Document:

Form of Senior Secured Promissory Note

 Exhibit 10.9 
 SENIOR SECURED PROMISSORY NOTE 
 (Term Note) 
  

			
	$15,000,000	  	December 4, 2006

 FOR VALUE RECEIVED, the
undersigned, VERTICAL COMMUNICATIONS, INC., a Delaware corporation (“VCI”), and VERTICAL COMMUNICATIONS ACQUISITION
CORP., a Delaware corporation (“VCAC” and together with VCI, the “Borrowers” and each a “Borrower”), jointly and severally promise to pay to the order of NEIPF, L.P.
(“Lender”) or its permitted assigns, in lawful money of the United States of America and in immediately available funds, the principal sum of Fifteen Million Dollars ($15,000,000), together with interest thereon as set out
herein, at its offices or such other place as Lender may designate in writing. 
 1. Credit Agreement. This Senior Secured Promissory
Note (this “Note”) is subject to the terms of a certain Credit Agreement dated October 16, 2006 by and among Borrowers, Lender and certain other parties named therein (as the same may be amended, restated, modified or supplemented
from time to time, the “Credit Agreement”) and is the “Term Note” referred to in Section 1.1(b) thereof. Lender is entitled to the benefits of the Credit Agreement and all of the exhibits thereto, and reference is made
thereto for a description of all rights and remedies thereunder. Neither reference to the Credit Agreement, nor any provision thereof or security for the other obligations evidenced hereby, shall affect or impair the absolute and unconditional,
joint and several, obligations of Borrowers to pay the principal amount hereof, together with all interest accrued thereon, any applicable Payment Premium (as defined in the Credit Agreement) and expenses, when due. Capitalized terms used herein and
not otherwise defined shall have the meanings set forth in the Credit Agreement. 
 2. Interest Rate; Payment Premium Payments;
Prepayments. 
 2.1 From the date of disbursement of funds until such time as all principal, interest and other amounts outstanding
hereunder are unconditionally and irrevocably paid and performed in full, interest shall accrue on the unpaid principal amount at the rate specified in Section 1.3 of the Credit Agreement. Upon any payment or prepayment of any or all of the
principal due hereunder, a Payment Premium shall also be due and payable pursuant to Section 1.4 of the Credit Agreement on the basis set forth therein. Payments of interest, principal, any applicable Payment Premium and any prepayments
hereunder shall be made in accordance with the Credit Agreement. 
 2.2 Other Payment Provisions. Borrowers shall make each payment
hereunder not later than 2:00 P.M. (Eastern time) on the day when due, without offset, in lawful money of the United States of America to Investment Manager, for the benefit of Lender, in same day funds at Investment Manager’s offices or
pursuant to a wire transfer to Lender’s designated bank account, which shall initially be:                     . All payments will be
applied in accordance with the terms of the Credit Agreement. If the date for any payment or prepayment hereunder falls on a 
  

 1. 

 day which is not a Business Day, then for all purposes of this Note the same shall be deemed to have fallen on the next
following Business Day, and such extension of time shall in such case be included in the computation of payments of interest. 
 3.
Maturity Date. All of the amounts due hereunder including the entire principal amount then-outstanding, all accrued and unpaid interest thereon and all other Obligations and any applicable Payment Premium, shall be due and payable on
December 4, 2009 (the “Maturity Date”) or such earlier date as such maturity may be accelerated pursuant to the terms hereof and as provided in the Credit Agreement. 
 4. Collateral. This Note is secured by the Collateral under the terms of the Security Agreement and the other Collateral Documents.

 5. Assignment. There shall be no assignment or transfer of this Note or any Borrower’s obligations hereunder except as
set forth in the Credit Agreement, and any purported assignment or transfer in contravention thereof shall be invalid. Lender may assign its rights hereunder in accordance with the terms of the Credit Agreement, including, without limitation, in
connection with a syndication, participation or securitization. 
 6. Default and Remedies. The occurrence of an Event of Default
under the Credit Agreement shall constitute a default hereunder and shall entitle Lender and Investment Manager to exercise the rights and remedies specified in the Credit Agreement and the various Loan Documents, as well as those available at law
or in equity. These rights and remedies include, but are not limited to, the right to accelerate the maturity of this Note and to sell or otherwise dispose of any or all of the Collateral by public or private sale; in each case, subject to and in
accordance with the Credit Agreement and the other Loan Documents. 
 7. Miscellaneous. 
 7.1 No Usury. This Note is subject to the express condition that at no time shall any Borrower be obligated or required to pay interest hereunder
at a rate which could subject Lender to either civil or criminal liability as a result of being in excess of the maximum rate which borrowers are permitted by law to contract or agree to pay. If, by the terms of this Note, any Borrower is at any
time required or obligated to pay interest at a rate in excess of such maximum rate, the rate of interest hereunder shall be deemed to be immediately reduced to such maximum rate and interest payable hereunder shall be computed at such maximum rate
and the portion of all prior interest payments in excess of such maximum rate shall be applied and shall be deemed to have been payments in reduction of the principal balance of this Note. 
 7.2 Controlling Law. This Note shall be construed in accordance with and governed by the laws of the State of New York, without regard to its
principles of conflicts of law. Venue for any adjudication hereof shall be only in the courts of the State of New York, the jurisdiction of such courts each Borrower hereby consents to as the agreement of the parties, as not inconvenient and as not
subject to review by any court other than such courts in the State of New 

