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EXHIBIT 10.15    
  

 
 

FIRST AMENDMENT TO SUBLEASE AGREEMENT    
  

        THIS FIRST AMENDMENT TO SUBLEASE AGREEMENT (this "Amendment") is made as of the 30th day of September, 2001, by and between Ciphergen Biosystems,
Inc., a Delaware corporation ("Sublessor") and BigBand Networks, Inc., a Delaware corporation ("Sublessee"), with reference to the following facts and objectives: 

 
 

RECITALS    
  

        A.    Sublessor,
as tenant, and John Arrillaga, Trustee or his Successor Trustee, UTA dated 7/20/77 (John Arrillaga Survivor's Trust) as amended, and Richard T. Peery, Trustee
or his Successor Trustee, UTA dated 7/20/77 (Richard T. Peery Separate Property Trust) as amended, as landlord ("Master Lessor"), entered into that certain lease, dated as of January 28, 2000,
pertaining to certain premises located at 6607 Dumbarton Circle, Suite 200, Fremont, California (the "Master Premises"). 

        B.    Sublessor
subleased a portion of the Master Premises to Sublessee (the "Premises"), under a Sublease Agreement dated as of August 25, 2000, as amended by a memo
dated January 2, 2001 (as amended, the "Sublease"). 

        C.    Sublessee
desires to (i) reduce the size of the Premises; (ii) reduce the rent payable under the Sublease; (iii) post a reduced security deposit with Sublessor; (iv)
obtain one (1) option to extend the term of the Sublease by up to an additional one (1) year period for the agreed to approximately 8,000
square foot portion of the original premise; and (v) in consideration for the foregoing, pay an amendment fee to Sublessor, all as more particularly set forth herein. 

 
 

AGREEMENT    
  

        NOW, THEREFORE, in consideration of good and valuable consideration, including the payment to Sublessor as set forth in Paragraph 5 hereof the sufficiency of
which is hereby acknowledged, the parties hereto agree as follows: 

        1.    Effective Date.    As used herein, the term "Effective Date" shall mean the later of (i) October 1, 2001
and (ii) the date Master Lessor consents to this Amendment as set forth in Paragraph 11 hereof. 

        2.    Premises.    As of the Effective Date, the Premises shall be reduced to the approximately 8,000 square foot
portion of the original Premises shown on Exhibit A attached hereto. On or before the Effective Date, Sublessee shall surrender that portion of the
original Premises which will not be part of the reduced Premises as described on Exhibit A, in broom clean condition, with all of its furniture,
fixtures and equipment removed and otherwise in accordance with the terms of the Sublease. As of the Effective Date, the portion of Paragraph 2 of the Sublease which reads: "30,488 sq. ft. section of
a larger 60,720+/- sq. ft. single story office/R&D building" shall be deleted and replaced with the following: 

"8,000
sq. ft. section of a larger 60,720+/- sq. ft. single-story office/R&D building all as more particularly described on Exhibit A attached hereto
and incorporated herein. Sublessee shall also have the non-exclusive right to use the reception area, kitchen and bathroom facilities located closest to the Premises. The parties hereto acknowledge
and agree that (i) the Premises are not separately demised from the remainder of the building in which the Premises are located, and (ii) Sublessee shall have no right to use, and shall prevent its
agents, employees, contractors, invitees or licensees from using, any portions of the building in which the Premises are located other than the Premises and the aforementioned bathrooms, reception
area and kitchen facilities as expressly 

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set forth herein. The entry by Sublessee or its agents, employees, contractors, invitees or licensees into any other areas shall constitute a default hereunder. All measurements of area contained in
this Sublease are conclusively agreed to be correct and binding upon the parties, and any subsequent determination that the area is more or less than shown in this Sublease shall not result in a
change in any of the computations of rent or other matters described in this Sublease where area is a factor." 

As
of the Effective Date, Exhibit A attached hereto shall become Exhibit A to the Sublease. 

        3.    Base Rent.    As of the Effective Date, the second sentence of Paragraph 4.1 of the Sublease shall be deleted
and replaced with the following: 

"Commencing
on October 1, 2001 through March 31, 2002, Sublessee shall pay to Sublessor as Base Rent for the Premises equal monthly payments of Thirty-five Thousand Dollars ($35,000)." 

