EXHIBIT 15

                  LETTER RE: UNAUDITED INTERIM FINANCIAL INFORMATION



                                                                      EXHIBIT 15


Securities and Exchange Commission
450 Fifth Street N.W.
Washington, D.C. 20549

We are aware that our report dated February 6, 1997 on the reviews of interim
condensed consolidated financial information of Digi International Inc. and
Subsidiaries (the Company) for the three month period ended December 31, 1996
and 1995, and included in the Company's Form 10-Q for the quarter ended December
31, 1996, is incorporated by reference in the Company's registration statements
on Form S-8 (Registration Nos. 33-32956, 33-38898, 333-99 and 333-1821) and Form
S-3 (Registration No. 33-59223).  Pursuant to Rule 436(c), under the Securities
Act of 1933, this report should not be considered a part of the registration
statements prepared or certified by us within the meaning of Sections 7 and 11
of that Act.


                                            /s/ COOPERS & LYBRAND L.L.P.


Minneapolis, Minnesota
February 6, 1997