Document:

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.  

        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
      
      

    
	 	Its:	SVP      
      

      (CORPORATE SEAL)
    
	 	 
	 	 
	 	“TENANT”:

	 	 
	 	AMERICAN TELECONFERENCING SERVICES, LTD., 

      D/B/A PREMIERE GLOBAL SERVICES
	 	 
	 	By:	
      /s/ Michael Havener

      

    
	 	Name:	
      Michael Havener

      

    
	 	Title:	
      CFO
      

    
	 	 
		Attest:	
      /s/ Nicole M. Kamen

      

    
		Name:	
      Nicole M. Kamen

      

    
		Title:	
      VP
      

      (CORPORATE SEAL)

    

  2EXHIBIT 10.13 

ACKNOWLEDGMENT, CONSENT

AND REAFFIRMATION OF GUARANTOR OF LEASE  

        THIS
ACKNOWLEDGMENT, CONSENT AND REAFFIRMATION OF GUARANTOR OF LEASE (the “Consent”), is made
this 14th day of July, 2006, by PREMIERE GLOBAL SERVICES, INC. (“Guarantor”), to and for the
benefit of 3280 PEACHTREE I LLC (“Landlord”). 

WITNESSETH: 

        WHEREAS,
Guarantor did duly execute and deliver that certain Guaranty of Lease (the “Original
Guaranty”), on October 28,  2005, in connection with and as a material inducement for that
certain Lease Agreement, as may have been amended previously (the “Original Lease”),
involving Landlord and American Teleconferencing Services, Ltd. d/b/a Premiere Global
Services (“Tenant”). 

        WHEREAS,
Landlord and Tenant have entered into an amendment to the Original Lease (the “Lease
Amendment’), dated, July 14, 2006 subject to and conditioned upon the execution and delivery of
this Consent. 

        WHEREAS,
Landlord would not have entered into or agreed to the Lease Amendment, were it not for
the execution and delivery of this Consent to Landlord, which Consent was a material
inducement to Landlord to enter into the Lease Amendment. 

        WHEREAS,
Guarantor, which will derive material and substantial benefit from the Lease Amendment,
desires to provide this Consent, in connection with the Lease Amendment. 

        NOW
THEREFORE, for and in consideration of the mutual covenants contained herein, 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.
      Amendment to Lease. Guarantor hereby acknowledges and consents to the fact that the
Original Lease has been modified and amended by virtue of the Lease Amendment. 

        2.
      No Modification.  The granting of this Consent by Guarantor to Landlord and Tenant
in no way modifies or amends the Guaranty or any Guarantor’s obligations and duties under
the Guaranty. Said Guaranty is and shall remain in full force and effect and is a valid
and continuing obligation of Guarantor according to its terms. 

        3.
      Warranties and Representations. The warranties and representations made by
Guarantor in the Guaranty are made and ratified as of the date hereof with respect to
this Consent. 

        4.
      No Further Consent Required. The request made by Landlord herein and the giving of
this Consent by Guarantor shall in no way be or be deemed to be a waiver of Landlord’s
rights under the Guaranty. 

        5.
      Binding Nature. This Consent shall inure to the benefit of Landlord, Tenant and
their respective heirs, legal representatives, successors and assigns. 

        6.
      Georgia Law. This Consent has been given, and shall be construed under, the laws of
the State of Georgia. 

        IN
WITNESS WHEREOF, the undersigned have caused this Consent to be executed under seal and
delivered on the day and year first above written. 

	 	“Guarantor”
	 	 
	 	PREMIERE GLOBAL SERVICES, INC.
	 	 
	 	By:	
      /s/ Michael Havener

      

    
	  	
Its:
 	
      CFOEXHIBIT 10.14

SECOND AMENDMENT TO LEASE AGREEMENT

     THIS SECOND AMENDMENT TO LEASE AGREEMENT (the “Second Amendment”), is made this 15th day of March, 2007, by 3280 PEACHTREE I LLC (as “Landlord”) and AMERICAN TELECONFERENCING SERVICES,
LTD. DB/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 (consisting of all of the 9th floor) in that certain building
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 did enter into that certain First Amendment to Lease Agreement, dated as of July 31, 2006 (the “First Amendment”).

     WHEREAS, the Original Lease, as modified by the First Amendment, is herein collectively referred to as the Lease.

     WHEREAS, Landlord and Tenant desire to modify and amend the 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 Lease.

     2. Size of Demised Premises. The square feet of Rentable Floor Area of the Demised Premises, which was set forth in the Original Lease as 23,529 is and shall be, for the purposes of the Original Lease, 23,684
square feet of Rentable Floor Area. Floor plan measurements for the Building are as set forth on Exhibit “B”, attached hereto and by this reference incorporated herein.

     3. Building Size and Building Address. The square feet of Rentable Floor Area in the Building, which was set forth in the Original Lease as 582,049, is and shall be for the purposes of the Original Lease, 584,758
square feet of Rentable Floor Area. The address of the Building and the Building address for notices to Tenant is (in lieu of what is set forth in the Original Lease) 3280 Peachtree Road, NW, Atlanta, Georgia 30305-2422.

