Document:

Form of Warrant to purchase shares of the Company's Common Stock

 Exhibit 4.9 
 THIS WARRANT HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD, TRANSFERRED OR OTHERWISE DISPOSED OF EXCEPT PURSUANT TO AN EFFECTIVE
REGISTRATION STATEMENT OR EXEMPTION FROM REGISTRATION UNDER THE FOREGOING LAWS. 
 THIS WARRANT SHALL BE VOID AFTER 5:00 P.M. EASTERN TIME ON
FEBRUARY 9, 2016 (the “EXPIRATION DATE”). 
 No. 2006- 
 ARTISOFT, INC. 
 WARRANT TO PURCHASE
SHARES OF COMMON STOCK 
 FOR VALUE RECEIVED, [WARRANTHOLDER] (“Warrantholder”), is entitled to purchase, subject to the
provisions of this Warrant To Purchase Shares of Common Stock (the “Warrant”), from Artisoft, Inc., a Delaware corporation (“Company”), at any time not later than 5:00 P.M., Eastern time, on the Expiration Date (as
defined above), at an initial exercise price per share equal to $0.01 (such price and such other price as shall result, from time to time, from the adjustments specified in Section 8 hereof is herein referred to as the “Warrant
Price”), [NUMBER OF] (such number and such other number as shall result, from time to time, from the adjustments specified in Section 8 hereof is herein referred to as the “Warrant Shares”) of Common Stock (as
defined below). The number of Warrant Shares purchasable upon exercise of this Warrant and the Warrant Price shall be subject to adjustment from time to time as described herein. As used herein, “Common Stock” means the common
stock, $0.01 par value per share, of the Company, and any capital stock of any class of the Company hereafter authorized that shall not be entitled to a fixed sum in respect of the rights of the holders thereof to participate in dividends or in the
distribution of assets upon the voluntary or involuntary liquidation, dissolution or winding up of the Company. This Warrant is one of the several warrants (collectively, the “February 2006 Warrants”) evidencing the right to
purchase shares of Common Stock issued pursuant to that certain Securities Purchase Agreement dated as of February 9, 2006 by and among the Company, the Warrantholder and the other parties thereto (as such agreement is amended and/or restated
and in effect from time to time, the “2006 Purchase Agreement”). 
 1. Registration. The Company shall maintain books
for the transfer and registration of the Warrant. Upon the initial issuance of the Warrant, the Company shall issue and register the Warrant in the name of the Warrantholder. 
 2. Transfers. As provided herein, this Warrant may be transferred only pursuant to a registration statement filed under the Securities Act of
1933, as amended (“Securities Act”), or an exemption from such registration. Subject to such restrictions, the Company shall transfer this Warrant from time to time upon the books to be maintained by the Company for that purpose,
upon surrender thereof for transfer properly endorsed or accompanied by appropriate instructions for transfer and such other documents as may be reasonably required by the Company to establish that such transfer is being made in accordance with the
terms hereof, and a new Warrant shall be issued to the transferee and the surrendered Warrant shall be canceled by the Company. 

 Warrant – Page 2 
 3. Exercise of Warrant. 
 (a) Subject to the provisions hereof, the Warrantholder may exercise this
Warrant in whole or in part at any time upon surrender of the Warrant, together with delivery of the duly executed Warrant exercise form attached hereto as Appendix A (the “Exercise Agreement”) and payment by cash,
certified check or wire transfer of funds (or by cash-less exercise as provided in Section 17) for the Warrant Price for that number of Warrant Shares then being purchased, to the Company during normal business hours on any business day
at the Company’s principal executive offices (or such other office or agency of the Company as it may designate by notice to the holder hereof). The Warrant Shares so purchased shall be deemed to be issued to the holder hereof or such
holder’s designee, as the record owner of such shares, as of the close of business on the date on which this Warrant shall have been surrendered (or evidence of loss, theft or destruction thereof and security or indemnity reasonably
satisfactory to the Company), the Warrant Price shall have been paid, the completed Exercise Agreement shall have been delivered and, in the case of any transfer of Warrant Shares effected at the time of such exercise, an appropriately executed
stock power and a certificate containing such reasonable and appropriate customary representations as may be reasonably requested by the Company shall have been delivered to the Company. Certificates for the Warrant Shares so purchased, representing
the aggregate number of shares specified in the Exercise Agreement, shall be delivered to the holder hereof within a reasonable time, not exceeding three (3) business days, after this Warrant shall have been so exercised. The certificates so
delivered shall be in such denominations as may be requested by the holder hereof and shall be registered in the name of such holder or, subject to compliance with applicable law, such other name as shall be designated by such holder. If this
Warrant shall have been exercised only in part, then, unless this Warrant has expired, the Company shall, at its expense, at the time of delivery of such certificates, deliver to the holder a new Warrant representing the number of shares with
respect to which this Warrant shall not then have been exercised. 
 (b) Each exercise hereof shall constitute the re-affirmation by the
Warrantholder that the representations and warranties contained in Sections 5.2, 5.3 and 5.4 of the 2006 Purchase Agreement are true and correct in all material respects with respect to the Warrantholder as of the time of such exercise. 

