EX-10.1



 Exhibit 10.1 

INDEMNIFICATION AGREEMENT 

This Indemnification Agreement, dated
                    , is made between Xtera Communications, Inc., a Delaware corporation (the “Company”), and
                     (the “Indemnitee”). 

RECITALS 
 A. The Company
desires to attract and retain the services of talented and experienced individuals, such as Indemnitee, to serve as directors and officers of the Company and its subsidiaries and wishes to indemnify its directors and officers to the maximum extent
permitted by law; 
 B. The Company and Indemnitee recognize that corporate litigation in general has subjected directors and officers to
expensive litigation risks; 
 C. Section 145 of the General Corporation Law of Delaware, under which the Company is organized
(“Section 145”), empowers the Company to indemnify its directors and officers by agreement and to indemnify persons who serve, at the request of the Company, as the directors and officers of other corporations or
enterprises, and expressly provides that the indemnification provided by Section 145 is not exclusive; 
 D. Section 145(g) allows
for the purchase of management liability (“D&O”) insurance by the Company, which in theory can cover asserted liabilities without regard to whether they are indemnifiable by the Company or not; 

E. Individuals considering service or presently serving expect to be extended market terms of indemnification commensurate with their
position, and that entities such as Company will endeavor to maintain appropriate D&O insurance; and 
 F. In order to induce Indemnitee
to serve or continue to serve as a director or officer of the Company and/or one or more subsidiaries of the Company, or otherwise serve the Company in an indemnifiable capacity as set forth below, the Company and Indemnitee enter into this
Agreement. 
 AGREEMENT 

NOW, THEREFORE, Indemnitee and the Company hereby agree as follows: 

1. Definitions. As used in this Agreement: 

(a) “Agent” means any person who is or was a director, officer, employee or other agent of the Company or a
subsidiary of the Company; or is or was serving at the request of, for the convenience of, or to represent the interests of the Company or a subsidiary of the Company as a director, officer, employee or agent of another foreign or domestic
corporation, limited liability company, employee benefit plan, nonprofit entity, partnership, joint venture, trust or other enterprise; or was a director, officer, employee or agent of a foreign or domestic corporation which was a predecessor
corporation of the Company or a subsidiary of the Company, or was a director, officer, employee or agent of another enterprise at the request of, for the convenience of, or to represent the interests of such predecessor corporation. 

(b) “Board” means the Board of Directors of the Company. 

  
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 (c) A “Change in Control” shall be deemed to have occurred if
(i) any “person,” as such term is used in Sections 13(d) and 14(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), other than a trustee or other fiduciary holding securities under an
employee benefit plan of the Company or a corporation owned directly or indirectly by the stockholders of the Company in substantially the same proportions as their ownership of stock of the Company, is or becomes the “beneficial owner”
(as defined in Rule 13d-3 under the Exchange Act), directly or indirectly, of securities of the Company representing a majority of the total voting power represented by the Company’s then outstanding
voting securities, (ii) during any period of two consecutive years, individuals who at the beginning of such period constituted the Board, together with any new directors whose election by the Board or nomination for election by the
Company’s stockholders was approved by a vote of at least two-thirds of the directors then still in office who either were directors at the beginning of the period or whose election or nomination was previously so approved, cease for any reason
to constitute a majority of the Board, (iii) the stockholders of the Company approve a merger or consolidation or a sale of all or substantially all of the Company’s assets with or to another entity, other than a merger, consolidation or
asset sale that would result in the holders of the Company’s outstanding voting securities immediately prior thereto continuing to represent (either by remaining outstanding or by being converted into voting securities of the surviving entity)
at least a majority of the total voting power represented by the voting securities of the Company or such surviving or successor entity outstanding immediately thereafter, or (iv) the stockholders of the Company approve a plan of complete
liquidation of the Company. 
 (d) “Expenses” shall include all out-of-pocket costs of any type or nature whatsoever (including, without limitation, all attorneys’ fees and related disbursements), actually and reasonably incurred by Indemnitee in connection with
either the investigation, defense, or appeal of a Proceeding, or establishing or enforcing a right to indemnification under this Agreement, or Section 145 or otherwise; provided, however, that “Expenses” shall not include any
judgments, fines, ERISA excise taxes or penalties, or amounts paid in settlement of a Proceeding. 
 (e) “Independent
Counsel” means a law firm, or a partner (or, if applicable, member) of such a law firm, that is experienced in relevant matters of corporation law and neither currently is, nor in the past five years has been, retained to represent:
(i) the Company or Indemnitee in any matter material to either such party or (ii) any other party to or witness in the proceeding giving rise to a claim for indemnification hereunder. But “Independent Counsel” shall not include
any person who, under the applicable standards of professional conduct then prevailing, would have a conflict of interest in representing either the Company or Indemnitee in an action to determine Indemnitee’s rights under this Agreement. Where
required by this Agreement, Independent Counsel shall be retained at the Company’s sole expense. 
 (f)
“Proceeding” means any threatened, pending, or completed action, claim, suit, arbitration, alternate dispute resolution mechanism, investigation, administrative hearing, or any other proceeding whether formal or informal,
civil, criminal, administrative, or investigative, including any such investigation or proceeding instituted by or on behalf of the Corporation or its Board of Directors, in which Indemnitee is or reasonably may be involved as a party or target,
that is associated with Indemnitee’s being an Agent of the Corporation. 
 (g) “Subsidiary” means any
corporation of which more than 50% of the outstanding voting securities is owned directly or indirectly by the Company, by the Company and/or one or more other subsidiaries. 

