Communications Systems Inc (JCS): Billionaire Mario Gabelli’s GAMCO Investors Ups Its Stake

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Signature
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
Dated: June 3, 2016
GGCP, INC.
MARIO J. GABELLI
By:/s/ Douglas R. Jamieson
     Douglas R. Jamieson
     Attorney-in-Fact
TETON ADVISORS, INC.
By:/s/ David Goldman 
     David Goldman
     General Counsel – Teton Advisors, Inc.
ASSOCIATED CAPITAL GROUP, INC.
By:/s/ Kevin Handwerker 
     Kevin Handwerker
                General Counsel & Secretary – Associated Capital Group, Inc.
GAMCO ASSET MANAGEMENT INC.
  GAMCO INVESTORS, INC.
GABELLI FUNDS, LLC
By:/s/ Douglas R. Jamieson 
     Douglas R. Jamieson
                    President & Chief Operating Officer – GAMCO Investors, Inc.
      President – GAMCO Asset Management Inc.
       President & Chief Operating Officer of the sole member of
Gabelli Funds, LLC

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