4. Compliance with the Securities Act. The Company may cause the legend set forth on the first page of this Warrant to be set forth on each
Warrant or similar legend on any security issued or issuable upon exercise of this Warrant, unless counsel for the Company is of the opinion as to any such security that such legend is unnecessary. 
 5. Payment of Taxes. The Company will pay any documentary stamp taxes attributable to the initial issuance of Warrant Shares issuable upon the
exercise of the Warrant; provided, however, that the Company shall not be required to pay any tax or taxes which may be payable in respect of any transfer involved in the issuance or delivery of any certificates for Warrant Shares in a
name other than that of the registered holder of this Warrant in respect of which such shares are issued, and in such case, the Company shall not be required to issue or deliver any certificate for Warrant Shares or any Warrant until the person
requesting the same has paid to the Company the amount of such tax or has established to the Company’s reasonable satisfaction that such tax has been paid. The holder shall be responsible for income and gift taxes due under federal, state or
other law, if any such tax is due. 
 6. Mutilated or Missing Warrants. In case this Warrant shall be mutilated, lost, stolen, or
destroyed, the Company shall issue in exchange and substitution of and upon cancellation of the mutilated Warrant, or in lieu of and substitution for the Warrant lost, stolen or destroyed, a new Warrant of like tenor and for the purchase of a like
number of Warrant Shares, but only upon receipt of evidence reasonably satisfactory to the Company of such loss, theft or destruction of the Warrant, and with respect to a lost, stolen or destroyed Warrant, reasonable indemnity or bond with respect
thereto, if requested by the Company. 

 Warrant – Page 3 
 7. Reservation of Common Stock. The Company shall use its best efforts to, as soon as practicable, amend its certificate of incorporation to increase the number of shares of Common Stock authorized but unissued
sufficient to allow reservation of all shares required to be reserved under the Warrant, and the Company shall thereafter at all applicable times keep reserved until issued (if necessary) as contemplated by this Section 7, out of the
authorized and unissued Common Stock, sufficient shares to provide for the exercise of the rights of purchase represented by the Warrant in compliance with its terms. The Company agrees that all Warrant Shares issued upon exercise of the Warrant
shall be, at the time of delivery of the certificates for such Warrant Shares upon payment in full of the Warrant Price therefor in accordance with the terms of this Warrant (or by cash-less exercise as provided below), duly authorized, validly
issued, fully paid and non-assessable shares of Common Stock of the Company. 
 8. Adjustments to Warrant Price and Warrant Shares.
Subject and pursuant to the provisions of this Section 8, the Warrant Price and number of Warrant Shares subject to this Warrant shall be subject to adjustment from time to time as set forth hereinafter. 
 a. If and whenever after the Original Issue Date (as defined below) the Company shall issue Additional Shares of Common Stock (as defined below) or is
otherwise deemed to issue Additional Shares of Common Stock (including, without limitation, the issuance or deemed issuance of Options (as defined below) and Convertible Securities (as defined below), in either case, without consideration or for a
consideration per share less than the Conversion Price (as defined below) (such transaction is referred to as a “Triggering Transaction”), then forthwith upon such Triggering Transaction, the number of Warrant Shares shall, subject
to and in accordance with the applicable provisions of this Section 8, be increased to the number of Warrant Shares (calculated to the nearest whole share of Common Stock) determined as follows: 
  

			
	W = W +	  	 [N – (T x N ÷ E)] x W ÷ [O + (T x N ÷
E)]

		  	1 – {W ÷ [O + (T x N ÷ E)]}

 Where: 
 “O” shall mean the number of (i) shares of Common Stock and (ii) shares of Common Stock issuable upon
conversion or exercise of Convertible Securities, in each case, outstanding immediately prior to the Triggering Transaction. 
 “E” shall mean the Conversion Price. 
 “W” shall mean the number of Warrant Shares
immediately prior to the Triggering Transaction. 
 “N” shall mean the number of new shares of Common Stock
issued and/or deemed to be issued in connection with the Triggering Transaction. 
 “T” shall mean the
aggregate consideration and/or deemed consideration paid per share of Common Stock issued or issuable as a result of the Triggering Transaction. 
 “W” shall mean the adjusted number of Warrant Shares pursuant to this Section 8. 