2. Agreement to Serve. Indemnitee agrees to serve and/or continue to serve as an Agent of the Company, at its will (or under separate
agreement, if such agreement exists), in the capacity Indemnitee currently serves as an Agent of the Company, so long as Indemnitee is duly appointed or 

  
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elected and qualified in accordance with the applicable provisions of the Bylaws of the Company or any subsidiary of the Company or until such time as Indemnitee tenders his or her resignation in
writing; provided, however, that nothing contained in this Agreement is intended to create any right to continued employment or other service by Indemnitee. 

3. Liability Insurance. 

(a) Maintenance of D&O Insurance. The Company hereby covenants and agrees that, so long as Indemnitee shall continue to serve as
an Agent of the Company and thereafter so long as Indemnitee shall be subject to any possible Proceeding by reason of the fact that Indemnitee was an Agent of the Company, the Company, subject to Section 3(c), shall promptly obtain and maintain
in full force and effect directors’ and officers’ liability insurance (“D&O Insurance”) in reasonable amounts from established and reputable insurers of a minimum A.M. Best rating of A- VII, and as more fully
described below. In the event of a Change in Control, the Company shall, as set forth in Section (c) below, either: (i) maintain such D&O Insurance for six years; or (ii) purchase a six year tail for such D&O Insurance. Should
a tail policy be purchased, reasonable efforts shall be made to try to obtain the coverage through Company’s D&O insurance broker at that time, and under the same or better terms and limits in place at that time. 

(b) Rights and Benefits. In all policies of D&O Insurance, Indemnitee shall qualify as an insured in such a manner as to provide
Indemnitee the same rights and benefits as are accorded to the most favorably insured of the Company’s Agents of the same standing as Indemnitee. 

(c) Limitation on Required Maintenance of D&O Insurance. Notwithstanding the foregoing, the Company shall have no obligation to
obtain or maintain D&O Insurance at all, or of any type, terms, or amount, if the Company determines in good faith and after using commercially reasonable efforts that: such insurance is not reasonably available; the premium costs for such
insurance are disproportionate to the amount of coverage provided; the coverage provided by such insurance is limited so as to provide an insufficient or unreasonable benefit; Indemnitee is covered by similar insurance maintained by a subsidiary of
the Company; or the Company is to be acquired and a tail policy of reasonable terms and duration can be purchased for pre-closing acts or omissions by Indemnitee. 

4. Mandatory Indemnification. Subject to the terms of this Agreement: 

(a) Third Party Actions. If Indemnitee is a person who was or is a party or is threatened to be made a party to any Proceeding (other
than an action by or in the right of the Company) by reason of the fact that Indemnitee is or was an Agent of the Company, or by reason of anything done or not done by Indemnitee in any such capacity, the Company shall indemnify Indemnitee against
all Expenses and liabilities of any type whatsoever (including, but not limited to, judgments, fines, ERISA excise taxes and penalties, and amounts paid in settlement) actually and reasonably incurred by Indemnitee in connection with the
investigation, defense, settlement or appeal of such Proceeding, provided Indemnitee acted in good faith and in a manner Indemnitee reasonably believed to be in or not opposed to the best interests of the Company, and, with respect to any criminal
action or Proceeding, had no reasonable cause to believe his or her conduct was unlawful. 
 (b) Derivative Actions. If Indemnitee
is a person who was or is a party or is threatened to be made a party to any Proceeding by or in the right of the Company by reason of the fact that Indemnitee is or was an Agent of the Company, or by reason of anything done or not done by
Indemnitee in any such capacity, the Company shall indemnify Indemnitee against all Expenses actually and reasonably incurred by Indemnitee in connection with the investigation, defense, settlement or appeal of such Proceeding, provided Indemnitee
acted in good faith and in a manner Indemnitee reasonably 

