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EXHIBIT 31.1

CERTIFICATION OF CHIEF EXECUTIVE OFFICER
AS ADOPTED PURSUANT TO
SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

I, Steven G. Mihaylo, certify that:



| | 1. |  | I have reviewed this annual report on Form 10-K of Inter-Tel,
Incorporated.                                                                                                                                                                                                                               
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| | 2. |  | Based on my knowledge, this report does not contain any
untrue statement of a material fact or omit to state a material fact
necessary to make the statements made, in light of the circumstances
under which such statements were made, not misleading with respect
to the period covered by this report.
|
| | 3. |  | Based on my knowledge, the financial statements, and other
financial information included in this report, fairly present in all
material respects the financial condition, results of operations and
cash flows of the registrant as of, and for, the periods presented
in this report;                   
|
| | 4. |  | The registrants other certifying officer and I are
responsible for establishing and maintaining disclosure controls and
procedures (as defined in Exchange Act Rules 13a-15(e) and
15d-15(e)) for the registrant and have:                                                                               



| | a. |  | Designed such disclosure controls and procedures,
or caused such disclosure controls and procedures to be
designed under our supervision, to ensure that material
information relating to the registrant, including its
consolidated subsidiaries, is made known to us by others
within those entities, particularly during the period in which
this report is being prepared;
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|
| | b. |  | Evaluated the effectiveness of the registrants
disclosure controls and procedures and presented in this
report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the
period covered by this report based on such evaluation, and                                                                                           
|
| | c. |  | Disclosed in this report any change in the
registrants internal control over financial reporting that
occurred during the registrants most recent fiscal quarter
that has materially affected, or is reasonably likely to
materially affect, the registrants internal control over
financial reporting; and                                                                



| | 5. |  | The registrants other certifying officers and I have
disclosed, based on our most recent evaluation of internal control
over financial reporting, to the registrants auditors and audit
committee of the registrants board of directors:
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| | a. |  | All significant deficiencies and material
weaknesses in the design or operation of internal controls
over financial reporting which are reasonably likely to
adversely affect the registrants ability to record, process,
summarize and report financial information; and
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|
| | b. |  | Any fraud, whether or not material, that involves
management or other employees who have a significant role in
the registrants internal control over financial reporting.                                                                                                

Date: March 12, 2004

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| | By:    |  | /s/ Steven G. Mihaylo  
| | Name:  |  | Steven G. Mihaylo      
| | Title: |  | Chief Executive Officer