SCHEDULE 14A
                                 (Rule 14a-101)

                     INFORMATION REQUIRED IN PROXY STATEMENT

                            SCHEDULE 14A INFORMATION
Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Filed by the Registrant  / /
Filed by a party other than the Registrant /x/

Check the appropriate box:
/ / Preliminary Proxy Statement
/ / Confidential, for the use of the Commission only (as permitted by
    Rule 14a-6(e)(2))
/ / Definitive Proxy Statement
/ / Definitive Additional Materials
/x/ Soliciting Material under ss.240.14a-12

                             INTER-TEL, INCORPORATED
--------------------------------------------------------------------------------
                (Name of Registrant as Specified In Its Charter)

                                STEVEN G. MIHAYLO
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    (Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check the appropriate box):
/x/     No fee required.
/ /     Fee computed on table below per Exchange Act Rules 14a-6(i)(1) and 0-11.
(1)     Title of each class of securities to which transaction applies:

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(2)     Aggregate number of securities to which transaction applies:

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(3)     Per unit price or other underlying value of transaction computed
        pursuant to Exchange Act Rule 0-11 (set forth the amount on which the
        filing fee is calculated and state how it was determined):

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(4)     Proposed maximum aggregate value of transaction:

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(5)     Total fee paid:

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/ /     Fee paid previously with preliminary materials.

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/ /      Check box if any part of the fee is offset as provided by Exchange Act
         Rule 0-11(a)(2) and identify the filing for which the offsetting fee
         was paid previously. Identify the previous filing by registration
         statement number, or the Form or Schedule and the date of its filing.

(1)      Amount previously paid:

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(2)      Form, Schedule or Registration Statement No.:

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(3)      Filing party:

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(4)      Date filed:

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         On April 10, 2006, Steven G. Mihaylo ("Mr. Mihaylo") filed with the
Securities and Exchange Commission (the "SEC") an amendment (the "Schedule 13D
Amendment") to the Schedule 13D, dated March 3, 2006, and filed by Mr. Mihaylo
with the SEC on March 6, 2006, with respect to the common stock, no par value
per share, of Inter-Tel, Incorporated, an Arizona corporation ("Inter-Tel"). The
Schedule 13D Amendment contained the following disclosure under Item 4 thereof
which could be viewed as soliciting material under Regulation 14A of the
Securities Exchange Act of 1934, as amended (the "Exchange Act"):

            "On April 3, 2006, Mr. Mihaylo sent a letter (the "April 3 Letter")
     to the Board of Directors of Inter-Tel (the "Inter-Tel Board") proposing a
     meeting with the Inter-Tel Board to discuss a possible all-cash acquisition
     of Inter-Tel. Mr. Mihaylo stated in his letter that in connection with his
     review of alternatives, as described above in this Item 4, he has been
     discussing a possible arrangement between himself and Vector Capital
     (together with its affiliates, "Vector"), a technology-focused private
     equity fund with substantial experience investing in and acquiring
     technology companies, and that he and Vector have been meeting to discuss
     the possibility of together pursuing an acquisition of Inter-Tel and the
     manner in which that might best be effected. A copy of the April 3 Letter
     is filed as Exhibit 1 hereto and is incorporated herein by this reference.

            On April 7, 2006, in accordance with the advance notice bylaw
     provisions that Inter-Tel adopted on March 29, 2006, Mr. Mihaylo delivered
     to Inter-Tel an advance notice of business, and an advance notice of
     director nominations (such notices, the "Bylaw Advance Notices"), to be
     brought before the Annual Meeting. In the Bylaw Advance Notices, Mr.
     Mihaylo informed Inter-Tel that he intended (1) to nominate a slate of
     three directors (including himself) for election at the Annual Meeting (the
     "Director Nominations") and (2) to introduce at the Annual Meeting several
     resolutions to be submitted to the vote of the shareholders (the
     "Shareholder Proposals"). The Shareholder Proposals include a resolution
     urging the Inter-Tel Board to arrange for the prompt sale of Inter-Tel to
     the highest bidder and resolutions to repeal recent amendments to
     Inter-Tel's bylaws that could have the effect of discouraging offers to
     acquire Inter-Tel . Mr. Mihaylo delivered to Inter-Tel the Bylaw Advance
     Notices in order to preserve his ability to communicate directly with
     Inter-Tel's shareholders and to solicit their support for his proposal to
     seek a prompt sale of Inter-Tel.

