Filing Pursuant to Rule 424(b)(3)
                                            Registration Statement No. 333-48536


               PROSPECTUS SUPPLEMENT NO. 1 DATED FEBRUARY 9, 2001
                     TO PROSPECTUS DATED JANUARY 22, 2001

                       TERAYON COMMUNICATION SYSTEMS, INC.

                                   $500,000.00

      of 5% Convertible Subordinated Notes Due 2007 and 5,951,673 Shares of
               Common Stock Issuable Upon Conversion of the Notes

Please read this prospectus supplement in conjunction with the prospectus dated
January 22, 2001 (the "Prospectus"). The table on pages 21 thru 24 of the
Prospectus setting forth information concerning the selling holders is
superseded by the following table:

                                SELLING HOLDERS

We originally issued the Notes and the Notes were sold by the initial purchasers
in a transaction exempt from the registration requirements of the Securities Act
to persons reasonably believed by the initial purchasers to be qualified
institutional buyers or other institutional accredited investors. Selling
holders, including their transferees, pledgees or donees or their successors,
may from time to time offer and sell pursuant to this prospectus any or all of
the Notes and common stock into which the Notes are convertible. We agreed to
use reasonable efforts to keep the registration statement effective until July
26, 2002. Our registration of the Notes and the shares of common stock into
which the Notes are convertible does not necessarily mean that the selling
holders will sell any or all of the Notes or the shares of the common stock into
which the Notes are convertible.

The following table sets forth information, as of February 9, 2001, with respect
to the selling holders and the principal amounts of Notes beneficially owned by
each selling holder that may be offered under this prospectus. The information
is based on information provided by or on behalf of the selling holders. The
selling holders may offer all, some or none of the Notes or common stock into
which the Notes are convertible. Because the selling holders may offer all or
some portion of the Notes or the common stock, no estimate can be given as to
the amount of the Notes or the common stock that will be held by the selling
holders upon termination of any sales. In addition, the selling holders
identified below may have sold, transferred or otherwise disposed of all or a
portion of their Notes since the date on which they provided the information
regarding their Notes in transactions exempt from the registration requirements
of the Securities Act.



                                           Principal Amount       Common Stock
                                               of Notes             Issuable
                                          Beneficially Owned    upon Conversation    Common Stock
                  Selling Holder             and Offered        of the Notes (1)        Offered
---------------------------------------  --------------------  -------------------  --------------
                                                                           
AAM/Zazove Institutional Income               1,200,000               14,284             14,284


                                      S-1




                                           Principal Amount       Common Stock
                                               of Notes             Issuable
                                          Beneficially Owned    upon Conversation    Common Stock
                  Selling Holder             and Offered        of the Notes (1)        Offered
---------------------------------------  --------------------  -------------------  --------------
                                                                           
Fund, L.P.
AIG Soundshore Opportunity Holding            2,488,000               29,615             29,615
   Fund Ltd. (2)

AIG Soundshore Strategic Holding              2,185,000               26,008             26,008
   Fund Ltd. (2)

Alexandria Global Investment Fund I LTD.      3,000,000               35,710             35,710

Arbitex Master Fund, L.P.                     4,500,000               53,565             53,565

Argent Classic Convertible Arbitrage         15,000,000              178,550            178,550
   Fund (Bermuda) L.P.

Argent Convertible Arbitrage Fund Ltd.        1,000,000               11,904             11,904

Aspen Global Technology Fund                    674,000                8,023              8,023

Associated Electric & Gas Insurance             850,000               10,117             10,117
   Services Limited

AST Janus Small Cap Growth Portfolio          8,185,000               97,429             97,429

Aventis Pension Master Trust                    440,000                5,237              5,237

Bank Austria Cayman Islands, Ltd.             5,500,000               65,468             65,468

Bank of America Securities, LLC               5,000,000               59,516             59,516

BankAmerica Pension Plan                      2,000,000               23,807             23,807

Black Diamond Offshore, Ltd.                    665,000                7,916              7,916

Boilermaker - Blacksmith Pension Trust        2,700,000               32,139             32,139

BS Debt Income Fund - Class A                    15,000                  178                178

