EXHIBIT 99



         CERTIFICATE UNDER SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, each of the
undersigned certifies that this periodic report fully complies with the
requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934
and that information contained in this periodic report fairly presents, in all
material respects, the financial condition and results of operations of Digi
International Inc.


                                /s/ Joseph T. Dunsmore
                                ------------------------------------------------
                                Joseph T. Dunsmore
                                President, Chief Executive Officer, and Chairman


                                /s/ Subramanian Krishnan
                                ------------------------------------------------
                                Subramanian Krishnan
                                Senior Vice President, Chief Financial Officer
                                and Treasurer