Inter Tel (INTL) 10-K 2004 FY Annual report

EXHIBIT 32.1

Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
(Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code)

     Pursuant to section 906 of the Sarbanes-Oxley Act of 2002 (subsections (a) and (b) of section 1350, chapter 63 of title 18, United States Code), each of the undersigned officers of Inter-Tel, Incorporated (“Company”), does hereby certify, to such officer’s knowledge, that:

     The Annual Report on Form 10-K for the fiscal year ended December 31, 2004 (“Form 10-K”) of the Company fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form10-K fairly presents, in all material respects, the financial condition and results of operations of the Company.

	/s/ STEVEN G. MIHAYLO
Date: March 14, 2005	Steven G. Mihaylo
	Chairman and Chief Executive Officer (Principal
	Executive Officer)
	/s/ KURT R. KNEIP
Date: March 14, 2005	Kurt R. Kneip,
	Senior Vice President and Chief Financial Officer
	(Principal Financial Officer)