EXHIBIT 5.1

                    [Baker & McKenzie LLP Letterhead Omitted]

                                 August 31, 2006

RadiSys Corporation
5445 NE Dawson Creek Rd.
Hillsboro, OR 97124

Ladies and Gentlemen:

      We have acted as securities counsel for RadiSys Corporation, an Oregon
corporation (the "Company"), in connection with its filing with the Securities
and Exchange Commission (the "SEC") of a registration statement on Form S-8 (the
"Registration Statement") under the Securities Act of 1933, as amended (the
"Securities Act"), with respect to the issuance of up to 365,000 shares of its
common stock, no par value (the "Shares"), which are issuable in connection with
the Company's Stock Plan for Convedia Employees (the "Plan").

      We have reviewed a copy of the Plan and forms of award agreements
(collectively, the "Award Agreements") and we have examined the originals, or
photostatic or certified copies, of such records of the Company, of certificates
of officers of the Company and of public documents, and such other documents as
we have deemed relevant and necessary as the basis of the opinions set forth
below. In such examination, we have assumed the genuineness of all signatures,
the authenticity of all documents submitted to us as originals, the conformity
to original documents of all documents submitted to us as photostatic or
certified copies and the authenticity of the originals of such copies.

      Based upon and subject to the foregoing, we are of the opinion that:

      The Shares have been duly and validly authorized, and when issued in
      accordance with the terms of the Plan and the applicable Award Agreements,
      and upon payment of the exercise price, if any, in accordance with the
      terms of applicable Award Agreements, and assuming no change in the
      applicable law or facts, will be validly issued, fully paid and
      non-assessable.

      The opinions expressed above are limited to the laws of the Business
Corporation Law of the State of Oregon and the federal laws of the United States
of America.

      This opinion letter is limited to the matters stated herein, and no
opinion is implied or may be inferred beyond the matters expressly stated. We
hereby consent to the use of our opinion as herein set forth as an exhibit to
the Registration Statement. In giving this consent, we do not hereby admit that
we come within the category of persons whose consent is required under Section 7
of the Securities Act or the rules and regulations of the SEC promulgated
thereunder or Item 509 of Regulation S-K.

                                                       Very truly yours,

                                                       BAKER & McKENZIE LLP

                                                       /s/ Baker & McKenzie LLP