         The Shareholder Proposals and the respective reasons therefor are set
forth below:

        Proposal 1:       RESOLVED, that the shareholders of Inter-Tel,
        ----------        Incorporated ("Inter-Tel") urge the Inter-Tel Board of
                          Directors to arrange for the prompt sale of Inter-Tel
                          to the highest bidder.

                          The reason for proposal 1 (the "Sell the Company
                          Resolution" proposal) is to give all shareholders the
                          opportunity to send a message to the Inter-Tel Board
                          that the shareholders support the sale of Inter-Tel to
                          the highest bidder.

        Proposal 2:       RESOLVED, that the amendments to Section 2.5 ("Special
        ----------        Meetings of Shareholders") of the Bylaws of Inter-Tel,
                          Incorporated adopted by the Board of Directors on
                          February 21, 2006 relating to the calling of a special
                          meeting of shareholders for the purpose of considering
                          any action to directly or indirectly facilitate a
                          "business combination" are hereby repealed.

        Proposal 3:       RESOLVED, that Section 2.12 ("Advance Notice of
        ----------        Shareholder Business") of the Bylaws of Inter-Tel,
                          Incorporated adopted by the Board of Directors on
                          March 29, 2006 is hereby repealed in its entirety.

        Proposal 4:       RESOLVED, that Section 2.13 ("Advance Notice of
        ----------        Director Nominations") of the Bylaws of Inter-Tel,
                          Incorporated adopted by the Board of Directors on
                          March 29, 2006 is hereby repealed in its entirety.

                          The reason for proposals 2, 3 and 4 (collectively, the
                          "Repeal the Bylaw Amendments Resolutions") is to give
                          all shareholders the opportunity to repeal the
                          amendments to Section 2.5 and to repeal in their
                          entireties Sections 2.12 and 2.13 of the Inter-Tel
                          Bylaws recently adopted by the Board of Directors. The
                          recent amendments to Section 2.5 and the adoption of
                          Sections 2.12 and 2.13 of the Bylaws could have the
                          effect of discouraging offers to acquire Inter-Tel.
                          Together with the Sell the Company Resolution, the
                          Repeal the Bylaw Amendments Resolutions would send a
                          strong message to the Inter-Tel Board that the
                          shareholders support the sale of Inter-Tel to the
                          highest bidder and that the Board of Directors should
                          not adopt amendments to the Bylaws that could
                          discourage offers to acquire Inter-Tel.

        Proposal 5:       RESOLVED, that the Bylaws of Inter-Tel, Incorporated
        ----------        are hereby amended to require the unanimous vote of
                          all members of the Board of Directors in order to
                          adopt any amendment to the Bylaws that could have an
                          anti-takeover effect, including, without limitation,
                          any advance notice requirements for the election of
                          directors or the conduct of business at shareholder
                          meetings or any change in the ability of shareholders
                          to call a special meeting of shareholders.

                          The reason for proposal 5 (the "Unanimous Vote
                          Resolution") is to prevent the Inter-Tel Board from
                          amending the Bylaws after the Annual Meeting to create
                          new obstacles to the sale of Inter-Tel to the highest
                          bidder or overturning the vote of the shareholders on
                          the Repeal the Bylaw Amendments Resolutions without
                          the unanimous vote of all members of the Inter-Tel
                          Board. If any of the director nominees proposed by Mr.
                          Mihaylo are elected at the Annual Meeting, then the
                          Inter-Tel Board may not be able to obtain a unanimous
                          vote on any such amendments, although the result of
                          any such vote would depend upon the exercise of each
                          such director's fiduciary duty at the time of the
                          vote. Based upon the number of shares that Mr. Mihaylo
                          beneficially owns and cumulative voting under Arizona
                          law, Mr. Mihaylo will be able to elect at least one
                          director at the Annual Meeting.

        Proposal 6:       RESOLVED, that each and every provision of the Bylaws
        ----------        of Inter-Tel, Incorporated adopted by the Board of
                          Directors after March 29, 2006, and prior to the
                          adoption of this resolution is hereby repealed.

                          The reason for proposal 6 (the "No Amendments
                          Resolution") is to prevent the Inter-Tel Board from
                          taking actions to amend the Bylaws to attempt to
                          nullify or delay the actions to be taken by the
                          shareholders at the Annual Meeting or to create new
                          obstacles to the sale of Inter-Tel to the highest
                          bidder. According to publicly available information,
                          the most recent amendments to the Bylaws were adopted
                          on March 29, 2006 and no amendments subsequent to that
                          date have been publicly disclosed. If the Inter-Tel
                          Board has adopted any amendments to the Bylaws since
                          March 29, 2006, or adopts any amendments to the Bylaws
                          prior the Annual Meeting, the No Amendments Resolution
                          would repeal all such amendments.

