Exhibit 10.20B
  SUB-LEASE AGREEMENT
 Made and Entered into on the 23rd of February, 2011.
 Between:
    
    BigBand Networks Ltd.A Private Regd. Co. No. 512751074
(hereinafter: the Lessee);
 The First Party
 And:
    
    Prime Sense Ltd.A Private Regd. Co. No. 513684761
(hereinafter: (the Sub-Lessee);
 The Second Party
 Whereas
    
    On 25/07/2007 a Lease Agreement was signed between U. Dori
Engineering Works Co., Ltd. (hereinafter: U. Dori) and the
Lessee (hereinafter: the Original Lease Agreement) for a period
starting on 01/02/2008 and ending on 31/01/2013 relating to a unit
in an area of approximately 6,580 m2 gross, plus store
rooms and parking places, in the building known as Arazim House
located at 28 Habarzel Street in Ramat Hachayal, Tel Aviv, and
known as Parcel 108 in Block 6639 (hereinafter: the Leased
Premises);The Original Lease Agreement, including the Management Agreement
and the other appendices are attached hereto as Appendix A of this
Agreement and constitute an integral part hereof; andWhereas
    
    U. Dori has assigned all its rights and obligations under the
Original Lease Agreement to Clal Insurance Co., Ltd., a Public
Registered Company No. 520024647 (hereinafter: the Lessor),
pursuant to a document of assignment of rights, a copy of which is
attached hereto




---



##### 



as Appendix B of this Agreement and constitutes an
integral part hereof; andWhereas
    
    The Lessor has provided its permission and consent to the Lessee
to lease out the Leased Premises and/or to give a right of use
and/or possession in a part/parts of the Leased Premises to the
Sub-Lessee, pursuant to the written consent, a copy of which is
attached hereto as Appendix C of this Agreement; andWhereas
    
    The Sub-Lessee and the Lessee have executed a Sublease Agreement
on December 4, 2008 in which the Sub-Lessee has rented from the
Lessee an area of approximately 1,645 m2 gross and also
35 parking places included in the Leased Premises (the First
Sublease Agreement) (including additional 15 parking spaces as of
January 23, 2009), andWhereas
    
    The Sub-Lessee is interested in the renting of additional
approximately 1,430 m2 area in the first floor of the
Leased Premises and also additional 50 parking places included in
the Leased Premises as marked in the plans of the Sub-Leased
Premises attached hereto as Appendix D of this Agreement and
constituting an integral part hereof (hereinafter: the Sub-Leased
Premises) and the Lessee is interested in renting out the
Sub-Leased Premises to the Sub-Lessee as stipulated, all in
accordance with the terms and conditions detailed below in this
Agreement; andWhereas
    
    The parties have agreed between them that the Sub-Lease which is
the subject matter of this Agreement will not be a lease protected
under the Law;
 Therefore It Is Declared and Stipulated Between the Parties as Follows:




---



##### 



1.
    
    The preamble and the appendices attached to this Agreement constitute an integral part of the
body of the Agreement.2.
    
    The provisions of the Original Lease Agreement and all of its appendices, including the
Management Agreement, shall apply, in full, mutatis mutandis, with respect of the area of the
Sub-Leased Premises under this Agreement.3.
    
    The Original Lease Agreement: The Sub-Lessee undertakes that, save where otherwise
stated in this Agreement in all matters relating to the Sub-Leased Premises, the Sub-Lessee
shall be responsible for the fulfillment of all the obligations and undertakings imposed on
the Lessee under the Original Lease Agreement and all of its appendices, mutatis mutandis, and
that wherever the Original Lease Agreement refers to the Sub-Leased Premises and where the
word Lessee is mentioned, the Sub-Lessee must be referred to, and all being in accordance
with the context of such, and all of the abovementioned in this section 3 shall not derogate
from the provisions of the First Sublease Agreement.4.
    
    The Purpose of the Sub-Lease: The Sub-Lessee undertakes to use the Sub-Leased
Premises only for the purpose of high tech industries. The Lessee declares that the Sub-Leased
Premises pursuant to its designation is appropriate for the purpose of the Sub-Lease.5.
    
