Item 7.01 Regulation FD Disclosure.

On May 13, 2009, TranSwitch Corporation (the "Company") delivered a letter to Mr. Gabriel Brener, a security holder of the Company, in response to a letter from Mr. Brener dated April 28, 2009, received by Dr. Santanu Das, Chief Executive Officer and President of the Company. The Company's letter to Mr. Brener is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

Safe Harbor Statement Regarding Forward-Looking Statements

The statements in this Current Report on Form 8-K and in the exhibit 99.1 attached hereto and incorporated herein by reference relating to matters that are not historical facts including statements regarding expectations for future financial results and the markets for TranSwitch's products, are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Investors are cautioned that these forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from those contained in the forward-looking statements, including without limitation the risk that TranSwitch's and Centillium's businesses will not be integrated successfully or will be delayed; the risk that the merger of the companies will involve unexpected costs or unexpected liabilities; uncertainties concerning the effect of the merger on relationships with customers, employees and suppliers of either company; and other risks associated with TranSwitch's businesses such as the risks associated with acquiring new businesses; the risk of downturns in economic conditions generally and in the telecommunications and data communications markets and the semiconductor industry specifically; risks in product development and market acceptance of and demand for TranSwitch's products and products developed by TranSwitch's customers; risks relating to TranSwitch's indebtedness; risks of failing to attract and retain key managerial and technical personnel; risks associated with foreign sales and high customer concentration; risks associated with competition and competitive pricing pressures; risks associated with investing in new businesses; risks of dependence on third-party VLSI fabrication facilities; risks related to intellectual property rights and litigation; risks in technology development and commercialization; and other risks detailed in TranSwitch's filings with the Securities and Exchange Commission.

Item 9.01 Financial Statements and Exhibits

The Exhibit included as part of this Current Report is listed in the attached Exhibit Index. The Exhibit Index, together with the Exhibit listed therein, is incorporated herein by this reference.

(d) Exhibits.

Exhibit No. Description
99.1 Letter to Mr. Gabriel Brener, dated May 13, 2009.

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