Exhibit 21 SUBSIDIARIES OF THE REGISTRANT THE FOLLOWING IS THE REGISTRANT'S SUBSIDIARY AS OF SEPTEMBER 25, 2001: State of Jurisdiction Name of Corporation ---- -------------- TII Corporation Delaware TII International, Inc. Delaware Telecommunications Industries, Inc. New York TII Dominicana, Inc. Delaware TII Systems, Inc. Puerto Rico The Company is in the process of dissolving and liquidating each of the subsidiaries except TII Systems, Inc.