         MacKenzie Partners, Inc. ("MacKenzie") has been retained to assist in
the proxy solicitation, and Sitrick And Company Inc. ("Sitrick") has been
retained to provide public relations services.

         On April 10, 2006, Mr. Mihaylo sent a letter (the "April 10 Letter") to
the Inter-Tel Board to reaffirm his interest in meeting with the Inter-Tel Board
or its advisors to discuss a possible all-cash acquisition of Inter-Tel led by
Mr. Mihaylo, as expressed in the April 3 Letter. A copy of the April 10 Letter
is filed as Exhibit 2 hereto and is incorporated herein by this reference.

         Also on April 10, 2006, Mr. Mihaylo issued a press release announcing
that he had sent to the Inter-Tel Board the April 3 Letter and the April 10
Letter, and setting forth the text of the letters, and that he had delivered to
Inter-Tel the Bylaw Advance Notices. A copy of the press release is filed as
Exhibit 3 hereto and is incorporated herein by this reference.

         Mr. Mihaylo plans to file with the SEC, and mail to Inter-Tel's
shareholders, a proxy statement in connection with the Director Nominations and
The Shareholder Proposals. The proxy statement will include information with
respect to any other participants in the solicitation and a description of the
direct and indirect interests of Mr. Mihaylo and any other participants in the
solicitation. Investors are urged to read the proxy statement and any other
relevant documents when they become available because they will contain
important information. Investors will be able to obtain free copies of the proxy
statement (when available) and other documents that Mr. Mihaylo files with the
SEC through the web site maintained by the SEC at www.sec.gov. In addition,
investors will be able to obtain a copy of the proxy statement (when available)
from Mr. Mihaylo free of charge by contacting Mr. Mihaylo's proxy solicitor:
MacKenzie Partners, Inc., 105 Madison Avenue, New York, New York 10016, Tel:
212-929-5500, Fax: 212-929-0308, email: proxy@mackenziepartners.com."

                                    * * * * *



         Also on April 10, 2006, as stated in the Schedule 13D Amendment, Mr.
Mihaylo issued a press release announcing that he had sent to the Inter-Tel
Board the April 3 Letter and the April 10 Letter, and setting forth the text of
the letters, and that he had delivered to Inter-Tel the Bylaw Advance Notices.
The text of the press release, including the text of the April 3 Letter and the
April 10 Letter, is set forth below because such information could be viewed as
soliciting material under Regulation 14A of the Exchange Act:





FOR IMMEDIATE RELEASE:                                CONTACT:
                                                      Michael Sitrick
                                                      Terry Fahn
                                                      Sitrick And Company, Inc.
                                                      (310) 788-2850
                                                      Mike_Sitrick@sitrick.com





         INTER-TEL FOUNDER AND FORMER CHIEF EXECUTIVE STEVEN G. MIHAYLO
           INTERESTED IN MAKING AN ALL-CASH ACQUISITION OF INTER-TEL

   Notifies the Company of Intention to Wage a Proxy Contest at Annual Meeting

TEMPE, AZ - April 10, 2006 -Steven G. Mihaylo, the founder, former Chairman and
Chief Executive Officer and largest shareholder of Inter-Tel, Incorporated
(NasdaqNM: INTL), has requested that the Inter-Tel Board of Directors meet with
him to discuss a possible all-cash acquisition of the Company led by Mr.
Mihaylo.

Mr. Mihaylo's request to meet with the Inter-Tel Board was made in a call on
Friday March 31, 2006 and in letters to the Inter-Tel Board dated April 3 and
April 10, 2006. The letters were filed today with the Securities and Exchange
Commission (the "SEC") in an Amendment to the Schedule 13D that Mr. Mihaylo
filed with the SEC on March 6, 2006.

In his April 3rd letter, Mr. Mihaylo stated, "I am discussing a possible
arrangement between myself and Vector Capital . . . We have been meeting to
discuss the possibility of together pursuing an acquisition of the Company and
the manner in which that might best be effected," he wrote. "Together, we
believe that the best path forward for both ourselves and the Company's
shareholders is to work with you to negotiate an all-cash acquisition of the
Company."