 Warrant – Page 4 
 By way of example only, if (i) the Company has 1,000,000 shares of Common Stock and shares of Common Stock issuable upon conversion
or exercise of Convertible Securities outstanding immediately prior to a Triggering Transaction (O=1,000,000); (ii) the number of Warrant Shares immediately prior to such Triggering Transaction is 30,000 (W=30,000); (iii) the
Conversion Price is $1.00 (E=$1.00); (iv) the price per share paid for the newly issued shares of Common Stock is $0.50 (T=$0.50); and (v) the number of new shares to be issued by the Company in connection with the Triggering
Transaction is 100,000 (N=100,000), the adjusted number of Warrant Shares would be calculated as follows: 
  

					
	W’ = 30,000 +	  	 [100,000 – (0.5 x 100,000 ÷ 1.00)] x 30,000 ÷
[1,000,000 + (0.5 x 100,000 ÷ 1.00)]
	  	 = 31,470.59

		  	1 – {30,000 ÷ [1,000,000 + (0.5 x 100,000 ÷ 1.00)]}	  	

 (b) For purposes of determining the number of Warrant Shares, the following subsections
Section 8(b)(i) to Section 8(b)(ix), inclusive, shall be applicable: 
 i) If the Company at any time
or from to time after the Original Issue Date shall issue any Options, whether directly or by assumption in a merger or otherwise, whether or not such Options are immediately exercisable, the purchase price with respect to such Options shall be
determined by dividing (x) the total amount, if any, received or receivable by the Company as consideration for the granting of such Options, plus the minimum aggregate amount of additional consideration (as set forth in the instruments
relating thereto, without regard to any provision contained therein for a subsequent adjustment of such consideration) payable to the Company upon the exercise of all such Options, plus, in the case of such Options which relate to Convertible
Securities, the minimum aggregate amount of additional consideration, if any, payable upon the issue or sale of such Convertible Securities and upon the conversion or exchange thereof, by (y) the maximum number of shares of Common Stock
issuable upon the exercise of such Options or the conversion or exchange of such Convertible Securities. 
 ii) If the Company
at any time or from to time after the Original Issue Date shall issue any Convertible Securities, whether directly or by assumption in a merger or otherwise, whether or not such Convertible Securities are immediately exercisable, the purchase price
with respect to such Convertible Securities shall be determined by dividing (x) the total amount received or receivable by the Company as consideration for the issue or sale of such Convertible Securities, plus the minimum aggregate amount of
additional consideration (as set forth in the instruments relating thereto, without regard to any provision contained therein for a subsequent adjustment of such consideration), if any, payable to the Company upon the conversion or exchange thereof,
by (y) the total maximum number of shares of Common Stock issuable upon the conversion or exchange of all such Convertible Securities. 
 iii) If the purchase price provided for in any Options referred to in Section 8(b)(i), the additional consideration, if any, payable upon the conversion or exchange of any Convertible Securities referred
to in Sections 8(b)(i) or 8(b)(ii), or the rate at which any Convertible Securities referred to in Sections 8(b)(i) or 8(b)(ii) are convertible into or exchangeable for shares of Common Stock shall change at any time,
including by reason of provisions with respect thereto designed to protect against dilution, the number of Warrant Shares in effect at the time of such change shall forthwith be adjusted to the number of Warrant Shares which would have been in
effect at such time had such Options or Convertible Securities outstanding at the time of such adjustment provided for such changed purchase price, additional consideration or conversion rate, as the case may be, at the time initially granted,
issued or sold. 
 iv) In case any Options shall be issued in connection with the issue or sale of other securities of the
Company, together comprising one integral transaction in which no specific consideration is allocated to such Options by the parties thereto, such Options shall be deemed to have been issued without consideration. 