 York. Each Borrower intends that the courts of the jurisdiction in which such Borrower is incorporated and conducts
business should afford full faith and credit to any judgment rendered by a court of the State of New York against such Borrower, and should hold that the State of New York courts have jurisdiction to enter a valid, in personam judgment
against such Borrower. Each Borrower agrees that service of any summons or complaint, and other process which may be served in any action, may be made by mailing via registered mail or delivering a copy of such process to such Borrower, and each
Borrower hereby agrees that this submission to jurisdiction and consent to service of process are reasonable and made for the express benefit of Lender and Investment Manager. 
 7.3 Waiver of Notice and Presentment. Each Borrower hereby waives presentment, demand, notice, protest, stay of execution, and all other defenses
to payment generally, in each case to the extent permitted or not otherwise prohibited by applicable law, assents to the terms hereof, and agrees that any renewal, extension, or postponement of the time for payment or any other indulgence or any
substitution, exchange, or release of collateral may be affected without notice to and without releasing any Borrower from any liability hereunder. 
 7.4 No Rescission Right or Set-Off. This Note is not subject to any valid right of rescission, set-off, abatement, diminution, counterclaim or defense as against Lender or Investment Manager, including the defense of usury, in each
case to the extent permitted or not otherwise prohibited by applicable law, and the operation of any of the terms of the loan, or the exercise of any right thereunder, will not render this Note unenforceable, in whole or in part, or subject to any
right of rescission, set-off, abatement, diminution, counterclaim or defense, including the defense of usury, in each case to the extent permitted or not otherwise prohibited by applicable law, and Lender has not taken any action which would give
rise to the assertion of any of the foregoing and no such right of rescission, set-off, abatement, diminution, counterclaim or defense, including the defense of usury, has been asserted with respect thereto. 
 7.5 Severability. The invalidity, illegality, or unenforceability in any jurisdiction of any provision under this Note shall not affect or impair
the remaining provisions in this Note. Furthermore, in lieu of any such provision, there shall be added automatically as part of the applicable agreement a legal and enforceable provision as similar in terms to such provision as may be possible.

 IN WITNESS WHEREOF, the undersigned has duly caused
this Note to be executed and its seal, if any, affixed as of the date first set forth above. 
  

			
	VERTICAL COMMUNICATIONS, INC.
		
	By:	 	 /s/ WILLIAM Y. TAUSCHER

	Name:	 	William Y. Tauscher
	Title:	 	Chief Executive Officer and President
	
	VERTICAL COMMUNICATIONS ACQUISITION CORP.
		
	By:	 	 /s/ WILLIAM Y. TAUSCHER

	Name:	 	William Y. Tauscher
	Title:	 	Chief Executive Officer and PresidentJoinder Agreement

