Exhibit 16 November 24 1999 Office of the Chief Accountant Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Dear Sir/Madam: We have read the statements in Item 4 included in the Form 8-K dated November 19, 1999 of Cumetrix Data Systems Corp. to be filed with the Securities and Exchange Commission and have the following comments: a. We agree with the statements made in sentences 1 and 2 with regards to our termination and our reports. However, we have no basis to agree or disagree with the statement in sentence 3 concerning this decision being approved by the Board of Directors. b. We agree with the statements made in sentences 4,5, and 6. Very truly yours, ARTHUR ANDERSEN LLP Copy to: Mr. Max Toghraie, Cumetrix Data Systems Corp.