1 EXHIBIT 21 SUBSIDIARIES The Company's subsidiaries at December 31, 1996 were as follows: 1) Nbase Communications, Inc., a Maryland corporation 2) N.N.H. Computer Communications, Inc., a Kansas corporation 3) NBase Communications, Ltd., an Israeli corporation 4) NBase UK Ltd., a United Kingdom corporation 5) NBase Europe, GMBH a German corporation 6) NBase Fibronics, Limited an Israeli corporation 7) EDS LAN, an Italian corporation