The letter continued: "I take tremendous pride in the Company's accomplishments
to date, and feel deep personal gratitude toward the devoted employees, dealers
and customers that have supported the Company over the years. I am deeply
concerned, however, with the Company's ability to quickly and efficiently
complete the critical transition of its business from a circuit-switched model
to a converged, IP-centric model in an increasingly competitive marketplace.
This challenge is exacerbated by the costs and distractions associated with
maintaining the Company's publicly-traded status. I believe that the Company's
current shareholders will face many quarters, if not years, of volatility and
uncertainty during this transition."

"Vector and I are prepared to take on the risk associated with the transition of
the business and, at the same time, pay the other existing shareholders a
meaningful premium for their shares. Our strong preference is to work
cooperatively with the Board in this process and to immediately commence an
expedited and limited due diligence process. Although we may elect to proceed
even without the Board's cooperation, we anticipate that such cooperation and
access would result in a process that is mutually beneficial and would enable us
to pay the best price to the Company's shareholders.

"We believe that a sale of the Company at this time will maximize value for the
Company's shareholders and relieve them of the significant operational and
market risks that they would otherwise face going forward. As the Company's
founder and single largest shareholder, I strongly believe that our acquisition
of the Company is the best path for the Company during this critical, but risky,
transitional phase."

On Friday, April 7, 2006, Mr. Mihaylo also notified the Inter-Tel Board of
Directors that he intends to appear at Inter-Tel's May 31, 2006 Annual Meeting
of Shareholders in person or by proxy to, among other things, (i) nominate a
slate of three directors (including himself) for election at the Annual Meeting;
and (ii) introduce at the Annual Meeting several resolutions to be submitted to
the vote of the shareholders, including a resolution urging the Inter-Tel Board
to arrange for the prompt sale of the Company to the highest bidder and
resolutions to repeal recently adopted amendments to the Company's bylaws that
could have the effect of discouraging offers to acquire the Company.

In his April 10th letter, Mr. Mihaylo reaffirmed his interest in meeting with
the Inter-Tel Board of Directors to explore the possible acquisition of the
Company. In that letter he stated, "I continue to believe that the best path
forward for the Company's shareholders is for you to work with me cooperatively
to negotiate an all-cash acquisition of the Company by me, or a higher bidder,
and I remain interested in meeting with the Company's advisors to discuss such a
transaction."

The letter continued, "I believe that a cooperative process, which would enable
me and my financing sources to gain access to expedited and limited due
diligence, would result in a proposal that is mutually beneficial and could
enable us to offer significantly more value to the Company's shareholders than
one without such access. To expedite this process, I am prepared to sign a
confidentiality agreement containing reasonable provisions, but one which would
not inhibit or preclude my ability to make an offer directly to the Company or
its shareholders or to conduct my proxy solicitation."

The text of the April 3rd and April 10th letters is set forth below.



                                Steven G. Mihaylo
                                 P.O. Box 19790
                               Reno, Nevada 89511


                                                 April 3, 2006



VIA EMAIL AND OVERNIGHT COURIER
-------------------------------

Board of Directors of Inter-Tel, Incorporated
c/o Alex Cappello, Chairman
1615 South 52nd Street
Tempe, Arizona 85281

Dear Members of the Board of Directors:

         As indicated in the Schedule 13D that I filed on March 6, 2006, I have
been exploring various alternatives with respect to my ownership stake in
Inter-Tel, Incorporated (the "Company"). In that connection, I am discussing a
possible arrangement between myself and Vector Capital Corporation (together
with its affiliates, "Vector"), a technology-focused private equity fund with
substantial experience investing in and acquiring technology companies. We have
been meeting to discuss the possibility of together pursuing an acquisition of
the Company and the manner in which that might best be effected. Together, we
believe that the best path forward for both ourselves and the Company's
shareholders is to work with you to negotiate an all-cash acquisition of the
Company. We are writing to propose a meeting with the Company's Board of
Directors to discuss such a transaction.

         I take tremendous pride in the Company's accomplishments to date, and
feel deep personal gratitude toward the devoted employees, dealers and customers
that have supported the Company over the years. I am deeply concerned, however,
with the Company's ability to quickly and efficiently complete the critical
transition of its business from a circuit-switched model to a converged,
IP-centric model in an increasingly competitive marketplace. This challenge is
exacerbated by the costs and distractions associated with maintaining the
Company's publicly-traded status. I believe that the Company's current
shareholders will face many quarters, if not years, of volatility and
uncertainty during this transition.