CALAMOS(R) Convertible Portfolio -              150,000                1,785              1,785
   CALAMOS(R) Advisors Trust

CALAMOS(R) Convertible Technology Fund          390,000                4,642              4,642
   - CALAMOS(R) Investment Trust

CALAMOS(R)High Yield Fund -                     390,000                4,642              4,642
   CALAMOS(R) Investment Trust

Canyon Capital Arbitrage Master Fund          1,000,000               11,904             11,904

Canyon Value Realization (Cayman) Ltd.       11,000,000              130,937            130,937


                                      S-2




                                                       Principal Amount          Common Stock
                                                           of Notes                Issuable                 Common
                                                      Beneficially Owned        upon Conversation            Stock
          Selling Holder                                 and Offered            of the Notes (1)            Offered
-------------------------------------------------------------------------------------------------------------------------
                                                                                                   
CFFX, LLC                                                  1,000,000                 11,904                  11,904

CIBC World Markets                                         5,500,000                 65,468                  65,468

City of Albany Pension Fund                                  245,000                  2,916                   2,916

City of Knoxville Pension System                             640,000                  7,618                   7,618

Clinton Riverside Convertible Portfolio Limited            2,100,000                 24,997                  24,997

Cova Bond Debenture Fund                                     500,000                  5,952                   5,952

Credit Research & Trading LLC                             14,840,000                176,645                 176,645

Daiwa Securities America Inc. (2)                         17,500,000                208,308                 208,308

Deeprock + Co.                                             2,000,000                 23,807                  23,807

Delphi Financial Group, Inc.                                 500,000                  5,952                   5,952

Delta Airlines Master Trust                                4,900,000                 58,326                  58,326

Delta Pilots Disability Survivorship Trust                   200,000                  2,380                   2,380

Department of Fire & Police Pensions Systems               7,075,000                 84,216                  84,216

Deutsche Bank Securities Inc.                             56,134,000                668,182                 668,182

Double Black Diamond Offshore, LDC                         2,708,000                 32,235                  32,235

Duckbill + Co.                                               630,000                  7,500                   7,500

ECT Investments, Inc.                                      1,000,000                 11,903                  11,903

Elf Aquitaine                                                150,000                  1,786                   1,786

Florida Street Bond Fund                                   1,000,000                 11,903                  11,903

Fuji U.S. Income Open                                        500,000                  5,952                   5,952

General Motors Employees Global                            6,175,000                 73,503                  73,503

General Motors Welfare Benefit Trust (St. Veba)            2,000,000                 23,807                  23,807

Greek Catholic Union II                                       45,000                    535                     535

IBM Retirement Plan - High Income                            920,000                 10,951                  10,951

Ilanot Batucha Investment House LTD                          300,000                  3,571                   3,571


                                      S-3




                                                      Principal Amount            Common Stock
                                                          of Notes                  Issuable                Common
                                                      Beneficially Owned        upon Conversation            Stock
          Selling Holder                                and Offered              of the Notes (1)           Offered
-------------------------------------------------------------------------------------------------------------------------------
                                                                                                  
Israel Brokerage & Investments IBI LTD                       100,000                  1,190                   1,190

J.P. Morgan Securities, Inc.                              23,597,000                280,883                 280,883

Janus Global Technology Fund                              16,665,000                198,370                 198,370

Janus Venture Fund                                        19,025,000                226,462                 226,462

Jefferies & Co.                                              875,000                 10,415                  10,415

Jersey (IMA) Ltd.                                            250,000                  2,976                   2,976

JMG Capital Partners, L.P.                                13,000,000                154,743                 154,743

JMG Triton Offshore Fund, Ltd.                            31,500,000                374,955                 374,955

Julius Baer Securities, Inc.                                 250,000                  2,975                   2,975

JWF Global Technology Fund                                 1,154,000                 13,737                  13,737

JWF US Venture Fund                                        1,990,000                 23,688                  23,688

KBC Financial Products USA Inc.                            4,500,000                 53,565                  53,565

Kentfield Trading, Ltd.                                    3,800,000                 45,232                  45,232