    The Rent: The monthly rent under this Agreement: NIS Sixty-Eight (68)per
m2, is linked to the change of the Consumer Price Index known on the date of
payment compared with the Basic Index which is the index for the month of December 2010
published on 15/01/2011, plus VAT as required by law, plus NIS Four Hundred and Forty (440)
for each one of the 50 parking places, linked to the change of the Consumer Price Index known
on the date of payment compared with the Basic Index which is the index for the month of March
2007 published on 15/04/07, plus VAT as required by law, (the rent, including payment for the
parking places, linkage differential accruals to the index and VAT, shall hereinafter be
referred to as: the Rent). The Sub-Lessee will pay the Rent in advance for every 3 months
of lease plus VAT as required by law, by the 5th of the first month, for such 3
months.




---



##### 



All payments for the Rent as defined below shall be paid into Account No. 307500/02
managed at the 804 branch of Bank Leumi in the name of the Lessee.In the event that the Lessee wishes to vacate the Leased Premises, or any part thereof, and
the Sub  Lessee wishes to lease additional space within the Leased Premises, the Lessee
would reasonably assist the Sub  Lessee in a way of addressing the Lessor and raising the
option to enable the Sub Lessee to lease additional space in the Leased Premises directly
from the Lessor. Without derogating from the aforementioned, in the event that the Lessee
wishes to sub lease to third parties any further space, or parts thereof, in addition to the
Sub Leased Premises, the Lessee shall make efforts (but shall not be committed to) notify
the Sub  Lessee.6.
    
    The Lease Term: The Lease Term shall start on March 1, 2011 and up until 31.01.2013
(hereinafter: the Lease Term). Without derogating from the above, the Sub  Lessee shall
have the right to begin the Adaptation Works listed in section 13 prior to the Lease Period,
subject to Lessors approval.7.
    
    Management Fees: The Sub-Lessee will pay the Facilone Co., Ltd. (the Management
Company) which provides management services for the building, additional management fees for
the Sub-Leased Premises as stated in the Management Contract which was signed between it and
the Management Company as part of the First Sublease Agreement, directly to the Management
Company for the providing of the management services to the Sub-Leased Premises as of the
beginning of the Lease Term. For the avoidance of doubt, the Management Agreement that was
signed between the Management Company and the Sub  Lessee will be amended to the extent
required only in accordance with the provisions of this Agreement, mutatis mutandis.8.
    
    Expenses: The Sub-Lessee will bear all taxes, levies, fees and other payments of any
kind and sort imposed and/or to be imposed in the future on the holders of possession of the
Sub-Leased Premises, for its share in the Sub-Leased Premises only, and also its proportionate
share in the expenses to be imposed, if any, on the common areas.9.
    
    Electricity, Water, Municipal Rates and Taxes, Telephone and Other Expenses:
Electricity, water, telephone expenses, municipal rates and taxes and any other expense




---



##### 



relating to the use of the Sub-Leased Premises and its operation will be paid by the
Sub-Lessee directly in accordance with its engagements with such entities and/or contracts
signed with them, as follows:Water expenses  Proportional in accordance with the area of the Sub-Leased
Premises.Electricity expenses  In accordance with actual consumption (measured by a separate
electricity meter to be installed in the Sub-Leased Premises by the Lessee and at the
expense of the Sub-Lessee), including additional costs for Air Conditioning that will be
charged separately from the regular monthly bill for electricity.Municipal rates and taxes  The Lessee will notify the Tel Aviv Municipality about
the Sub-Lease under this Agreement, however, it is clarified that the liability, for all
intents and purposes, for the payment of municipal rates and taxes in the Sub-Leased
Premises, including in the matter of the use thereof, is imposed on the Sub-Lessee only, and
will be in accordance with the use.Telephone  In accordance with actual consumption.10.
    
