UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                       PURSUANT TO SECTION 13 OR 15(D) OF
                       THE SECURITIES EXCHANGE ACT OF 1934


        Date of Report (Date of earliest event reported): JANUARY 1, 2000


                             INTER-TEL, INCORPORATED
               (Exact Name of Registrant as specified in charter)


                         Commission File Number 0-10211


               ARIZONA                                          86-0220994
     (State or other jurisdiction                            (I.R.S. Employer
           of incorporation)                              Identification Number)


   120 NORTH 44TH STREET, SUITE 200
            PHOENIX, ARIZONA                                    85034-1822
(Address of principal executive offices)                        (Zip Code)


       Registrant's telephone number, including area code: (602) 302-8900

ITEM 2. ACQUISITION OR DISPOSITION OF ASSETS

     On January 1, 2000,  Inter-Tel,  Incorporated (the "Company") completed its
acquisition  of the  computer  telephony  assets and  liabilities  of  Executone
Information  Systems,  Inc.  ("Executone")  for $44.3  million  in cash plus the
assumption of certain  liabilities,  subject to purchase price adjustments as of
the  closing  date.  Inter-Tel  intends  to  continue  distributing  Executone's
products through Executone's existing distribution  channel,  including National
and Government  Accounts,  and will begin distributing  Inter-Tel's products and
services through these channels as well.

     In connection with the  acquisition,  Inter-Tel  expects to take a one-time
charge for  purchased  in-process  research and  development  expenses and other
restructuring costs in the first quarter of 2000.

ITEM 7. FINANCIAL STATEMENTS, PRO FORMA FINANCIAL INFORMATION AND EXHIBITS

     (a) FINANCIAL STATEMENTS OF EXECUTONE INFORMATION SYSTEMS

     It is impracticable for the Company to provide financial statements for the
business acquired at this time. Such financial statements, if required, shall be
filed as soon as practicable,  but not later than sixty (60) days after the date
hereof.

     (b) PRO FORMA FINANCIAL INFORMATION

     It is  impracticable  for  the  Company  to  provide  pro  forma  financial
information  reflecting  the  Company's  acquisition  of the computer  telephony
assets and  liabilities  of  Executone  at this time.  Such pro forma  financial
information,  if required, shall be filed as soon as practicable,  but not later
than sixty (60) days after the date hereof.

     (c) EXHIBITS

          2.1  Computer  Telephony Asset Purchase  Agreement dated as of October
               17,  1999 by and between  Executone  Information  Systems,  Inc.,
               Inter-Tel,   Incorporated   and  Executone   Inter-Tel   Business
               Information Systems, Inc.

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                                    SIGNATURE

Pursuant  to the  requirements  of the  Securities  Exchange  Act of  1934,  the
Registrant  has duly  caused  this  report  to be  signed  on its  behalf by the
undersigned hereunto duly authorized.


                                        INTER-TEL, INCORPORATED


Dated: JANUARY 14, 2000                 BY: /s/ KURT R. KNEIP
                                            ------------------------------------
                                            KURT R. KNEIP,
                                            CHIEF FINANCIAL OFFICER

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