Notes to GAAP/Adjusted Non-GAAP Financial Measures (Preliminary & Unaudited) Barclay's Capital Conference 23 May 23, 2012 The Company reports its financial results in accordance with accounting principles generally accepted in the United States (“GAAP” or referred to herein as “reported”). However, management believes that certain non-GAAP financial measures provide management and other users with additional meaningful financial information that should be considered when assessing our ongoing performance. Our management regularly uses our supplemental non-GAAP financial measures internally to understand, manage and evaluate our business and make operating decisions. These non-GAAP measures are among the factors management uses in planning for and forecasting future periods. Non-GAAP financial measures should be viewed in addition to, and not as an alternative to, the Company’s reported results prepared in accordance with GAAP. Our non-GAAP financial measures reflect adjustments based on the following items, as well as the related income tax effects: Purchase Accounting Impacts Related to Deferred Revenue: In connection with our acquisition of BigBand, business combination rules require us to account for the fair values of arrangements for which acceptance has not been obtained, and post contract support in our purchase accounting. The non-GAAP adjustment to our sales and cost of sales is intended to include the full amounts of such revenues. We believe the adjustment to these revenues is useful as a measure of the ongoing performance of our business. We have historically experienced high renewal rates related to our support agreements and our objective is to increase the renewal rates on acquired post contract support agreements; however, we cannot be certain that our customers will renew our contracts. Stock-Based Compensation Expense: We have excluded the effect of stock-based compensation expenses in calculating our non-GAAP operating expenses and net income measures. Although stock-based compensation is a key incentive offered to our employees, we continue to evaluate our business performance excluding stock-based compensation expenses. We record non-cash compensation expense related to grants of options and restricted stock. Depending upon the size, timing and the terms of the grants, the non-cash compensation expense may vary significantly but will recur in future periods. Acquisition Costs: We have excluded the effect of acquisition related and other expenses and the effect of restructuring expenses in calculating our non-GAAP operating expenses and net income measures. We incurred significant expenses in connection with our recent acquisition of BigBand, which we generally would not have otherwise incurred in the periods presented as part of our continuing operations. Acquisition related expenses consist of transaction costs, costs for transitional employees, other acquired employee related costs, and integration related outside services. We believe it is useful to understand the effects of these items on our total operating expenses. Restructuring Costs: We have excluded the effect of restructuring charges in calculating our non-GAAP operating expenses and net income measures. Restructuring expenses consist of employee severance, abandoned facilities, and other exit costs. We believe it is useful to understand the effects of these items on our total operating expenses. Amortization of Intangible Assets: We have excluded the effect of amortization of intangible assets in calculating our non-GAAP operating expenses and net income measures. Amortization of intangible assets is non-cash, and is inconsistent in amount and frequency and is significantly affected by the timing and size of our acquisitions. Investors should note that the use of intangible assets contributed to our revenues earned during the periods presented and will contribute to our future period revenues as well. Amortization of intangible assets will recur in future periods. Impairment of Goodwill and Intangibles: We have excluded the effect of the estimated impairment of goodwill and intangible assets in calculating our non-GAAP operating expenses and net income (loss) measures. Although an impairment does not directly impact the Company’s current cash position, such expense represents the declining value of the technology and other intangibles assets that were acquired. We exclude these impairments when significant and they are not reflective of ongoing business and operating results. Loss on Sale of Product Line: We have excluded the effect of a loss on the sale of a product line in calculating our non-GAAP operating expenses and net income measures. We believe it is useful to understand the effects of these items on our total operating expenses. Non-Cash Interest on Convertible Debt: We have excluded the effect of non-cash interest in calculating our non-GAAP operating expenses and net income measures. We record the accretion of the debt discount related to the equity component non-cash interest expense. We believe it is useful to understand the component of interest expense that will not be paid out in cash. Impairment of Investment: We have excluded the effect of an other-than-temporary impairment of a cost method investment in calculating our non-GAAP financial measures. We believe it is useful to understand the effect of this non-cash item in our other expense (income). Income Tax Expense: We have excluded the tax effect of the non-GAAP items mentioned above. Additionally, we have excluded the effects of certain tax adjustments related to state valuation allowances, research and development tax credits and provision to return differences. | 