    Guarantee: To secure the fulfillment of the undertakings of the Sub-Lessee under this
Agreement and in accordance with the Original Lease Agreement including all its appendices,
the Sub-Lessee will provide the Lessee, at the time of the signing of this Agreement, with an
autonomous financial bank guarantee covering the amount of the Rent for a period of 4 months
(including Consumer Price Index linkage and VAT), namely, the sum of NIS 568,354In the event of the Lessee seeking to forfeit and/or set off any amount whatsoever from the
Guarantee, it will notify the Sub-Lessee in writing 14 days in advance of its intent, unless
delivering such notice was impossible or unreasonable under the circumstances of the matter.The Guarantee shall be returned to the Sub-Lessee within 30 days after the end of the Lease
Term under this Agreement, and after it is proven to the satisfaction of the Lessee that the
Sub-Lessee has complied with all its obligations and undertakings as stipulated above.




---



##### 



11.
    
    Assignment of Rights: It is clarified that the area of the Sub-Leased Premises is
leased for the use and needs of the Sub-Lessee only. The Sub-Lessee is not entitled to assign
or transfer all or part of its rights to any other party, in any way whatsoever. It is
clarified that the transfer of all and/or any part of the shares of the Sub-Lessee and/or the
sale of the activities of the Sub-Lessee and/or part thereof, will not be considered as a
transfer of rights for the purpose of this Agreement, and will not require the obtaining of
the prior written consent of the Lessee, provided that notice to that effect is delivered to
the Lessee; and the Lessee and/or the Lessor are not harmed as a result of such sale and/or
transfer.The Sub-Lessee shall be entitled to sub-lease part of the Sub-Leased Premises, provided that
it has obtained the prior written consent of the Lessor and the Lessee. The Lessee may
refuse such sub  lease on reasonable grounds and in writing only, including without
limitations in case that after a review of the sublessees financial condition, Lessee
determines that the sublessee does not satisfy Lessees reasonable expectations of financial
viability or in case Sub Lessee has not fulfilled any of his obligations under the First
Sublease Agreement. The Lessee will make reasonable efforts in order to assist the
Sub-Lessee in obtaining the Lessors approval for such sub-lease.12.
    
    Insurance: The parties agree that the Sub-Lessee will maintain, throughout the
Agreement Term, all the insurance policies as detailed in Appendix E (the Insurance Appendix)
of the Original Lease Agreement, and that the Sub  Lessee will provide the certification from
its insurer in accordance with the wording attached in the said Appendix E of the Original
Agreement of Lease.13.
    
    SignBoards: Subject to Lessors consent, the Sub-Lessee will be entitled to replace
the existing signboards in the lobby of the building in which the Sub-Leased Premises is
located that refers to the floor of the Sub-Leased Premises, with a signboard bearing the
Sub-Lessees logo. The Lessee undertakes, until the commencement of the Lease Term, to request
Lessor to remove, at Lessees expense, the signboard bearing its logo that refers to the floor
of the Sub-Leased Premises.14.
    
    Adaptation Works: Save for the adaptation works as set forth in AppendixE
(Adaptation Works), which will be executed at the responsibility and expense of the




---



##### 



Sub-Lessee, the Sub-Lessee shall not be entitled to make any internal or external changes or
additions to the Leased Premises, its installations and systems, without obtaining the prior
written consent of the Lessee and the Lessor. At the end of Lease Term, the Lessee will
vacate the Sub-Leased Premises of any object belonging to it and which has been placed by it
in the Sub-Leased Premises, save for those which have been agreed upon in advance to remain
in the Leased Premises at the end of the Lease Term. Notwithstanding the above said it is
clarified that the Sub-Lessee shall be entitled, without obtaining the prior written consent
of the Lessee and the Lessor, to introduce office furniture and equipment and mobile
equipment into the Sub-Leased Premises.The Sub- Lessee undertakes that every new electrical wiring that would be added to the
Sub-Leased Premises during the term of the Sub- Lease will be connected solely and
exclusively to the electrical gauge of the Sub Lessee.15.
    
