Penril DataComm Networks, Inc.
                        1300 Quince Orchard Blvd.
                         Gaithersburg, MD  20878
                                    

Mr. Ronald A. Howard
9010 Falls Road                              October 25, 1995
Potomac, MD  20854

     Re: Amendment to Employment Agreement

Dear Ron:

     Reference is made to the Employment Agreement dated as of
May 1, 1993(the "Employment Agreement") between Penril DataComm
Networks, Inc. and Ronald A. Howard.  Unless otherwise indicated,
capitalized terms used herein shall have the same meaning as in
the Employment Agreement.

1.   Amendments to Employment Agreement.

     In consideration of the mutual covenants set forth herein,
     the parties agree that the Employee Agreement is hereby
     amended, effective immediately, in the following respects:

     (a) Section 3 of the Employment Agreement is hereby amended
     to delete the date "April 30, 1996" and to substitute for it
     the date "April 30, 1997."

     (b) Subsection 4(a) of the Employment Agreement is hereby
     amended to delete the dollar figure "$200,000" and to
     substitute for it the dollar figure "$225,000."

     (c) Section 4 of the Employment Agreement is hereby amended
     by to add a new subsection 4(f) thereto to read as follow"

          "(f) If the Company is sold or acquired during the term
          of this Agreement, whether by sale of shares, merger,
          consolidation, share exchange, sale of all or
          substantially all assets or otherwise, then immediately
          upon the closing of such sale or acquisition, Executive
          shall receive a bonus equal to 30 months salary at the
          rate specified in subsection 4(a) hereof."

     
(d) Section 9 of the Employment Agreement is hereby amended to
add a new subsection (g) thereto to read as follows:

          "(g) Sections 3.02 and 3.04 of the Merger Agreement are
          hereby incorporated herein by reference and made part
          hereof, and shall be binding on Executive to the same
          extent as if fully set forth herein, with the following
          changes:(i) the covenants set forth in subsections (b)
          and (c) of Section 3.02 of the Merger Agreement shall
          be binding on Executive through April 30, 1997; (ii)
          the convenants set forth in Section 3.04 of the Merger
          Agreement shall be binding on Executive through April
          30, 1997; and (iii) the covenant set forth in
          subsection 3.04 (a)(iv) of the Merger Agreement shall
          not prevent Executive from being appointed or elected
          to the Board of Directors of the Company."

2. Section Headings.

     The section headings in this letter agreement are inserted
     for convenience only and shall not be part of this
     instrument.

3.   Governing Law.

     This letter agreement shall be governed by and construed in
     accordance with the laws of the State of New York.

4.   Effect of Amendment.

     Except as amended and supplemented hereby, all of the terms,
     conditions, covenants and provisions of the Employment
     Agreement shall remain and continue in full force and effect
     and are hereby ratified, repeated and confirmed in all
     respects.

5.   Entire Agreement.

     This letter agreement and the Employment Agreement as
     amended and supplemented hereby constitute the entire
     agreement and the understanding between the parties hereto
     with respect to Executive's employment relationship with the
     Company and supersede any and all prior agreements and
     understandings relating thereto.


6.   Counterparts; Effectiveness.

     This letter agreement may be signed in any number of
     counterparts, each of which shall be original, with the same
     effect as if the signatures thereto and hereto were upon the
     same instrument.  This letter agreement shall not be
     effective and binding upon either party hereto until signed
     by both of them.

     Please confirm your agreement to the foregoing by signing
where indicated on the counterpart of this letter agreement
provided and returning it to the undersigned.

                              Very truly yours,

                              PENRIL DATACOMM NETWORKS, INC.


                              BY:  \s\Henry David Esptein
                                   ---------------------

                                   Henry David Epstein
                                   Chairman, President
                                    and Chief Executive Officer

AGREED TO:

\s\Ronald A. Howard
- --------------------------

Ronald A. Howard
Dated: October 25, 1995