EXHIBIT 99.2

                    CERTIFICATION OF CHIEF FINANCIAL OFFICER
                                   PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

As of the date hereof, I, Kurt R. Kneip, certify,  pursuant to 18 U.S.C. Section
1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that
the  Quarterly  Report of Inter-Tel,  Incorporated.  on Form 10-Q for the fiscal
quarter  ended March 31, 2003 fully  complies with the  requirements  of Section
13(a) or  15(d)  of the  Securities  exchange  Act of 1934 and that  information
contained in such Quarterly  Report on Form 10-Q fairly presents in all material
respects  the  financial  condition  and  results of  operations  of  Inter-Tel,
Incorporated.

                                        By: /s/ Kurt R. Kneip
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                                        Name: Kurt R. Kneip
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                                        Title: Chief Financial Officer
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                                        Dated: May 12, 2003
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