    The Lessee undertakes to ensure the repair of any damage and/or breakage to the shell of the
Sub-Leased Premises and/or the systems in the building of which the Sub-Leased Premises
constitutes a part, such as the water, electricity, sewage systems, etc., which has been
caused by the Lessor and/or someone on its behalf and/or arising from a fault and/or defect in
the construction of the shell and/or the building of which the Sub-Leased Premises constitutes
a part, within 21 days from the date of notice of such in writing from the Sub-Lessee, and in
urgent cases  immediately upon the receiving of notice of such from the Sub-Lessee. In the
event the Lessee does not comply with its duties to repair such defects and faults under its
responsibility within 21 days, and in urgent cases  immediately, then the Sub-Lessee shall
be entitled, after having given the Lessee prior written notice of 7 days (or in urgent cases
  immediately), and after providing the Lessee the opportunity to repair the damage within
the aforesaid period of time, and after the Lessee has not done so, carry out any repair
and/or take any reasonable action to repair the damage and/or to bring the Leased Premises to
their previous condition.The Lessee will refund the Sub-Lessee the costs for the repairing of
the said damage against the presentation of receipts for the execution of the works.16.
    
    Eviction of the Sub Lease Premises:upon termination of the Sub Lease term, the Sub Lessee
will return the Sub  Leased Premises to the Lessee free and clear of all persons




---



##### 



and objects, in good and proper condition, in the same manner that was handed to the Sub 
Lessee excluding reasonable amortization.17.
    
    The Lessee undertakes, until the commencement of the Lease Term, to perform, at its expense
and responsibility, the following work:
 17.1
    
    To open an access door from the Sub-leased Premises to the toilets in the floor
in which the Sub-Leased Premises is located. This access door will be set-up in the
location as marked in the plans of the Sub-Leased Premises attached hereto as
Appendix D.17.2
    
    To separate the area of the Sub-Leased Premises from the remaining areas on the
floor in which the Sub-Leased Premises is located that are not part of the Sub-Leased
Premises, by three plaster walls. The abovementioned plaster walls will be set-up in
the locations as marked in the plans of the Sub-Leased Premises attached hereto as
Appendix D.
 In the event the Lessee shall not perform the aforementioned works until the commencement of
the Lease Term, the Sub-Lessee shall be entitled to perform the aforementioned works at its
expense, and to set-off its costs from any amount due and payable by it to the Lessee
pursuant to this Sub-lease Agreement.18.
    
    Any amendment to the terms and conditions of this Agreement or any waiver of the rights of a
party hereunder, will only be done in writing signed by those authorized to bind that party.19.
    
    Sub Lessee hereby acknowledges that this Agreement is subject to the approval of Lessor. The
Lessee will take reasonable commercial efforts to obtain the consent of the Lessor to this
Agreement prior to the execution of this Agreement by the parties hereto and will update the
Sub Lessee from time to time and upon request with respect to the development of the process
with the Lessor. It agreed and understood that in the event that Lessors consent to this
Agreement is not provided within 45 from the date of its execution, for any reason whatsoever,
each party will be entitled to immediately terminate this Agreement upon written notice to the
other party. Upon such termination




---



##### 



neither party shall have any claim against the other party including, without limitation,
any claim for damages, specific performance or any other remedy.20.
    
    Any notices required or permitted by this Agreement shall be in writing and shall be
delivered, with notice deemed given, as follows: (a) by personal delivery, when delivered
personally; (b) by certified or registered mail, return receipt requested, upon 72 hours after
pull postage payment have been fully paid in advance . Notice shall be sent to the contacts
and addresses set forth herein or to such other addresses as either party may specify in
writing.
  
  
 In Witness Whereof the Parties Have Set Their Hand:
 /s/ Rob Horton

The Lessee
    
    
    
    /s/ Avi Shadmi

The Sub-Lessee




---



##### 



Appendix A  The Original Lease Agreement
 Appendix B  Document of Assignment of Rights
 Appendix C  Lessors Consent
 Appendix D  Plans of the Area of the Sub-Lease and the Parking Places
 Appendix E  Adaptation Works