<PAGE>

                                                                    Exhibit 10.8

Consulting Agreement (this "Agreement") made this 21st day of January 2003
between Wire One Technologies, Inc., a Delaware corporation having its principal
office at 225 Long Avenue, Hillside, New Jersey 07205 (hereinafter "Wire One"),
and Kelly Harman, 7605 Croydon Place, Manassas, VA 20109 (hereinafter
"Consultant").

Whereas, Consultant is currently employed by Wire One as Vice President -
Marketing under an agreement dated January 2, 2001, as amended July 30, 2002
(collectively, the "Employment Agreement");

Whereas, Consultant and Wire One have determined it to be in their mutual best
interests to terminate the term of the Employment Agreement, simultaneous with
the commencement of Consultant's engagement as a consultant.

Now Therefore, in consideration of their mutual promises made herein, and for
other good and valuable consideration, the parties hereby agree as follows:

1.   Termination of Term of Employment Agreement; Commencement of Consultancy
     Term. (a) The term of the Employment Agreement shall terminate on January
     31, 2003 (the "Employment Agreement Termination Date"). Consultant
     acknowledges that she shall not, either upon or otherwise by virtue of such
     termination, become entitled to receive any severance compensation of any
     nature whatsoever. (b) The term of Consultant's services under this
     Agreement (the "Consultancy Term") shall commence upon the day following
     the Employment Agreement Termination Date and shall, subject to Paragraph 5
     below, terminate on December 31, 2003.

2.   Consultant Services. Consultant shall assist Wire One's management in the
     development, marketing and sales of the products and services offered from
     time to time by Wire One, including participation in (a) the preparation of
     marketing materials for such products and services, (b) the training of
     Wire One's sales force and independent sales agents with respect to such
     products and services and (c) the Company's public relations efforts.
     Consultant shall be available to Wire One at least 20 hours per week for
     her performance of services under this Agreement and shall devote first
     priority to her responsibilities to Wire One among all of her professional
     responsibilities.

<PAGE>


3.   Compensation. As compensation for Consultant's services under this
     Agreement, Wire One shall (a) pay Consultant a cash fee, with respect to
     each calendar month of the Consultancy Term, in the amount of $8,000 per
     month (the "Cash Fee"), payable on the fifteenth day of each such month,
     and (b) permit Consultant to retain the stock options granted to her during
     her employment by Wire One, provided that the vesting of such stock options
     shall cease upon any termination of the Consultancy Term in accordance with
     Paragraph 5 below. Consultant's rights as an optionee shall continue to be
     governed by the terms of the associated stock option agreements currently
     in effect and the 2000 Stock Incentive Plan. Wire One shall, in addition to
     Consultant's compensation, reimburse Consultant for any reasonable expenses
     incurred by Consultant in the performance of her duties under this
     agreement, upon submission of evidence thereof reasonably satisfactory to
     Wire One.

4.   Information; Work Product. From time to time as requested by Consultant,
     Wire One shall furnish to Consultant any information that is reasonably
     required to enable Consultant to perform her duties under this agreement.
     Consultant shall not disclose any confidential information furnished to her
     by Wire One unless, and then only to the extent that, such disclosure is
     legally required. Any compilation of data, work product, work of authorship
     and other materials created or produced by Consultant within the scope of
     her duties under this agreement shall be the sole and exclusive property of
     Wire One.

5.   Consultant's Other Endeavors. Wire One acknowledges that Consultant plans
     to pursue employment or consultancy engagements by parties other than Wire
     One ("Other Endeavors") and that Consultant shall (subject to the final
     sentence of Paragraph 2 above) have the unrestricted right to pursue Other
     Endeavors, whether or not any such Other Endeavor results in a conflict of
     interest with the interests of Wire One (a "Conflict"). If Consultant
     secures any Other Endeavor (of which Consultant shall promptly notify Wire


<PAGE>



     One, for purposes of both this Paragraph 5 and of Paragraph 1 (b) above),
     (a) Consultant shall have the right to terminate the Consultancy Term
     effective upon not less than ten days' prior written notice to Wire One and
     (b) if Wire One reasonably determines that such Other Endeavor results in a
     Conflict, Wire One shall have the right to terminate the Consultancy Term
     effective upon not less than ten days' prior written notice to Consultant;
     without limitation of the foregoing, Consultant acknowledges that any Other
     Endeavor that entails her participation in the training of any members of
     the sales force of any other organization (whether manufacturer, dealer or
     otherwise) in the video communications industry shall, unless otherwise
     agreed in writing by Wire One, result in a Conflict. In the event of any
     such termination, the Cash Fee for the calendar month within which such
     termination becomes effective shall be adjusted pro rata to reflect the
     resulting partial calendar month of the Consultancy Term (it being
     understood that, if Consultant has already received payment of the full
     Cash Fee for such calendar month, Consultant shall refund to Wire One a pro
     rata portion thereof corresponding to the portion of such month remaining
     following the effective date of such termination).

6.   Miscellaneous. This agreement is made in the State of New Jersey and shall
     be governed by New Jersey law. This agreement constitutes the entire
     agreement, and shall supersede any prior or contemporaneous agreement, oral
     or written, between the parties hereto regarding Consultant's services to
     Wire One as an employee or consultant following the Employment Agreement
     Termination Date (it being understood that the provisions of the Employment
     Agreement that survive the termination of the "Employment Period"
     thereunder shall remain in full force and effect) and may not be modified
     or amended except by a written document signed by the party against whom
     enforcement is sought. The relationship of Consultant to Wire One is solely
     that of independent contractor and nothing herein shall be deemed to place
     the parties in any other or different relationship, including but not
     limited to


<PAGE>


     that of employer-employee, principal-agent, or as partners in a joint
     venture. This agreement may be signed in more than one counterpart, in
     which case each counterpart shall constitute an original of this agreement.

IN WITNESS WHEREOF, the parties have signed this agreement as of the day and
year first above written.

                                   WIRE ONE TECHNOLOGIES, INC.

                                   By: /s/
                                       ----------------------------------------



                                   /s/
                                   --------------------------------------------
                                                     Kelly Harman