 Warrant – Page 5 
 v) In case any shares of Additional Shares of Common Stock, Options or Convertible Securities shall be issued or sold or deemed to have
been issued or sold for cash, the consideration received therefor shall be deemed to be the amount received by the Company therefor. In case any Additional Shares of Common Stock, Options or Convertible Securities shall be issued or sold for a
consideration other than cash, the amount of the consideration other than cash received by the Company shall be the fair value of such consideration as determined in good faith by the Company’s Board of Directors (the “Board of
Directors”) which will be provided in writing to the Warrantholder as soon as possible after the transaction. In case any shares of Common Stock, Options or Convertible Securities shall be issued in connection with any merger in which the
Company is the surviving corporation, the amount of consideration therefor shall be deemed to be the fair value of such portion of the net assets and business of the non-surviving corporation as shall be attributed by the Board of Directors in good
faith to such Common Stock, Options or Convertible Securities, as the case may be, which attribution will be provided in writing to the Warrantholder as soon as possible after the transaction. 
 vi) The number of shares of Common Stock outstanding at any given time shall not include shares owned or held by or for the account of the
Company, and the disposition of any shares so owned or held shall be considered an issue or sale of Common Stock for the purpose of this Section 8. 
 vii) In case the Company shall declare a dividend or make any other distribution upon the stock of the Company payable in Options or
Convertible Securities, then in such case any Options or Convertible Securities, as the case may be, issuable in payment of such dividend or distribution shall be deemed to have been issued or sold without consideration. 
 viii) For purposes of this Section 8, in case the Company shall take a record of the holders of its Common Stock for the
purpose of entitling them (x) to receive a dividend or other distribution payable in Additional Shares of Common Stock, Options or in Convertible Securities, or (y) to subscribe for or purchase Additional Shares of Common Stock, Options or
Convertible Securities, then such record date shall be deemed to be the date of the issue or sale of the shares of Common Stock deemed to have been issued or sold upon the declaration of such dividend or the making of such other distribution or the
date of the granting of such right or subscription or purchase, as the case may be. 
 ix) Notwithstanding anything to the
contrary set forth in this Warrant, if the Company shall issue any Options and/or Convertible Securities, or otherwise agrees to issue any Options and/or Convertible Securities, then the Company shall be deemed to have issued Additional Shares of
Common Stock and the applicable provisions of this Section 8 shall apply to such issuance or deemed issuance. 
 (c) If the
Company shall at any time or from time to time while this Warrant is outstanding, pay a dividend or make a distribution on its Common Stock in shares of Common Stock, subdivide its outstanding shares of Common Stock into a greater number of shares
or combine its outstanding shares of Common Stock into a smaller number of shares or issue by reclassification of its outstanding shares of Common Stock any shares of its capital stock (including any such reclassification in connection with a
consolidation or merger in which the Company is the continuing corporation), then the number of Warrant Shares purchasable upon exercise of the Warrant and the Warrant Price in effect immediately prior to the date upon which such change shall become
effective, shall be adjusted by the Company so that the Warrantholder thereafter exercising the Warrant shall be entitled to receive the number of shares of Common Stock or other capital stock which the Warrantholder would have received if the
Warrant had 

 Warrant – Page 6 
 been exercised immediately prior to such event upon payment of a Warrant Price that has been adjusted to reflect a fair allocation of the economics of such event to the Warrantholder. Such adjustments shall be made
successively whenever any event listed above shall occur. 
 (d) If any capital reorganization, reclassification of the capital stock of the
Company, consolidation or merger of the Company with another corporation in which the Company is not the survivor, or sale, transfer or other disposition of all or substantially all of the Company’s assets to another corporation shall be
effected, then, as a condition of such reorganization, reclassification, consolidation, merger, sale, transfer or other disposition, lawful and adequate provision shall be made whereby each Warrantholder shall thereafter have the right to purchase
and receive upon the basis and upon the terms and conditions herein specified and in lieu of the Warrant Shares immediately theretofore issuable upon exercise of the Warrant, such shares of stock, securities or assets as would have been issuable or
payable with respect to or in exchange for a number of Warrant Shares equal to the number of Warrant Shares immediately theretofore issuable upon exercise of the Warrant, had such reorganization, reclassification, consolidation, merger, sale,
transfer or other disposition not taken place, and in any such case appropriate provision shall be made with respect to the rights and interests of each Warrantholder to the end that the provisions hereof (including, without limitation, provision
for adjustment of the Warrant Price) shall thereafter be applicable, as nearly equivalent as may be practicable in relation to any shares of stock, securities or properties thereafter deliverable upon the exercise thereof. The Company shall not
effect any such consolidation, merger, sale, transfer or other disposition without the consent of the Warrantholder unless prior to or simultaneously with the consummation thereof the successor corporation (if other than the Company) resulting from
such consolidation or merger, or the corporation purchasing or otherwise acquiring such assets or other appropriate corporation or entity shall assume the obligation to deliver to the holder of the Warrant such shares of stock, securities or assets
as, in accordance with the foregoing provisions, such holder may be entitled to purchase, and the other obligations under this Warrant. The provisions of this Section 8(d) shall similarly apply to successive reorganizations,
reclassifications, consolidations, mergers, sales, transfers or other dispositions. 
 (e) In case the Company shall fix a payment date for
the making of a distribution to all holders of Common Stock (including any such distribution made in connection with a consolidation or merger in which the Company is the continuing corporation) of evidences of indebtedness or assets (other than
cash dividends or cash distributions payable out of consolidated earnings or earned surplus or dividends or distributions referred to in Section 8(d)), or subscription rights or warrants, the Warrant Price to be in effect after such
payment date shall be determined by multiplying the Warrant Price in effect immediately prior to such payment date by a fraction, (i) the numerator of which shall be the total number of shares of Common Stock outstanding multiplied by the
Market Price per share of Common Stock (as defined below), less the fair market value (as determined by the Board of Directors in good faith) of said assets or evidences of indebtedness so distributed, or of such subscription rights or warrants, and
(ii) the denominator of which shall be the total number of shares of Common Stock outstanding multiplied by such Market Price per share of Common Stock. “Market Price” as of a particular date (the “Valuation
Date”) shall mean the following: (1) if the Common Stock is then listed on a national stock exchange, the closing sale price of one share of Common Stock on such exchange on the last trading day prior to the Valuation Date; (2) if
the Common Stock is then quoted on Nasdaq, the closing sale price of one share of Common Stock on Nasdaq on the last trading day prior to the Valuation Date or, if no such closing sale price is available, the average of the high bid and the low
sales price quoted on Nasdaq on the last trading day prior to the Valuation Date; or (3) if the Common Stock is not then listed on a national stock exchange or quoted on Nasdaq, the Fair Market Value of one share of Common Stock as of the
Valuation Date, shall be determined in good faith by the Board of Directors and the Warrantholder. The Board of Directors shall respond promptly, in writing, to an inquiry by the Warrantholder prior to the exercise hereunder as to the Market Value
of a share of Common Stock as determined by the Board of Directors. 

