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                                                                EXHIBIT 10(e)(i)







                                February 5, 2001

PERSONAL AND CONFIDENTIAL
Mr. Subramanian Krishnan
Digi International Inc.
11001 Bren Road East
Minnetonka, MN  55343

Dear Kris:

         This letter confirms the terms of an amendment to your severance
agreement with the Company as set forth in the letter agreement dated March 26,
1999 (the "Agreement"). Except as specifically provided for herein, the terms of
the Agreement remain in full force and effect.

         If you are terminated by the Company without "cause" at any time, you
would be entitled to severance equal to one year's base salary and a bonus (if
earned), based on your cash bonus target that would be pro-rated for the portion
of the fiscal year through the termination date.

         The Agreement as amended by this letter constitutes the entire
agreement between you and the Company regarding the subject matter contained
therein and supersedes all prior agreements and understandings relating thereto.

         If the terms outlined above are acceptable, please confirm by signing
the enclosed copy below and returning it to me.

                                      Very truly yours,
                                      DIGI INTERNATIONAL INC.

                                      /s/ Joseph T. Dunsmore

                                      By Joseph T. Dunsmore
                                      President and Chief Executive Officer

                                      ACCEPTED:


                                      /s/ Subramanian Krishnan
                                      ------------------------------------------
                                             Subramanian Krishnan