  
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believed to be in or not opposed to the best interests of the Company; except that no indemnification under this Section 4(b) shall be made in respect to any claim, issue or matter as to
which Indemnitee shall have been finally adjudged to be liable to the Company by a court of competent jurisdiction unless and only to the extent that the Delaware Court of Chancery or the court in which such Proceeding was brought shall determine
upon application that, despite the adjudication of liability but in view of all the circumstances of the case, Indemnitee is fairly and reasonably entitled to indemnity for such amounts which the Delaware Court of Chancery or such other court shall
deem proper. 
 (c) Actions where Indemnitee is Deceased. If Indemnitee is a person who was or is a party or is threatened to be
made a party to any Proceeding by reason of the fact that Indemnitee is or was an Agent of the Company, or by reason of anything done or not done by Indemnitee in any such capacity, and if, prior to, during the pendency of or after completion of
such Proceeding Indemnitee is deceased, the Company shall indemnify Indemnitee’s heirs, executors and administrators against all Expenses and liabilities of any type whatsoever to the extent Indemnitee would have been entitled to
indemnification pursuant to this Agreement were Indemnitee still alive. 
 (d) Certain Terminations. The termination of any
Proceeding or of any claim, issue, or matter therein by judgment, order, settlement, or conviction, or upon a plea of nolo contendere or its equivalent, shall not (except as otherwise expressly provided in this Agreement) of itself create a
presumption that Indemnitee did not act in good faith and in a manner which Indemnitee reasonably believed to be in or not opposed to the best interests of the Company or, with respect to any criminal action or Proceeding, that Indemnitee had
reasonable cause to believe that Indemnitee’s conduct was unlawful. 
 (e) Limitations. Notwithstanding the foregoing
provisions of Sections 4(a), 4(b), 4(c) and 4(d) hereof, but subject to the exception set forth in Section 13 which shall control, the Company shall not be obligated to indemnify the Indemnitee for Expenses or liabilities of any type whatsoever
for which payment (and the Company’s indemnification obligations under this Agreement shall be reduced by such payment) is actually made to or on behalf of Indemnitee, by the Company or otherwise, under a corporate insurance policy, or under a
valid and enforceable indemnity clause, right, by-law, or agreement; and, in the event the Company has previously made a payment to Indemnitee for an Expense or liability of any type whatsoever for which payment is actually made to or on behalf of
the Indemnitee from any such source, Indemnitee shall return to the Company the amounts subsequently received by the Indemnitee that source. 

(f) Witness. In the event that Indemnitee is not a party or threatened to be made a party to a Proceeding, but is subpoenaed (or given
a written request to be interviewed by or provide documents or information to a government authority) in such a Proceeding by reason of the fact that the Indemnitee is or was an Agent of the Company, or by reason of anything witnessed or allegedly
witnessed by the Indemnitee in that capacity, the Company shall indemnify the Indemnitee against all actually and reasonably incurred out of pocket costs (including without limitation legal fees) incurred by the Indemnitee in responding to such
subpoena or written request for an interview. As a condition to this right, Indemnitee must provide notice of such subpoena or request to the Company within 14 days, otherwise the Company’s obligation to pay such costs shall only attach for
costs incurred from the date of notice. 
 5. Indemnification for Expenses in a Proceeding in Which Indemnitee is Wholly or Partly
Successful. 
 (a) Successful Defense. Notwithstanding any other provisions of this Agreement, to the extent Indemnitee has been
successful, on the merits or otherwise, in defense of any Proceeding 

  
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(including, without limitation, an action by or in the right of the Company) in which Indemnitee was a party by reason of the fact that Indemnitee is or was an Agent of the Company at any time,
the Company shall indemnify Indemnitee against all Expenses actually and reasonably incurred by or on behalf of Indemnitee in connection with the investigation, defense or appeal of such Proceeding. 