 Warrant – Page 7 
 In the event that the Board of Directors and the Warrantholder are unable to agree upon the Market Value in respect of Section 8(e)(3) hereof, the Company and the Warrantholder shall jointly select an
appraiser, who is experienced in such matters. The decision of such appraiser shall be final and conclusive, and the cost of such appraiser shall be borne evenly by the Company and the Warrantholder. Such adjustment shall be made successively
whenever such a payment date is fixed. 
 (f) In the event that, as a result of an adjustment made pursuant to this Section 8,
the holder of this Warrant shall become entitled to receive any shares of capital stock of the Company other than shares of Common Stock, the number of such other shares so receivable upon exercise of this Warrant shall be subject thereafter to
adjustment from time to time in a manner and on terms as nearly equivalent as practicable to the provisions with respect to the Warrant Shares contained in this Warrant. 
 (g) The following terms shall have the following meanings: 
 (i) “Additional Shares
of Common Stock” shall mean all shares of Common Stock issued (or, pursuant to the terms of this Section 8, deemed to be issued) by the Company after the Original Issue Date, other than the following shares of Common Stock, and
shares of Common Stock deemed issued pursuant to the following Options and Convertible Securities (collectively, “Exempted Securities”): 
 (1) shares of Common Stock, Options or Convertible Securities issued or deemed issued as a dividend, stock split, split-up or other distribution on shares of Common Stock that is covered by this Section 8;

 (2) up to an aggregate of 7,088,006 shares of Common Stock (subject to appropriate adjustment in the event of any stock
dividend, stock split, combinations or other similar recapitalization affecting such shares), including Options therefor, authorized under the Company’s various stock option plans in effect as of the Original Issue Date, of which no shares of
Common Stock have been issued as restricted stock as of the Original Issue Date or are issuable upon the exercise of Options outstanding as of the Original Issue Date and 7,088,006 shares of Common Stock are issuable to employees, consultants or
directors pursuant to stock option, stock grant, stock purchase or similar plans or arrangements approved by the Board of Directors or a committee thereof; 
 (3) shares of Common Stock or Convertible Securities actually issued upon the exercise of Options or shares of Common Stock actually issued upon the conversion or exchange of Convertible Securities, in each case
provided such issuance is pursuant to the terms of such Option or Convertible Security; and 
 (4) the issuance of the
Additional Warrants (as defined in the 2006 Purchase Agreement) and the shares of Common Stock issued or issuable upon the exercise thereof. 
 (ii) “Conversion Price” shall mean either (i) the conversion price per share in effect from time to time with respect to shares of the Company’s Series D Convertible Preferred Stock, par
value $1.00 per share (the “Series D Preferred Stock”), or (ii) if no shares of Series D Preferred Stock are outstanding, then the conversion price per share of Series D Preferred Stock that was in effect immediately prior to
the date on which the last share of Series D Preferred Stock was outstanding (as appropriately adjusted for any stock split, reverse stock split, stock dividend or other reclassification or combination of the Common Stock occurring on or after such
date). 