         Vector and I are prepared to take on the risk associated with the
transition of the business and, at the same time, pay the other existing
shareholders a meaningful premium for their shares. Our strong preference is to
work cooperatively with the Board in this process and to immediately commence an
expedited and limited due diligence process. Although we may elect to proceed
even without the Board's cooperation, we anticipate that such cooperation and
access would result in a process that is mutually beneficial and would enable us
to pay the best price to the Company's shareholders.

         We believe that a sale of the Company at this time will maximize value
for the Company's shareholders and relieve them of the significant operational
and market risks that they would otherwise face going forward. As the Company's
founder and single largest shareholder, I strongly believe that our acquisition
of the Company is the best path for the Company during this critical, but risky,
transitional phase.

         We are eager to complete a transaction with the Company and look
forward to hearing from you soon. In light of your recent Form 8-K filing
regarding advance notice provisions that have been added to the Company's
bylaws, it is important that I hear back from you by 5:00 p.m., Pacific time, on
Wednesday, April 5. I can be reached at 775-338-4699 or at 602-738-9611 or by
email at stevemihaylo@cox.net or stevemihaylo@yahoo.com.

Sincerely,

/s/ Steven G. Mihaylo

Steven G. Mihaylo


cc:      Vector Capital Corporation (via email)
         Stephen M. Wurzberg  (via email)
         Robert G. Day  (via email)



                                Steven G. Mihaylo
                                 P.O. Box 19790
                               Reno, Nevada 89511


                                                April 10, 2006


VIA EMAIL AND OVERNIGHT COURIER
-------------------------------

Board of Directors of Inter-Tel, Incorporated
c/o Alex Cappello, Chairman
1615 South 52nd Street
Tempe, Arizona 85281

Dear Members of the Board of Directors:

         I am writing to reaffirm my interest in meeting with the Board of
Directors of Inter-Tel, Incorporated (the "Company"), or its advisors to discuss
a possible going-private transaction with the Company led by me, as expressed in
my April 3, 2006 letter to you.

         As you are aware, on Friday, April 7, 2006, as necessitated by the
advance notice bylaw provisions that you adopted on March 29, 2006, I delivered
to the Company an advance notice of business and an advance notice of director
nominations to be brought before the Annual Meeting of Shareholders scheduled
for May 31, 2006. In those notices, I stated, among other things, that I
intended (i) to nominate a slate of three directors (including myself) for
election at the Annual Meeting and (ii) to introduce at the Annual Meeting
several resolutions to be submitted to the vote of the shareholders, including a
resolution urging the Company's Board of Directors to arrange for the prompt
sale of the Company to the highest bidder. I took this action in order to
preserve my ability to communicate directly with the Company's shareholders and
to solicit their support for my proposal to seek a prompt sale of the Company.

         I continue to believe that the best path forward for the Company's
shareholders is for you to work with me cooperatively to negotiate an all-cash
acquisition of the Company by me, or a higher bidder, and I remain interested in
meeting with the Company's advisors to discuss such a transaction. I believe
that a cooperative process, which would enable me and my financing sources to
gain access to expedited and limited due diligence, would result in a proposal
that is mutually beneficial and could enable us to offer significantly more
value to the Company's shareholders than one without such access. To expedite
this process, I am prepared to sign a confidentiality agreement containing
reasonable provisions, but one which would not inhibit or preclude my ability to
make an offer directly to the Company or its shareholders or to conduct my proxy
solicitation.

         I look forward to hearing from you soon.

Sincerely,

/s/ Steven G. Mihaylo

Steven G. Mihaylo


cc:      Stephen M. Wurzberg  (via email)
         Robert G. Day  (via email)

Mr. Mihaylo plans to file with the SEC, and mail to Inter-Tel's shareholders, a
proxy statement in connection with the director nominations and the shareholder
proposals. The proxy statement will include information with respect to any
other participants in the solicitation and a description of the direct and
indirect interests of Mr. Mihaylo and any other participants in the
solicitation. Investors are urged to read the proxy statement and any other
relevant documents when they become available because they will contain
important information. Investors will be able to obtain free copies of the proxy
statement (when available) and other documents that Mr. Mihaylo files with the
SEC through the web site maintained by the SEC at www.sec.gov. In addition,
investors will be able to obtain a copy of the proxy statement (when available)
from Mr. Mihaylo free of charge by contacting Mr. Mihaylo's proxy solicitor:
MacKenzie Partners, Inc., 105 Madison Avenue, New York, New York 10016, Tel:
212-929-5500, Fax: 212-929-0308, email: proxy@mackenziepartners.com.

                                    * * * * *