(b) Partially Successful Defense. Notwithstanding any other provisions of this Agreement, to the extent that Indemnitee is a party to
any Proceeding (including, without limitation, an action by or in the right of the Company) in which Indemnitee was a party by reason of the fact that Indemnitee is or was an Agent of the Company at any time and is successful, on the merits or
otherwise, as to one or more but less than all claims, issues or matters in such Proceeding, the Company shall indemnify Indemnitee against all Expenses actually and reasonably incurred by or on behalf of Indemnitee in connection with each
successfully resolved claim, issue or matter. 
 (c) Dismissal. For purposes of this section and without limitation, the termination
of any claim, issue or matter in such a Proceeding by dismissal, with or without prejudice, shall be deemed to be a successful result as to such claim, issue or matter. 

(d) Contribution. If the indemnification provided in this Agreement is unavailable and may not be paid to Indemnitee, then to the
extent allowed by law, in respect of any threatened, pending or completed action, suit or proceeding in which the Company is jointly liable with Indemnitee (or would be if joined in such action, suit or proceeding), the Company shall contribute to
the amount of expenses (including attorneys’ fees), judgments, fines and amounts paid in settlement actually and reasonably incurred and paid or payable by Indemnitee in such proportion as is appropriate to reflect (i) the relative
benefits received by the Company on the one hand and Indemnitee on the other hand from the transaction from which such action, suit or proceeding arose, and (ii) the relative fault of Company on the one hand and of Indemnitee on the other in
connection with the events which resulted in such expenses, judgments, fines or settlement amounts, as well as any other relevant equitable considerations. The relative fault of the Company on the one hand and of Indemnitee on the other shall be
determined by reference to, among other things, the parties’ relative intent, knowledge, access to information, active or passive conduct, and opportunity to correct or prevent the circumstances resulting in such expenses, judgments, fines or
settlement amounts. The Company agrees that it would not be just and equitable if contribution pursuant to this section were determined by pro rata allocation or any other method of allocation which does not take account of the foregoing equitable
considerations. 
 (e) Settlements by Company. The Company may not settle any claim held by Indemnitee without express written
consent of Indemnitee, which may be given or withheld in Indemnitee’s sole discretion. 
 6. Mandatory Advancement of Expenses.

 (a) Subject to the terms of this Agreement and following notice pursuant to Section 7(a) below, the Company shall advance, interest
free, all Expenses reasonably incurred by Indemnitee in connection with the investigation, defense, settlement or appeal of any Proceeding to which Indemnitee is a party or is threatened to be made a party by reason of the fact that Indemnitee is or
was an Agent of the Company (unless there has been a final determination such that Indemnitee is not entitled to indemnification for such Expenses) upon receipt satisfactory documentation supporting such Expenses. Such advances are intended to be an
obligation of the Company to Indemnitee hereunder and shall in no event be deemed to be a personal loan. Such advancement of Expenses shall otherwise be unsecured and without regard to Indemnitee’s ability to repay. The advances to be made
hereunder shall be paid by the Company to Indemnitee within 30 days following delivery of a written request therefore by Indemnitee to the Company, along with such documentation and information as is reasonably available to the Indemnitee


  
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and is reasonably necessary to determine whether and to what extent the claimant is entitled to advancement (which shall include without limitation reasonably detailed invoices for legal
services, but with disclosure of confidential work product not required). The Company shall discharge its advancement duty by, at its option, (a) paying such Expenses on behalf of Indemnitee, (b) advancing to Indemnitee funds in an amount
sufficient to pay such Expenses, or (c) reimbursing Indemnitee for Expenses already paid by Indemnitee. In the event that the Company fails to pay Expenses as incurred by Indemnitee as required by this paragraph, Indemnitee may seek mandatory
injunctive relief (including without limitation specific performance) from any court having jurisdiction to require the Company to pay Expenses as set forth in this paragraph. If Indemnitee seeks mandatory injunctive relief pursuant to this
paragraph, it shall not be a defense to enforcement of the Company’s obligations set forth in this paragraph that Indemnitee has an adequate remedy at law for damages. 

(b) Undertakings. Indemnitee shall qualify for advances upon the execution and delivery to the Company of this Agreement, which
constitutes an undertaking whereby Indemnitee promises to repay any amounts advanced if and to the extent that it shall ultimately be determined that Indemnitee is not entitled to indemnification by the Company. 