     4. Signage and Tenant’s Logotype. With respect to the Building monument signs described in Article 59.1 of the Original Lease, Tenant acknowledges that such signs are attached

to the Building, and are not free-standing. Tenant, together with Tenant’s Affiliate (leasing the 10th floor of the Building), have the right, in the aggregate, to one sign panel on one such sign.

     5. Operating Expenses; Bond Transaction. Landlord obtained an inducement resolution from the Development Authority of Fulton County (the “Authority”) which qualified the Project for the issuance by the
Authority of taxable revenue bonds to finance the acquisition of the Project by the Authority and the lease-back of the Project from the Authority to Landlord, and Landlord and the Authority have closed and consummated such taxable revenue bond
transaction. The taxable revenue bond financing transaction with the Authority required the expenditure by Landlord of significant transaction costs in connection with the closing thereof, including filing fees, inducement costs, publication costs,
bond issuance fees, bond validation fees, recording fees, attorney’s fees and expenses, and accounting and consultant fees and expenses, and has and will require the expenditure by Landlord of additional third-party costs and expenses during
the period that the taxable revenue bonds are outstanding, but such taxable revenue bond financing transaction will result in a significant reduction in the ad valorem taxes assessed against the Project during a period not to exceed ten (10) years.
Landlord and Tenant hereby agree that Operating Expenses under this Lease shall include amortization (calculated utilizing a reasonable rate of interest, whether or not such interest is actually incurred) of the actual third-party costs and expenses
incurred by Landlord in connection with Landlord’s obtaining the aforesaid inducement resolution from the Authority and the closing and consummation of the taxable revenue bond financing transaction, amortized over a period of ten (10) years
commencing on January 1 of the first year during which the ad valorem taxes assessed against the Project are reduced as a result of such taxable revenue bond financing transaction, and Operating Expenses for each year shall also include the costs of
legal and accounting services and other third-party costs incurred by Landlord during such year which would not have been incurred by Landlord but for the taxable revenue bond financing transaction; provided, however, the costs and expenses
(or amortized amounts thereof, as the case may be) included in Operating Expenses under this Article during any year shall in no event exceed the amount of the reduction in ad valorem taxes assessed against the Project for such year resulting from
the taxable revenue bond financing transaction.

     6. Ceiling Allowance and Ceiling Work. Landlord and Tenant agree that in lieu of any obligations on the part of Landlord to perform or provide any work on or for the ceiling within the Demised Premises, as set
forth in Paragraph 2(b) of Exhibit “D” to the Original Lease (and Landlord no longer has such obligations), Landlord shall provide an additional allowance to Tenant of One Hundred Eighty-Five Thousand Sixty-Two and No/100 Dollars
($185,062.00) . Such additional allowance shall be funded under the same conditions that the Construction Allowance is funded under the Original Lease.

     7. Consent of Guarantor. Tenant shall cause the guarantor of the Original Lease to execute and deliver to Landlord the Acknowledgement, Consent and Reaffirmation of Guarantor of Lease, attached hereto as
Exhibit “A”, 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.

2

     8. Work Within Fire Stairs. Tenant has requested that Tenant have the right to make certain improvements to the fire-stairs between the floors of the Demised Premises that it occupies in the Building (the “Stairwell Work”), and Landlord shall permit Tenant to do such Stairwell Work, subject to and conditioned upon the following terms and conditions:

     (a) Landlord shall have the right to approve the plans and specifications for such Stairwell Work;

     (b) Tenant shall be responsible for the cost of such Stairwell Work (which may be funded from the Construction Allowance, to the extent available), and for such Stairwell Work (as conducted and upon completion) being in compliance with all applicable codes, laws, ordinances and regulations, and any delay in achieving substantial compliance or acquiring a certificate of occupancy for the Demised Premises because of or in connection with such Stairwell Work shall be a Tenant Delay, and shall not delay or otherwise impact the Rental Commencement Date;

     (c) Landlord shall have the right to repair or replace (at Tenant’s sole cost and expense), if Landlord deems it necessary, in Landlord’s reasonable judgment, any of the Stairwell Work, after providing at least five (5) days prior notice to Tenant of such intent; and

     (d) Tenant shall be responsible for the cost of cleaning the stairwells and the Stairwell Work. Landlord shall arrange for such cleaning, through the Building janitorial service, and Landlord shall bill Tenant, and Tenant shall pay for, such cost as billed.

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

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

     11. Georgia Law. This Second Amendment shall be construed and interpreted under the laws of the State of Georgia.

     12. Time of Essence. Time is of the essence of this Second Amendment.

3

     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, 
	  	 	Member 
	  	  	By: 	/s/ Jack A. LaHue
      

    
	  	  	Its: 	Senior Vice President
      

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

    
	 	Name: 	Michael Havener 
	 	Title: 	Chief Financial Officer 
	 	 	 
	 	Attest:	/s/ Bobby Collett
      

    
	 	Name: 	Bobby Collett 
	 	Title: 	Vice President Corporate Real Estate 
	 	 	 
	 	 	(CORPORATE SEAL) 

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