 Warrant – Page 8 
 (iii) “Convertible Securities” shall mean any evidences of indebtedness, shares of capital stock or other securities
directly or indirectly convertible into or exchangeable for Common Stock, but excluding Options. 
 (iv)
“Option” shall mean rights, options or warrants to subscribe for, purchase or otherwise acquire shares of Common Stock or Convertible Securities. 
 (v) “Original Issue Date” shall mean February 9, 2006. 
 9. Fractional Interest. The Company shall not be required to issue fractions of Warrant Shares upon the exercise of the Warrant. If any fractional
share of Common Stock would, except for the provisions of the first sentence of this Section 9, be delivered upon such exercise, the Company, in lieu of delivering such fractional share, shall pay to the exercising holder of this Warrant
an amount in cash equal to the current Market Price of such fractional share of Common Stock. 
 10. Benefits. Nothing in this Warrant
shall be construed to give any person, firm or corporation (other than the Company and the Warrantholder) any legal or equitable right, remedy or claim, it being agreed that this Warrant shall be for the sole and exclusive benefit of the Company and
the Warrantholder. 
 11. Notices to Warrantholder. Upon the happening of any event requiring an adjustment of the Conversion Price,
the Warrant Price or the number of Warrant Shares, the Company shall promptly give written notice thereof to the Warrantholder at the address appearing in the records of the Company, stating the adjusted Conversion Price, Warrant Price and the
adjusted number of Warrant Shares resulting from such event and setting forth in reasonable detail the method of calculation and the facts upon which such calculation is based. Failure to give such notice to the Warrantholder or any defect therein
shall not affect the legality or validity of the subject adjustment. 
 12. Identity of Transfer Agent. The Transfer Agent for the
Common Stock is ComputerShare Investor Services. Upon the appointment of any subsequent transfer agent for the Common Stock or other shares of the Company’s capital stock issuable upon the exercise of the rights of purchase represented by the
Warrant, the Company will mail to the Warrantholder a statement setting forth the name and address of such transfer agent. 
 13.
Notices. Unless otherwise provided, any notice required or permitted under this Warrant shall be given in writing and shall be deemed effectively given as hereinafter described (i) if given by personal delivery, then such notice shall be
deemed given upon such delivery, (ii) if given by telex or telecopier, then such notice shall be deemed given upon receipt of confirmation of complete transmittal, (iii) if given by mail, then such notice shall be deemed given upon the
earlier of (A) receipt of such notice by the recipient or (B) three days after such notice is deposited in first class mail, postage prepaid, and (iv) if given by an internationally recognized overnight air courier, then such notice
shall be deemed given one day after delivery to such carrier. All notices shall be addressed as follows: (i) if to the Warrantholder, at its address as set forth in the Company’s books and records and, if to the Company, at the address as
follows, or at such other address as the Warrantholder or the Company may designate by ten days’ advance written notice to the other: 
 If to the Company: 
 Artisoft, Inc. 
 5 Cambridge Center 

 Warrant – Page 9 
 Cambridge, Massachusetts 02142 
 Attn:   President 
 Fax:     (617) 354-3564

 With a copy to: 
 Andrews Kurth LLP 
 1717 Main Street, Suite 3700 
 Dallas, Texas 75201 
 Attn:   Victor B. Zanetti 
 Fax:      (214) 659-4400 
 14. Registration Rights. The initial holder of this Warrant may be entitled to the benefit of certain registration rights in respect of the
Warrant Shares as provided in the 2006 Purchase Agreement, and any subsequent holder hereof may be entitled to such rights. 
 15.
Successors. All the covenants and provisions hereof by or for the benefit of the Warrantholder shall bind and inure to the benefit of its respective successors and assigns hereunder. 
 16. Governing Law. This Warrant shall be governed by, and construed in accordance with, the laws of the State of New York. 
 17. Net Issue Election. Notwithstanding any other provision contained herein to the contrary, if the Warrant Shares may not be freely sold to the
public for any reason (including, but not limited to, the failure of the Company to have effected the registration of the Warrant Shares or to have a current prospectus available for delivery or otherwise, but excluding the inability of the
Warrantholder to sell the Warrant Shares due to market conditions), the Warrantholder may elect to receive, without the payment by the Warrantholder of the aggregate Warrant Price in respect of the shares of Common Stock to be acquired, shares of
Common Stock equal to the value of this Warrant or any portion hereof by the surrender of this Warrant (or such portion of this Warrant being so exercised) together with the Net Issue Election Notice annexed hereto as Appendix B duly
executed, at the office of the Company. Thereupon, the Company shall issue to the Warrantholder such number of fully paid, validly issued and nonassessable shares of Common Stock as is computed using the following formula: 
 X = Y (A - B) 
               A 
 where 
  

	 	X =	the number of Warrant Shares which the Warrantholder has then requested be issued to the Warrantholder; 

  

	 	Y =	the total number of Warrant Shares which the Warrantholder has surrendered at such time for cash-less exercise (including both shares to be issued to the Warrantholder and shares to
be canceled as payment therefor); 

  

	 	A =	the Market Price of a share of Common Stock; and 

  

	 	B =	the Warrant Price in effect under this Warrant at the time the net issue election is made. 