7. Notice and Other Indemnification Procedures. 

(a) Notice by Indemnitee. Promptly after receipt by Indemnitee of notice of the commencement of or the threat of commencement of any
Proceeding, Indemnitee shall, if Indemnitee believes that indemnification with respect thereto may be sought from the Company under this Agreement, notify the Company in writing of the commencement or threat of commencement thereof provided,
however, that a delay in giving such notice will not deprive Indemnitee of any right to be indemnified under this Agreement unless, and then only to the extent that, the Company did not otherwise learn of the Proceeding and such delay is
materially prejudicial to the Company; and provided further that notice will be deemed to have been given without any action on the part of Indemnitee in the event the Company is a party to the same Proceeding and has notice thereof. 

(b) Insurance. If the Company receives notice pursuant to Section 7(a) hereof of the commencement of a Proceeding that may be
covered under D&O Insurance then in effect, the Company shall give prompt notice of the commencement of such Proceeding to the insurers in accordance with the procedures set forth in the respective policies. 

(c) Defense. In the event the Company shall be obligated to pay the Expenses of any Proceeding against Indemnitee, the Company shall
be entitled to assume the defense of such Proceeding, with counsel selected by the Company and approved by Indemnitee (which approval shall not be unreasonably withheld), upon the delivery to Indemnitee of written notice of the Company’s
election so to do. After delivery of such notice, and the retention of such counsel by the Company, the Company will not be liable to Indemnitee under this Agreement for any fees of counsel subsequently incurred by Indemnitee with respect to the
same Proceeding, provided that (i) Indemnitee shall have the right to employ his or her own counsel in any such Proceeding at Indemnitee’s expense; and (ii) Indemnitee shall have the right to employ his or her own counsel in any such
Proceeding at the Company’s expense if (A) the Company has authorized the employment of counsel by Indemnitee at the expense of the Company; (B) Indemnitee shall have reasonably concluded based on the written advice of
Indemnitee’s legal counsel that there may be a conflict of interest between the Company and Indemnitee in the conduct of any such defense; or (C) the Company shall not, in fact, have employed counsel to assume the defense of such
Proceeding. In addition to all the requirements above, if the Company has D&O Insurance, or other insurance, with a panel counsel requirement that may cover the matter for which indemnity is claimed by Indemnitee, then Indemnitee shall use
such panel counsel or other counsel approved by the insurers, unless there is an actual conflict of interest posed by representation by all such counsel, or unless and to the extent Company waives such requirement in writing. Indemnitee and his
counsel shall provide reasonable cooperation with such insurer on request of the Company. 

  
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 8. Right to Indemnification. 

(a) Right to Indemnification. In the event that Section 5(a) is inapplicable, the Company shall indemnify Indemnitee pursuant to
this Agreement unless, and except to the extent that, it shall have been determined by one of the methods listed in Section 8(b) that Indemnitee has not met the applicable standard of conduct required to entitle Indemnitee to such
indemnification. 
 (b) Determination of Right to Indemnification. A determination of Indemnitee’s right to indemnification
under this Section 8 shall be made at the election of the Board by (i) a majority vote of directors who are not parties to the Proceeding for which indemnification is being sought, even though less than a quorum, or by a committee
consisting of directors who are not parties to the Proceeding for which indemnification is being sought, who, even though less than a quorum, have been designated by a majority vote of the disinterested directors, or (ii) if there are no such
disinterested directors or if the disinterested directors so direct, by Independent Counsel chosen by the Company in a written opinion to the Board, a copy of which shall be delivered to Indemnitee. However, in the event there has been a Change in
Control, then the determination shall, at Indemnitee’s sole option, be made by Independent Counsel as in (b)(ii), above, with Indemnitee choosing the Independent Counsel subject to Company’s consent, such consent not to be unreasonably
withheld. 
 (c) Submission for Decision. As soon as practicable, and in no event later than 30 days after Indemnitee’s written
request for indemnification, the Board shall select the method for determining Indemnitee’s right to indemnification. Indemnitee shall cooperate with the person or persons or entity making such determination with respect to Indemnitee’s
right to indemnification, including providing to such person, persons or entity, upon reasonable advance request, any documentation or information which is not privileged or otherwise protected from disclosure and which is reasonably available to
Indemnitee and reasonably necessary to such determination. Any Independent Counsel or member of the Board shall act reasonably and in good faith in making a determination regarding Indemnitee’s entitlement to indemnification under this
Agreement. 
 (d) Application to Court. If (i) a claim for indemnification or advancement of Expenses is denied, in whole or in
part, (ii) no disposition of such claim is made by the Company within 60 days after the request therefore, (iii) the advancement of Expenses is not timely made pursuant to Section 6 of this Agreement or (iv) payment of
indemnification is not made pursuant to Section 5 of this Agreement, Indemnitee shall have the right at his option to apply to the Delaware Court of Chancery, a California state or federal court, the court in which the Proceeding is or was
pending, or any other court of competent jurisdiction, for the purpose of enforcing Indemnitee’s right to indemnification (including the advancement of Expenses) pursuant to this Agreement. Upon written request by Indemnitee, the Company shall
consent to service of process. 
 (e) Expenses Related to the Enforcement or Interpretation of this Agreement. The Company shall
indemnify Indemnitee against all reasonable Expenses incurred by Indemnitee in connection with any hearing or proceeding under this Section 8 involving Indemnitee, and against all reasonable Expenses incurred by Indemnitee in connection with
any other proceeding between the Company and Indemnitee to the extent involving the interpretation or enforcement of the rights of Indemnitee under this Agreement, if and to the extent Indemnitee is successful. 

