BigBand Networks, Inc. – Indentures Watch

from S-1/A 2 pages Number BBND- 0001 Incorporated Under the Laws of the State of Delaware This Certifies That Proof Is the Record Holder of Fully Paid and Non-Assessable Shares of Common Stock, $0.001 Par Value Per Share, of BigBand Networks, Inc. Transferable on the Books of the Corporation in Person or by Duly Authorized Attorney Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Until Countersigned by the Transfer Agent and Registered by the Registrar. Witness the Facsimile Seal of the Corporation and the Facsimile Signatures of Its Duly Authorized Officers. Dated: Xxxxxxx Secretary Bigband Networks BigBand Networks, Inc. Bigband Networks Inc. Incorporated Seal December 3,1998 Delaware Shares Cusip 089750 50 9 See Reverse for Certain Definitions Xxxxxx Vice President Countersigned and Registered: Mellon Investor Services LLC Transfer Agent and Registrar By: Authorized Signature

from S-1 16 pages BigBand Networks. Inc. Warrant to Purchase Shares of Series E-1 Preferred Stock

from S-1 16 pages BigBand Networks, Inc. Warrant to Purchase 727,273 Shares of Series C Preferred Stock

from S-1 10 pages BigBand Networks, Inc. Warrant to Purchase Class B Nonvoting Common Stock

from S-1 42 pages Fifth Amended and Restated Investors Rights Agreement