 Warrant – Page 10 
 18. No Rights as Stockholder. Prior to the exercise of this Warrant, the Warrantholder shall not have or exercise any rights as a stockholder of the Company by virtue of its ownership of this Warrant.

 19. Amendment; Waiver. Any term of this Warrant may be amended or waived (including the adjustment provisions included in
Section 8 of this Warrant) upon the written consent of the Company and the holders of at least a majority in interest of the Warrant Shares (assuming, for purposes of this Section 19 only, that all February 2006 Warrants had
been exercised in full in accordance with their respective terms). 
 20. Section Headings. The section heading in this Warrant
are for the convenience of the Company and the Warrantholder and in no way alter, modify, amend, limit or restrict the provisions hereof. 
 Section 21. No Dilution or Impairment. The Company will not, by amendment of its certificate of incorporation or through reorganization, consolidation, merger, dissolution, sale of assets or any other voluntary action, avoid or
seek to avoid the observance or performance of any of the terms of this Warrant, but will at all times in good faith assist in the carrying out of all such terms and in the taking of all such action as may be necessary or appropriate in order to
protect the rights of the Warrantholder set forth herein. Without limiting the generality of the foregoing, the Company will not increase the par value of any shares of stock receivable upon the exercise of this Warrant above the amount payable
therefor upon such exercise, and at all times will take all such action as may be necessary or appropriate in order that the Company may validly and legally issue fully paid and non-assessable stock upon the exercise of this Warrant. 
 [Remainder of Page Intentionally Left Blank] 

 Signature Page to Warrant 
 IN WITNESS WHEREOF, Artisoft, Inc. has caused this Warrant to be duly executed, as of the 9th day of February, 2006. 
  

			
	 ARTISOFT, INC.

		
	 By:
	 	/s/ KEN CLINEBELL        
	 Name:
	 	Ken Clinebell
	 Title:
	 	CFO-Interim

 APPENDIX A 
 WARRANT EXERCISE FORM 
  

	To:	Artisoft, Inc. 

 The undersigned hereby irrevocably elects
to exercise the right of purchase represented by the within Warrant (“Warrant”) for, and to purchase thereunder by the payment of the Warrant Price and surrender of the Warrant,
                     shares of Common Stock (“Warrant Shares”) provided for therein, and requests that certificates for the
Warrant Shares be issued as follows: 
  

			
	  
	 	
	  
	 	
	 Address
	 	
	  
	 	
	  
	 	
	 Federal Tax ID or Social Security No.
	 	

  

			
	 and delivered by
	  	 [  ] certified mail to the above address, or

		  	 [  ] electronically (provide DWAC Instructions:
                                ), or

		  	 [  ] other (specify:
                                        
                                        
                ).

 and, if the number of Warrant Shares shall not be all the Warrant Shares purchasable upon exercise of the Warrant,
that a new Warrant for the balance of the Warrant Shares purchasable upon exercise of this Warrant be registered in the name of the undersigned Warrantholder or the undersigned’s Assignee as below indicated and delivered to the address stated
below. 
 By exercising the rights represented by this Warrant, the undersigned hereby certifies that, as of the date of exercise of this
Warrant, the representations and warranties contained in Sections 5.2, 5.3 and 5.4 of the 2006 Purchase Agreement are true and correct in all material respects with respect to the undersigned. 
  

			
	 Dated:                         ,           
                  
	  	 Signature:                                     
                                        
                                        
                                        
                                        
    

  

			
	Note:  The signature must correspond with the name of the registered holder as written on the first page of the Warrant in every particular, without alteration or enlargement or any
change whatever, unless the Warrant has been assigned.	  	  
 Name
(please print)
  
  

		  	 Address
  

		  	 Federal Identification or
 Social Security No.
  
 Assignee:

		  	  

		  	  

 APPENDIX B 
 Net Issue Election Notice 
  

	To:	    Artisoft, Inc. 

  

	Date:                                     
                               	

 The undersigned hereby elects under Section 17 of
this Warrant to surrender the right to purchase                      shares of Common Stock pursuant to this Warrant and hereby requests the
issuance of                      shares of Common Stock. The certificate(s) for the shares issuable upon such net issue election shall be
issued in the name of the undersigned or as otherwise indicated below. 
  