  
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 (f) In no event shall Indemnitee’s right to indemnification (apart from advancement of
Expenses) be determined prior to a final adjudication in a Proceeding at issue if the Proceeding is both ongoing, and of the nature to have a final adjudication. 

(g) In any proceeding to determine Indemnitee’s right to indemnification or advancement, Indemnitee shall be presumed to be entitled to
indemnification or advancement, with the burden of proof on the Company to prove, by a preponderance of the evidence (or higher standard if required by relevant law) that Indemnitee is not so entitled. 

(h) Indemnitee shall be fully indemnified for those matters where, in the performance of his duties for the Company, he relied in good faith
upon the records of the Company and upon such information, opinions, reports or statements presented to the Company by any of the Company’s officers or employees, or committees of the board of directors, or by any other person as to matters
Indemnitee reasonably believed were within such other person’s professional or expert competence and who was selected with reasonable care by or on behalf of the Company. 

9. Exceptions. Any other provision herein to the contrary notwithstanding, the Company shall not be obligated: 

(a) Claims Initiated by Indemnitee. To indemnify or advance Expenses to Indemnitee with respect to Proceedings or claims initiated or
brought voluntarily by Indemnitee (including cross actions), with a reasonable allocation where appropriate, unless (i) such indemnification is expressly required to be made by law, (ii) the Proceeding was authorized by the Board,
(iii) such indemnification is provided by the Company, in its sole discretion, pursuant to the powers vested in the Company under the General Corporation Law of Delaware or (iv) the Proceeding is brought pursuant to Section 8
specifically to establish or enforce a right to indemnification under this Agreement or any other statute or law or otherwise as required under Section 145 in advance of a final determination, in which case 8(e)’s fees-on-fees provision
shall control. 
 (b) Fees on Fees. To indemnify Indemnitee for any Expenses incurred by Indemnitee with respect to any Proceeding
instituted by Indemnitee to enforce or interpret this Agreement, to the extent Indemnitee is not successful in such a Proceeding. 
 (c)
Unauthorized Settlements. To indemnify Indemnitee under this Agreement for any amounts paid in settlement of a Proceeding unless the Company consents to such settlement, which consent shall not be unreasonably withheld. 

(d) Claims Under Section 16(b). To indemnify Indemnitee for Expenses associated with any Proceeding related to, or the payment of
profits made from the purchase and sale (or sale and purchase) by Indemnitee of securities of the Company within the meaning of Section 16(b) of the Securities Exchange Act of 1934, as amended, or similar provisions of state statutory law or
common law (provided, however, that the Company must advance Expenses for such matters as otherwise permissible under this Agreement). 

(e) Payments Contrary to Law. To indemnify or advance Expenses to Indemnitee for which payment is prohibited by applicable law. 

(f) Required Reimbursement. To indemnify Indemnitee for any reimbursement of the Company by Indemnitee of any compensation, including
bonus or other incentive-based or equity-based compensation or of any profits realized by Indemnitee from the sale of securities of the Company, as required in each case under the ’33 or ’34 Acts (including without limitation
reimbursements that 

  
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(i) arise from an accounting restatement of the Company pursuant to Section 304 of the Sarbanes-Oxley Act of 2002, or the payment to the Company of profits arising from the purchase and
sale by Indemnitee of securities in violation of Section 306 of the Sarbanes-Oxley Act of 2002, or (ii) arise pursuant to regulations or policies adopted in compliance with Section 954 of the Investor Protection and Securities Reform
Act of 2010). 
 10. Non-Exclusivity. The provisions for indemnification and advancement of
Expenses set forth in this Agreement shall not be deemed exclusive of any other rights which Indemnitee may have under any provision of law, the Company’s Certificate of Incorporation or Bylaws, the vote of the Company’s stockholders or
disinterested directors, other agreements, or otherwise, both as to action in Indemnitee’s official capacity and as to action in another capacity while occupying Indemnitee’s position as an Agent of the Company. Indemnitee’s rights
hereunder shall continue after Indemnitee has ceased acting as an Agent of the Company and shall inure to the benefit of the heirs, executors and administrators of Indemnitee. 

