Structure)

(Unaudited)

(In thousands)

	Three Months Ended
	March 31,
	2016		2015
Segment Revenues:
Network Solutions	$	123,883	$	129,505
Services & Support		18,321		13,330
Total	$	142,204	$	142,835
Category Revenues:
Access & Aggregation	$	93,855	$	92,851
Customer Devices		32,353		31,704
Traditional & Other Products		15,996		18,280
Total	$	142,204	$	142,835
Sales by Geographic Region:
United States	$	116,348	$	83,472
International		25,856		59,363
Total	$	142,204	$	142,835

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Product and Segment Revenues

(Former Reporting Structure)

(Unaudited)

(In thousands)

	Three Months Ended March 31,
	2016			2015
Product Revenues:
Carrier Systems	$	100,173		$	100,439
Business Networking		35,661			35,381
Loop Access		6,370			7,015
Total	$	142,204		$	142,835
Subcategories included in the above:
Broadband Access (included in Carrier Systems)	$	81,778		$	84,794
Optical (included in Carrier Systems)		16,228			12,504
Internetworking (Netvanta & Multi-service Access Gateways) (included in Business Networking)		34,868			34,159
Total Core Products		132,874			131,457
Percentage of Total Revenue		93	%		92	%
HDSL (does not include T1) (included in Loop Access)		5,773			6,703
Other Products (excluding HDSL)		3,557			4,675
Total Legacy Products		9,330			11,378
Percentage of Total Revenue		7	%		8	%
Total	$	142,204		$	142,835
Segment Revenues:
Carrier Networks	$	118,398		$	116,014
Enterprise Networks		23,806			26,821
Total	$	142,204		$	142,835
Sales by Geographic Region:
United States	$	116,348		$	83,472
International		25,856			59,363
Total	$	142,204		$	142,835

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Segment and Category Information

(Recast Historical Results)

(Unaudited)

(In thousands)

Segment Revenues
Three months ended	March 31, 2015		June 30, 2015		September 30, 2015		December 31, 2015		Full Year 2015
Network Solutions	$	129,505	$	144,098	$	138,120	$	115,699	$	527,422
Services & Support		13,330		16,040		19,958		23,314		72,642
Total Revenue	$	142,835	$	160,138	$	158,078	$	139,013	$	600,064
Segment Revenues
Three months ended	March 31, 2014		June 30, 2014		September 30, 2014		December 31, 2014		Full Year 2014
Network Solutions	$	130,954	$	158,832	$	146,035	$	123,711	$	559,532
Services & Support		16,050		17,297		16,857		20,271		70,475
Total Revenue	$	147,004	$	176,129	$	162,892	$	143,982	$	630,007
Segment Gross Profit
Three months ended	March 31, 2015		June 30, 2015		September 30, 2015		December 31, 2015		Full Year 2015
Network Solutions	$	57,945	$	59,888	$	62,151	$	53,595	$	233,579
Services & Support		7,618		8,358		8,498		8,844		33,318
Total Gross Profit	$	65,563	$	68,246	$	70,649	$	62,439	$	266,897
Segment Gross Profit
Three months ended	March 31, 2014		June 30, 2014		September 30, 2014		December 31, 2014		Full Year 2014
Network Solutions	$	67,330	$	76,162	$	69,344	$	58,681	$	271,517
Services & Support		10,460		10,635		8,913		9,802		39,810
Total Gross Profit	$	77,790	$	86,797	$	78,257	$	68,483	$	311,327
Category Revenues
Three months ended	March 31, 2015		June 30, 2015		September 30, 2015		December 31, 2015		Full Year 2015
Access & Aggregation	$	92,851	$	112,732	$	103,431	$	96,684	$	405,698
Customer Devices		31,704		30,042		35,545		28,274		125,565
Traditional & Other Products		18,280		17,364		19,102		14,055		68,801
Total Revenue	$	142,835	$	160,138	$	158,078	$	139,013	$	600,064
Category Revenues
Three months ended	March 31, 2014		June 30, 2014		September 30, 2014		December 31, 2014		Full Year 2014
Access & Aggregation	$	87,645	$	119,144	$	104,535	$	90,445	$	401,769
Customer Devices		32,498		37,351		35,111		33,091		138,051
Traditional & Other Products		26,861		19,634		23,246		20,446		90,187
Total Revenue	$	147,004	$	176,129	$	162,892	$	143,982	$	630,007

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