			
	  
	 	
	 Signature
  
	 	
	 Name for Registration
  
	 	
	 Mailing Address
	 	

 Schedule of Warrant Holders 
  

			
	 Warrant Holder Name
	  	Number of Shares
	 MC Venture Partners V, L.P.
	  	589,918
	 Chestnut Venture Partners, L.P.
	  	24,093
	 MC Venture Investors, LLC
	  	10,989
	 Pathfinder Venture III, LLC
	  	104,167
	 SRB Greenway Capital, L.P.
	  	16,750
	 SRB Greenway Capital (Q.P.), L.P.
	  	131,417
	 SRB Greenway Offshore Operating Fund, L.P.
	  	8,083
	 Walker Smith Capital, L.P.
	  	8,438
	 Walker Smith Capital (Q.P.), L.P.
	  	48,125
	 Walker Smith International Fund, L.P.
	  	72,583
	 HHMI Investments, L.P.
	  	27,104Form of Amendment No. 1 to Voting Agreement

 Exhibit 4.10 
 AMENDMENT NO. 1 TO VOTING AGREEMENT 
 This AMENDMENT NO. 1 TO VOTING AGREEMENT (this
“Amendment”), is made and entered as of February 9, 2006, by and between Artisoft, Inc., a Delaware corporation (the “Company”) and the undersigned stockholders (collectively, the
“Stockholders”). Terms used but not otherwise defined in this Amendment shall have the meanings ascribed to such terms in the Voting Agreement (as hereinafter defined). 
 W I T N E S S E T H 
 WHEREAS, the Company desires to enter into a Securities Purchase Agreement, dated as of the date hereof, with certain investors (the “2006 Purchase Agreement”), relating to the issuance and sale of the Company’s
Series D Convertible Preferred Stock (the “Series D Preferred Stock”) and warrants to purchase shares of the Company’s Common Stock; 
 WHEREAS, the Series D Preferred Stock, in accordance with the Certificate of Designations of the Series D Preferred Stock, shall be entitled to vote on any matter presented to the stockholders of the Corporation; 
 WHEREAS, pursuant to the 2006 Purchase Agreement, the Company has agreed to seek stockholder approval to amend and restate its certificate of incorporation, as
amended and in effect, as provided in Section 3.5 of the 2006 Purchase Agreement (the “2006 Proposal”); 
 WHEREAS, the
Company and the Stockholders previously entered into that certain Voting Agreement, dated as of September 28, 2005 (the “Voting Agreement”); 
 WHEREAS, the Company and the Stockholders each desire to amend the Voting Agreement as set forth herein; and 
 WHEREAS, the Majority
Investors, as such term is defined in the Voting Agreement have consented to this Amendment pursuant to that Consent and Waiver Agreement, dated as of even date herewith, and attached hereto as Exhibit A. 
 NOW, THEREFORE, in consideration of the foregoing and the mutual covenants and agreements herein contained, and intending to be legally bound hereby, the Company
and the Stockholders, with the consent of the Majority Investors, hereby agree as follows: 
 Amendment. 
 The second Recital of the Voting Agreement is hereby amended to amend “Proposal” to mean the 2006 Proposal; and 
 The third Recital of the Voting Agreement is hereby amended to amend “Shares” to include the Series D Preferred Stock (if the Stockholders
acquired any of such shares) and any other shares of capital stock of the Company, owned now or hereafter acquired, entitled to vote on any matter presented to the stockholders of the Company. 

 No Further Amendments. The remaining provisions of the Voting Agreement shall remain in full force
and effect, except to the extent amended as provided in this Amendment. In the event of a conflict between the provisions contained in this Amendment and the provisions contained in the Voting Agreement, the provisions contained in the Amendment
shall be deemed controlling. 
 Entire Agreement. This Agreement constitutes the entire agreement and supersedes any and all other
prior agreements and undertakings, both written and oral, among the parties, or any of them, with respect to the subject matter hereof. 
 Counterparts. This Agreement may be executed (including by facsimile transmission) in one or more counterparts, and by the different parties hereto in separate counterparts, each of which when executed shall be deemed to be an
original but all of which shall constitute one and the same agreement. 
 [Signature Page Follows] 
  

 -2- 

 IN WITNESS WHEREOF, the parties hereto have caused this Amendment to be executed as of the date first written above.

  

			
	 ARTISOFT, INC.

		
	 By:
	 	 /s/ KEN CLINEBELL

	 Name:
	 	 Ken Clinebell

	 Title:
	 	 CFO-Interim

	
	 STOCKHOLDER:

		
	 By:
	 	   
	 Name:
	 	   
	 Title:
	 	   

 Schedule of Stockholders to Amendment No. 1 to Voting Agreement 
 M/C Ventures Partners V, L.P. 
 M/C Venture Investors, LLC 
 Chestnut Venture Partners, L.P. 
 Special Situations Fund III, L.P. 
 Special Situations Cayman Fund, L.P. 
 Special Situations Private Equity Fund, L.P.

 Special Situations Technology Fund, L.P. 
 Special Situations Technology Fund II, L.P. 
 Pathfinder Ventures III, L.L.C. 
 Coral’s Momentum Fund, Limited Partnership

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