11. Permitted Defenses. It shall be a defense to any action for which a claim for indemnification is made under this Agreement (other
than an action brought to enforce a claim for Expenses pursuant to Section 6 hereof, provided that the required documents have been tendered to the Company) that Indemnitee is not entitled to indemnification because of the limitations set forth
in Sections 4 and 9 hereof. Neither the failure of the Company or an Independent Counsel to have made a determination prior to the commencement of such enforcement action that indemnification of Indemnitee is proper in the circumstances, nor an
actual determination by the Company or an Independent Counsel that such indemnification is improper, shall be a defense to the action or create a presumption that Indemnitee is not entitled to indemnification under this Agreement or otherwise. In
making any determination concerning Indemnitee’s right to indemnification, there shall be a presumption that Indemnitee has satisfied the applicable standard of conduct. Any determination by the Company concerning Indemnitee’s right to
indemnification that is adverse to Indemnitee may be challenged by the Indemnitee in the Court of Chancery of the State of Delaware. 
 12.
Subrogation. Subject to the limitations of Section 13, in the event the Company is obligated to make a payment under this Agreement, the Company shall be subrogated to the extent of such payment to all of the rights of recovery of
Indemnitee, who shall execute all documents reasonably required and take all action that may be necessary to secure such rights and to enable the Company effectively to bring suit to enforce such rights (provided that the Company pays
Indemnitee’s costs and expenses of doing so), including without limitation by assigning all such rights to the Company or its designee to the extent of such indemnification or advancement of Expenses. The Company’s obligation to indemnify
or advance expenses under this Agreement shall be reduced by any amount Indemnitee has collected from such other source, and in the event that Company has fully paid such indemnity or expenses, Indemnitee shall return to the Company any amounts
subsequently received from such other source of indemnification. 
 13. Primacy of Indemnification. The Company hereby acknowledges
that Indemnitee may have certain rights to indemnification, advancement of expenses, or liability insurance provided by a third-party investor and certain of its affiliates (collectively, the “Fund Indemnitors”). The Company
hereby agrees that (i) it is the indemnitor of first resort, i.e., its obligations to Indemnitee under this Agreement and any indemnity provisions set forth in its Certificate of Incorporation, Bylaws or elsewhere (collectively,
“Indemnity Arrangements”) are primary, and any obligation of the Fund Indemnitors to advance expenses or to provide indemnification for the same expenses or liabilities incurred by Indemnitee is secondary and excess,
(ii) it shall advance the full amount of expenses incurred by Indemnitee and shall be liable for the full amount of all expenses, judgments, penalties, fines and amounts paid in settlement by or on behalf of Indemnitee, to the extent legally
permitted and as required by any 

  
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Indemnity Arrangement, without regard to any rights Indemnitee may have against the Fund Indemnitors, and (iii) it irrevocably waives, relinquishes and releases the Fund Indemnitors from any
claims against the Fund Indemnitors for contribution, subrogation or any other recovery of any kind arising out of or relating to any Indemnity Arrangement. The Company further agrees that no advancement or indemnification payment by any Fund
Indemnitor on behalf of Indemnitee shall affect the foregoing, and the Fund Indemnitors shall be subrogated to the extent of such advancement or payment to all of the rights of recovery of Indemnitee against the Company. The Company and Indemnitee
agree that the Fund Indemnitors are express third party beneficiaries of the terms of this Section 13. The Company, on its own behalf and on behalf of its insurers to the extent allowed by its insurance policies, waives subrogation rights
against Indemnitee and Fund Indemnitors. 
 14. Information Sharing. If Indemnitee is the subject of or is implicated in any
investigation, whether formal or informal, by a government or regulatory entity or agency, the Company shall provide to Indemnitee any factual written information provided to the investigating entity concerning the investigation; provided, that by
executing this Agreement, Indemnitee agrees to use such information solely in connection with the defense of such investigation and, if Indemnitee is not then serving the Company as an officer or director, shall execute a confidentiality agreement.
This section 14 shall not apply if either: (a) a majority vote of the body set forth in Section 8(b) or, if a Change in Control then Independent Counsel, shall conclude that it is detrimental to the Company’s interests in that
investigation or any related actual or threatened Proceeding for the Company to share such information; or (b) such information sharing is prohibited or limited by law or court order. 