 Exhibit 10.10 
 JOINDER AGREEMENT 
 On this December 4th, 2006, for good and
valuable consideration received, VODAVI TECHNOLOGY, INC., a Delaware corporation (“Vodavi”), hereby acknowledges and agrees that, upon the execution and delivery of this
Joinder Agreement, it shall for all purposes be joined to (i) that Credit Agreement dated as of October 16, 2006 by and among VERTICAL COMMUNICATIONS, INC., a
Delaware corporation (“VCI”), Vertical Communications Acquisition Corp., a Delaware corporation (“VCAC” and together with VCI, the “Borrowers” and each a
“Borrower”), and Columbia Partners, L.L.C. Investment Management, as agent and investment manager (“Investment Manager”), for the benefit of itself and NEIPF, L.P. (“Lender”);
(ii) the Notes, (iii) the Security Agreement and (iv) the Intellectual Property Security Agreement ((i) through (iv) above, collectively, the “Joined Documents” and, each individually, a “Joined
Document”)). All of the terms used herein but not otherwise defined shall have the definitions given to them in the Credit Agreement. 
 1.
ASSUMPTION OF OBLIGATIONS. Vodavi hereby assumes and agrees to be liable for the payment and performance of the Obligations under the Joined Documents and with respect to
the Loans, agrees to be bound by, and comply with, all of the terms and conditions of the Joined Documents in each and every case all as if Vodavi was a Borrower under the Credit Agreement and each of the other Loan Documents as of the initial
effectiveness of each such Joined Document. Without limiting the generality of the provisions of this paragraph, Vodavi hereby agrees that it is, and will be, liable for the payment and performance of the Loans, and all other Obligations, in each
case incurred prior to the date hereof under the Credit Agreement and each of the other Loan Documents, including without limitation, all interest and Payment Premium on the Loans and all fees, costs and expenses to be paid under the Credit
Agreement and each of the other Loan Documents. 
 2. GRANT OF SECURITY
INTEREST. As security for the full, prompt and complete payment and performance of each of the Obligations when due (whether at stated maturity, by acceleration or otherwise), Vodavi hereby grants to
Investment Manager, for the benefit of the Lender, a continuing security interest in all of its right, title and interest in and to (i) the Collateral, whether now owned or hereafter acquired, subject only to Permitted Encumbrances in
accordance with and as more fully set forth in the Security Agreement and (ii) the Intellectual Property, whether now owned or hereafter acquired, in accordance with and as more fully set forth in the Intellectual Property Security Agreement.

 3. ACKNOWLEDGEMENT OF PLEDGE. Vodavi hereby acknowledges receipt of a
copy of that certain pledge agreement dated of even date herewith executed by VCI in favor of Investment Manager, for the benefit of Lender (the “New Pledge”). Vodavi agrees promptly to note on its books the security
interests granted under the New Pledge, and waives any rights or requirement at any time hereafter to receive a copy of such New Pledge in connection with the registration of any Pledged Collateral (as defined in each New Pledge) in the name of
investment Manager, for the benefit of Lender or its nominee or the exercise of voting rights by Investment Manager, for the benefit of Lender. 
  

 1 

 4. ATTORNEY-IN-FACT. Vodavi hereby appoints Investment Manager as its
attorney-in-fact, in its name, and on its behalf, for all of the purposes for which the Borrower heretofore appointed Investment Manager as its attorney-in-fact under the Joined Documents. This power is coupled with an interest and is irrevocable so
long as any Obligations remain outstanding. This appointment may be discharged by any officer or attorney of such attorney-in-fact. 
 5.
REPRESENTATIONS AND WARRANTIES. Vodavi represents and warrants that (a) the representations and warranties of the Borrowers in the Joined Documents continue to be true and complete in all
material respects as of the date hereof after giving effect to this Joinder Agreement, except to the extent such representations and warranties specifically relate to another date, (b) the execution, delivery and performance of this Joinder
Agreement are duly authorized, do not require the consent or approval of any governmental body or regulatory authority and are not in contravention of or in conflict with any law or regulation or any term or provision of any other agreement entered
into by Vodavi and (c) after giving effect to this Joinder Agreement, no event has occurred and is continuing or would result from the execution, delivery or performance of this Joinder Agreement which constitutes an Event of Default.

 [SIGNATURE PAGE FOLLOWS] 
  

 2 

 IN WITNESS WHEREOF, the parties have executed this Joinder Agreement the day and year first above
written. 
  

			
	VODAVI TECHNOLOGY, INC.
		
	By:	 	  

	Name:	 	
	Title:	 	
	
	 COLUMBIA PARTNERS, L.L.C. INVESTMENT MANAGEMENT,
 as Investment Manager

		
	By:	 	  

	Name:	 	  

	Title:	 	  

	
	NEIPF, L.P., as Lender
	
	 By: Columbia Partners, L.L.C. Investment Management,
 its Authorized Signatory

		
	By:	 	  

	Name:	 	  

	Title:	 	  

 Signature Page to Joinder Agreement 

			
	Agreed to and acknowledged
	intending to be legally bound hereby:
	
	VERTICAL COMMUNICATIONS, INC.
		
	By:	 	 /s/ WILLIAM Y. TAUSCHER

	Name:	 	William Y. Tauscher
	Title:	 	Chief Executive Officer and President
	
	VERTICAL COMMUNICATIONS ACQUISITION CORP.
		
	By:	 	 /s/ WILLIAM Y. TAUSCHER

	Name:	 	William Y. Tauscher
	Title:	 	Chief Executive Officer and President

 Signature Page to Joinder Agreement

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