        4.    Operating Expenses.    As of the Effective Date, Paragraph 13 of the Sublease shall be deleted and replaced with
the following: 

"Sublessee
shall continue to use the Premises in the same manner as Sublessee used the Premises prior to October 1, 2001, including, without limitation, using the same level and intensity of
utilities. Sublessee shall not be responsible for the payment of real property taxes, building insurance, common area maintenance or similar operating expenses which accrue on or after October 1,
2001; provided, however, that if Sublessor reasonably determines that Sublessee uses utilities in excess of the amount of utilities used by Sublessee prior to October 1, 2001, then, in addition to
Sublessor's other rights and remedies, Sublessee shall pay for such extra use an amount reasonably determined by Sublessor to cover the cost of such extra use." 

        5.    Buy-Out Payment.    Sublessee acknowledges that, in entering into this Amendment, Sublessor will significantly
reduce the amount of the payments it will receive from Sublessee under the Sublease. In consideration for Sublessor's agreement to enter into this Amendment and forego such additional payments,
Sublessee has agreed to pay to Sublessor prior to the Effective Date a fee in the amount of Three Hundred Thirty-Two Thousand Three Hundred Nineteen and 20/100 Dollars ($332,319.20)(the "Buy-Out
Payment"). The parties acknowledge that Sublessee, upon execution of the Sublease, deposited with Sublessor a security deposit in the amount of the Buy-Out Payment (the "Original Security Deposit").
In lieu of Sublessee making to Sublessor a cash payment of the Buy-Out Payment, Sublessor shall retain the full amount of the Original Security Deposit. Such amount shall be fully earned as of the
Effective Date, Sublessor shall have no obligation to return any portion of the Original Security Deposit, and the amount deposited as the Original Security Deposit shall no longer serve as a security
deposit under the Sublease. 

        6.    New Security Deposit; Liquidated Damages.    Upon execution of this Amendment, Sublessee shall deposit with
Sublessor a new security deposit under the Sublease in the amount of Two Hundred Thousand Dollars ($200,000). As of the Effective Date, (a) the reference in Section 5 of the Sublease to "$332,319.20"
shall be changed to "$200,000" and (b) the following shall be added as Paragraph 5.1 to the Sublease: 

        5.1    Liquidated Damages.    IF SUBLESSEE FAILS TO PERFORM ITS OBLIGATIONS HEREUNDER, THEN SUBLESSOR WILL SUSTAIN
SUBSTANTIAL DAMAGES RESULTING FROM SUCH FAILURE. SUBLESSEE AND SUBLESSOR AGREE THAT IT WOULD BE IMPRACTICABLE OR EXTREMELY DIFFICULT TO FIX THE ACTUAL DAMAGES SUSTAINED BY THE EVENT OF A DEFAULT
HEREUNDER BY SUBLESSEE. THEREFORE, SUBLESSEE AND SUBLESSOR
AGREE THAT IF SUBLESSEE COMMITS SUCH A DEFAULT, THE SECURITY DEPOSIT REPRESENTS A REASONABLE ESTIMATE OF THE AMOUNT OF DAMAGES FOR SUCH DEFAULT, AND SUBLESSOR SHALL BE ENTITLED TO RECOVER SUCH AMOUNT
AS LIQUIDATED DAMAGES FOR 

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SUCH DEFAULT. BOTH PARTIES ACKNOWLEDGE AND AGREE THAT SAID AMOUNT IS PRESENTLY A REASONABLE SUM CONSIDERING ALL OF THE CIRCUMSTANCES EXISTING ON THE DATE OF THIS SUBLEASE, INCLUDING THE RELATIONSHIP
OF THE AMOUNT TO THE RANGE OF HARM TO SUBLESSOR THAT REASONABLY COULD BE ANTICIPATED TO INCUR, AND THAT PROOF OF ACTUAL DAMAGES WOULD BE COSTLY AND EXTREMELY DIFFICULT OR IMPRACTICABLE. 

        7.    Use.    As of the Effective Date, the following sentence shall added to the end of Paragraph 6.1 of the
Sublease: 

"Each
party hereto agrees to have its representative meet with the representative of the other party on a monthly basis to discuss in good faith any issues related to the use or occupancy of the
Premises and of any common areas associated therewith." 

        8.    Option to Extend.    As of the Effective Date, the following shall be added as Paragraph 14 of the Sublease: 

        14.    Extension Right.    If Sublessee has not been in default of any term or provision of this Sublease and has not
assigned this Sublease or sub-sublet any space covered thereby or agreed to do so in the future, Sublessee shall have one (1) option (the "Extension Option") to extend the term of the Sublease with
respect to the entirety of the Premises for an additional period of up to one (1) year commencing when the then-existing term of the Sublease expires (the "Extension Period"), solely in accordance
with the terms of this section, and subject to the following conditions: 

        (i)    The
Extension Option shall be exercised, if at all, by written notice of exercise delivered to Sublessor by Sublessee not more than one hundred twenty (120) nor less
than ninety (90) days prior to the expiration of the initial Sublease term. 