15. Broadest Interpretation. In the event of any change after the date of this Agreement in law, statute, or rule which expands the
right Company to indemnify Indemnitee, it is the intent of the parties hereto that Indemnitee shall enjoy by this Agreement the greater benefits afforded by such change. In the event of any change in law, statute, or rule which narrows the right of
Company to indemnify Indemnitee, such change, to the extent allowed by law, shall only apply to matters that relate to alleged acts, errors, or omissions of Indemnitee that postdate such change. 

16. No Imputation. The knowledge or actions, or failure to act, of any director, officer, employee, or agent of the Company, or the
Company itself shall not be imputed to Indemnitee for the purpose of determining Indemnitee’s rights hereunder. 
 17. Survival of
Rights. 
 (a) All agreements and obligations of the Company contained herein shall continue during the period Indemnitee is an Agent
of the Company and shall continue thereafter so long as Indemnitee shall be subject to any possible claim or threatened, pending or completed Proceeding by reason of the fact that Indemnitee was serving in the capacity referred to herein. 

(b) The Company shall require any successor to the Company (whether direct or indirect, by purchase, merger, consolidation or otherwise) to
all or substantially all of the business or assets of the Company, expressly to assume and agree to perform this Agreement in the same manner and to the same extent that the Company would be required to perform if no such succession had taken place.

 18. Interpretation of Agreement. It is understood that the parties hereto intend this Agreement to be interpreted and enforced so
as to provide indemnification to Indemnitee to the fullest extent permitted by law, including those circumstances in which indemnification would otherwise be discretionary. 

  
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 19. Severability. If any provision or provisions of this Agreement shall be held to be
invalid, illegal or unenforceable for any reason whatsoever, (i) the validity, legality and enforceability of the remaining provisions of the Agreement (including, without limitation, all portions of any paragraphs of this Agreement containing
any such provision held to be invalid, illegal or unenforceable, that are not themselves invalid, illegal or unenforceable) shall not in any way be affected or impaired thereby, and (ii) to the fullest extent possible, such remaining provisions
shall be construed so as to give effect to the intent manifested by the provision held invalid, illegal, or unenforceable. 
 20.
Modification and Waiver. No supplement, modification or amendment of this Agreement shall be binding unless it is in a writing signed by both of the parties hereto. No waiver of any of the provisions of this Agreement shall be deemed or shall
constitute a waiver of any other provisions (even if similar) nor shall such waiver constitute a continuing waiver. 
 21. Notice.
All notices, requests, demands and other communications under this Agreement shall be in writing and shall be deemed to have been duly given (a) upon delivery if delivered by hand to the party to whom such notice or other communication shall
have been directed, (b) if mailed by certified or registered mail with postage prepaid, return receipt requested, on the third business day after the date on which it is so mailed, (c) one business day after the business day of deposit
with a nationally recognized overnight delivery service, specifying next day delivery, with written verification of receipt, or (d) on the same day as delivered by confirmed facsimile transmission if delivered during business hours or on the
next successive business day if delivered by confirmed facsimile transmission after business hours. Addresses for notice to either party shall be as shown on the signature page of this Agreement, or to such other address as may have been furnished
by either party in the manner set forth above. 
 22. Governing Law. This Agreement shall be governed exclusively by and construed
according to the laws of the State of Delaware as applied to contracts between Delaware residents entered into and to be performed entirely within Delaware. This Agreement is intended to be an agreement of the type contemplated by
Section 145(f) of the General Corporation Law of Delaware. 
 23. Counterparts. This Agreement may be executed in one or more
counterparts, each of which shall for all purposes be deemed to be an original but all of which together shall constitute one and the same Agreement, and electronically transmitted signatures shall be valid. 

The parties hereto have entered into this Indemnification Agreement, including the undertaking contained herein, effective as of the date
first above written. 
  

									
	Indemnitee:	 		 	The Company:
			
		 		 	XTERA COMMUNICATIONS, INC.
				
	  
	 		 		 	
		 		 		 	By:	 	 
					
	Address:	 	 	 		 	Name:	 	 
					
		 	 	 		 	Title:	 	 


  
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