EXHIBIT 10.12

FIRST AMENDMENT TO LEASE AGREEMENT

        THIS FIRST AMENDMENT TO LEASE AGREEMENT (the “First Amendment”), is made
this 14th day of July, 2006, by 3280 PEACHTREE I LLC (as “Landlord”) and
AMERICAN TELECONFERENCING SERVICES, LTD., D/B/A PREMIERE GLOBAL SERVICES (as
“Tenant”).

W I T N E S S E T H:

        WHEREAS, Landlord and Tenant did enter into that certain Lease
Agreement, dated as of October 28, 2005 (the “Original Lease”), for space in
that certain building known as “Terminus 100”, located at 3280 Peachtree Road,
Atlanta, Georgia (the “Building”), as such space is more particularly described
in the Original Lease (the “Demised Premises”).

        WHEREAS, Landlord and Tenant desire to modify and amend the Original
Lease, in the manner and for the purposes herein set forth.

        NOW, THEREFOR, for and in consideration of the mutual premises, and for
Ten and No/100 Dollars ($10.00) and other good and valuable consideration, paid
by the parties hereto to one another, the receipt and sufficiency of which are
acknowledged by the parties hereto, the parties hereto hereby covenant and agree
as follows:

        1. Defined Terms. All capitalized terms not defined herein shall have
the same meaning as set forth in the Original Lease.

        2. Construction Matters. Notwithstanding the terms of the Original
Lease, Tenant has instructed that Landlord select and use, and Landlord shall
select and use, as the general contractor for performing tenant finish work in
the Demised Premises, Humphries and Company General Contractors (“Humphries”).
Landlord, upon the direction and at the request of Tenant, will not bid such
work, as required under the Original Lease, to any other contractor. Once
Humphries has provided a final price for the tenant finish work for the Demised
Premises, Landlord shall provide such price to Tenant, for Tenant’s approval.

        3. No Other Modifications. Except as expressly modified herein, the
Original Lease shall remain in full force and effect and, as modified herein, is
expressly ratified and confirmed by the parties hereto.

        4. Legal Representatives, Successors and Assigns. This First Amendment
shall be binding upon and shall inure to the benefit of Landlord and Tenant and
their respective legal representatives, successors and assigns.

        5. Georgia Law. This First Amendment shall be construed and interpreted
under the laws of the State of Georgia.

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        6. Time of Essence. Time is of the essence of this First Amendment.

        7. Consent of Guarantor. Tenant shall cause the guarantor of the
Original Lease to execute and deliver to Landlord the Acknowledgement and
Consent of Guarantor, attached hereto as Exhibit “B”, by this reference
incorporated herein, with the execution and delivery of this First Amendment.
The delivery of this document is a material inducement to Landlord, without
which Landlord would not have executed and delivered this First Amendment.

        IN WITNESS WHEREOF, the parties have hereunto set their hands and seals
as of the day, month and year first above written.

  “LANDLORD”:       3280 PEACHTREE I LLC,   a Georgia limited liability company
      By: Cousins Properties Incorporated, a Georgia corporation, managing
member         By: /s/ John S. McCall

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  Its: SVP

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(CORPORATE SEAL)           “TENANT”:       AMERICAN TELECONFERENCING SERVICES,
LTD.,
D/B/A PREMIERE GLOBAL SERVICES       By: /s/ Michael Havener

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  Name: Michael Havener

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  Title: CFO

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    Attest: /s/ Nicole M. Kamen

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Name: Nicole M. Kamen

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Title: VP

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(CORPORATE SEAL)

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