        (ii)  Sublessee
shall accept the Premises on an "AS-IS" basis. 

        (iii)  Base
Rent during the Extension Period shall be as set forth in Paragraph 4.1 of this Sublease, as amended by the First Amendment to Sublease. 

        (iv)  During
the Extension Period, either party may terminate this Sublease by delivering written notice to the other party setting forth the date of such early termination,
which termination date shall not be less than ninety (90) days after the date of such notice. 

        (v)  All
other terms and conditions of this Sublease shall remain in effect during the Extension Period. 

        (vi)  Anything
herein to the contrary notwithstanding, if Sublessee is in default under any of the terms, covenants or conditions of this Sublease, either at the time
Sublessee exercises the Extension Option or at any time thereafter prior to or upon the commencement date of the Extension Period, Sublessor shall have, in addition to all of Sublessor's other rights
and remedies provided in this Sublease, the right to terminate the Extension Option upon notice to Sublessee. 

        9.    Relocation Right.    As of the Effective Date, the following shall be added as Paragraph 15 to the Sublease: 

        15.    Relocation Right.    Anything in this Sublease to the contrary notwithstanding, Sublessor shall have the right,
at any time and from time to time during the Sublease term, to relocate the Premises in whole or part to other space in the building; provided, however, if Sublessor so relocates Sublessee, then
Sublessor shall pay for the reasonable costs of moving Sublessee from the Premises to the new Premises; and provided further that in no event shall Sublessor relocate Sublessee's "Demonstration
Center." Following such relocation, the Premises, as used in this Sublease, shall mean the new Premises to which Sublessee is relocated and Exhibit A
shall be 

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revised to reflect the new Premises. If, upon 90 days written notice, Sublessor relocates Sublessee to a new location, then the terms and conditions of this Sublease shall remain in full force and
effect, except that if the new Premises to which Sublessee is relocated is not the same size as the Premises immediately prior to such relocation, then the Base Rent payable by Sublessee shall be
adjusted accordingly based on the relative size of the new premises. 

        10.    Master Lessor's Consent.    This Amendment and Sublessor's obligations hereunder are conditioned upon
Sublessor's receipt of the written consent of Master Lessor in a form reasonably acceptable to Sublessor. If Sublessor does not receive such consent within thirty (30) days after execution of this
Amendment by Sublessor, then Sublessor may terminate this Amendment by giving Sublessee written notice thereof. 

        11.    Miscellaneous.    This Amendment, together with the Sublease, constitutes the entire agreement between
Sublessor and Sublessee regarding the Sublease and the subject matter contained herein and supersedes any and all prior and/or contemporaneous oral or written negotiations, agreements or
understandings. This Amendment shall be binding upon and inure to the benefit of Sublessor and Sublessee and their respective heirs, legal representatives, successors and assigns. No subsequent change
or addition to this Amendment shall be binding unless in writing and duly executed by both Sublessor and Sublessee. Except as specifically amended hereby, all of the terms and conditions of the
Sublease are and shall remain in full force and effect and are hereby ratified and confirmed. 

        IN
WITNESS WHEREOF, the parties have executed this Amendment, by their duly authorized signatories, as of the day and year first above written. 

	SUBLESSOR:	 	SUBLESSEE:
	

CIPHERGEN BIOSYSTEMS, INC.,

a Delaware corporation	
 	

BIGBAND NETWORKS, INC.,

a Delaware corporation
	

By:	

/s/ [illegible]
	
 	

By:	

/s/ [illegible]

	

Title:	

CFO
	
 	

Title:	

Chief Operating Officer

4

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EXHIBIT 10.15

FIRST AMENDMENT TO SUBLEASE AGREEMENT

RECITALS

AGREEMENTQuickLinks
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	[*]	=	 	CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

 
 

Exhibit 10.29    
  

February
27, 2001 

Dick
Rubin

Ciphergen Biosystems, Inc.

6611 Dumbarton Circle

Fremont, California 94555 

Re:
OEM Agreement 

Dear
Dick, 

This
letter will outline the proposed OEM arrangement between Ciphergen and Salford Systems. Based on our meeting this morning, we propose that the arrangement take on the attributes similar to a
reseller relationship wherein Ciphergen is positioned to both profit as a value added reseller for Salford Systems' product, CART® (and MARSTM). And Ciphergen also has the
option to market off any positive Industry/media history. Salford Systems has attained in the past 15 years to help reinforce the pedigree of the proposed software offering. 

The
discount availed to Ciphergen will work on a sliding scale, increasing as the sales volume increases. The following table designates the discount scale based on number of units purchased for
resale: 

	Number of Units
	 	Discount from List

	15	 	[*]
	30	 	[*]
	45	 	[*]
	60 and above	 	[*]

The standard unit shall be a 64 mb CART Pro 4.0 1-5 user site license with a list price of [*] (or like updates to future versions). Should the required
units differ from the suggested standard, the discount will be applied based on revenue accumulation, which will mirror the suggested standard units. Ciphergen will resell at manufacturer's suggested
list. Salford will notify Ciphergen of price changes 30 days prior to effect. The software is a license for one year, and is subject to [*] annual renewable license fee.
The discount passed to Ciphergen for the renewal fees will be determined by the unit summation, but renewals will not add to the unit summation. 

Ciphergen
will purchase an initial inventory of four copies of CART, which will approximate $[*]. We suggest the purchase of four CART Pro 4.0. 64 mb, 1-5 user site licenses at
$[*] each, for a total of $[*]. This amount will be subject to the initial discount of [*] net amount being
$[*] and shall apply to the inventory count toward greater discounts. Terms on all purchases shall be net 30 days. It is acknowledged that this initial purchase is
constructed to help contribute toward Salford's cost of development of the API. 

The
API has been developed to date by Salford will be further refined to the specific requirements for Ciphergen by joint development efforts between the two companies. Salford will provide sales and
all technical support for the initial 15 sales. Ciphergen will progressively take on most routine tech support (installation and elementary questions commonly answered by Salford's FAQs). Salford will
always provide advanced technical support for issues not addressed by published FAQs. Salford reserves the right to add repeating technical questions to its published FAQs. 

After
placement of the first OEM order, Salford will provide initial training for up to 5 Ciphergen personnel at Salford's offices at no charge. This training will consist of 3 days of coursework
normally 

offered in Salford's intro to CART and Advanced CART courses. Ciphergen will be awarded a flat fee of $[*] for any Salford course sold to its customer(s) at full list. 

The
above terms and conditions are proposed in anticipation of perfecting a joint agreement between the parties. We look forward to your response. 

Best
Regards, 

Gary
Anderson

Account Executive 

23
March 

Gary
Anderson

Salford Systems

8880 Rio San Diego, Suite 1045

San Diego, CA 92108 

Dear
Gary: 

Thank
you for your OEM proposal of 27 February 2001 concerning Salford Systems' CART® (and MARSTM) program. 

Ciphergen
Biosystems, Inc. (CBI) is prepared to accept your proposal with the following clarifying terms: 

	1.	 	Ciphergen will initially purchase four CART Pro 4.0, 64 mb 1-5 user site license packages per your quotation of 22 March 2001. These packages will include the API and instruction manual changes to rename the product,
"Biomarker Classification Analysis ToolTM" or B- CAT for short. You can carry through the 4.0 version designation as you see fit. Contact information embedded in the program and manual should reference:
	

 	
 	

Ciphergen Biosystems, Inc.

6611 Dumbarton Circle

Fremont, CA 94555
	 	 	Tel:	(510) 505-2100
	 	 	Fax:	(510) 505-2101
	 	 	Email:	support@ciphergen.com
	

2.	
 	

The package will also contain a modification to give an on-screen 60-day warning of the impending license expiration date. The message dialog will instruct users to contact CBI to purchase the license extension. CBI will carry no fiscal
responsibility for un-renewed licenses. For any clients whose license expires and, at some later date, wishes to purchase a renewal there will be no penalty fees added to the renewal price.
	

3.	
 	

At this time, CBI is undertaking no commitment to joint development of the API. However, in good faith, we wish to express our interest in working with Salford Systems to improve the application of the package for CBI's customers as packages are
placed and customer feedback is registered.

If these terms are agreeable, please sign below and return a copy of this agreement. 

We
look forward to a mutually beneficial relationship between our companies. 

Sincerely
yours, 

Richard
B. Rubin

Director of Marketing

Ciphergen Biosystems, Inc. 

	Agreed to by:	 	 
	

  Signature	
 	

  Date
	

  Printed Name	
 	

 
	

  Position	
 	

 
	

  Company	
 	

 

	

[*]	

=	
 	

CERTAIN INFORMATION ON THIS PAGE HAS BEEN OMITTED AND FILED SEPARATELY WITH THE COMMISSION. CONFIDENTIAL TREATMENT HAS BEEN REQUESTED WITH RESPECT TO THE OMITTED PORTIONS.

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Exhibit 10.29

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