Kettering Medical Center Funded Depreciation Acccount        160,000                  1,904                   1,904

Knoxville Utilities Board Retirement System                  400,000                  4,761                   4,761

Lehman Brothers Inc.                                      18,500,000                220,211                 220,211

Leonardo, L.P,                                            12,000,000                142,840                 142,840

LibertyView Funds L.P.                                       750,000                  8,928                   8,928

Lonestar Partners, L.P.                                    4,500,000                 53,565                  53,565

Lord Abbett Bond Debenture Fund                            5,850,000                 69,635                  69,635

Louisiana Workers' Compensation Corporation                  360,000                  4,285                   4,285

Lumber Industries, Inc.                                      750,000                  8,927                   8,927

Lydian Overseas Partners Master Fund                      15,000,000                178,551                 178,551

Magten Asset Management Corp. Pension Plan & Trust           485,000                  5,773                   5,773

Magten Group Trust                                           300,000                  3,571                   3,571

McMahan Securities Co. L.P.                                1,000,000                 11,904                  11,904


                                      S-4




                                                        Principal Amount         Common Stock
                                                            of Notes               Issuable
                                                       Beneficially Owned      upon Conversation        Common Stock
                  Selling Holder                          and Offered          of the Notes (1)            Offered
---------------------------------------------------   -------------------      -----------------        ------------
                                                                                               

Merrill, Lynch, Pierce, Fenner and Smith, Inc.                16,000                    190                    190

Morgan Stanley & Co.                                       2,500,000                 29,758                 29,758

Nomura Securities International, Inc.                      1,000,000                 11,904                 11,904

Nomura/Janus Global Technology                             1,507,000                 17,939                 17,939

Oxford Lord Abbett + Co.                                   1,000,000                 11,904                 11,904

Pacific Life Insurance Company                             1,000,000                 11,904                 11,904

Peoples Benefit Life Insurance Company                     4,220,000                 50,233                 50,233

Peoples Benefit Life Insurance Company (Teamsters          6,250,000                 74,395                 74,395
   Separate Account)

Port Authority of Allegheny County                         2,825,000                 33,626                 33,626
   Retirement and Disability Allowance
   Plan for the Employees Represented byLocal 85
   of the Amalgamated Transit Union

Quattro Crestline Special Situations                         500,000                  5,951                  5,951

Quattro Fund                                               1,000,000                 11,904                 11,904

Ramus Capital Group Holdings, Ltd.                         1,300,000                 15,474                 15,474

RCG Latitude Master Fund, Ltd.                               200,000                  2,380                  2,380

Research Capital Corporation                               9,650,000                114,867                114,867

Retail Clerks Pension Trust                                2,000,000                 23,807                 23,807

Retail Clerks Pension Trust #2                             1,000,000                 11,904                 11,904

San Diego County Employee's                                3,930,000                 46,780                 46,780
   Retirement Association

SPT                                                        1,100,000                 13,093                 13,093

St. Albans Partners Ltd.                                   4,000,000                 47,613                 47,613

Standard Mortage Holding Corp.                               500,000                  5,951                  5,951

The Bakal Company Limited Partnership                        150,000                  1,785                  1,785


                                      S-5




                                           Principal Amount       Common Stock
                                               of Notes             Issuable
                                          Beneficially Owned    upon Conversation    Common Stock
                  Selling Holder             and Offered        of the Notes (1)        Offered
---------------------------------------  --------------------  -------------------  --------------
                                                                           
The Dow Chemical Company Employees'             5,325,000               63,385            63,385
   Retirement Plan

The Fondren Foundation                            165,000                1,964             1,964

TQA Master Fund, LTD                            1,000,000               11,904            11,904

TQA Master Plus Fund, Ltd.                        435,000                5,117             5,117

UBS AG, London Branch                          20,000,000              238,066           238,066

UBS Warburg AG                                  2,000,000               23,806            23,806

Unifi, Inc. Profit Sharing Plan and               255,000                3,035             3,035
   Trust

United Food and Commercial Workers              1,260,000               14,998            14,998
   Local 1262 and Employees Pension
   Fund

United Mizrahi Bank LTD                            50,000                  595               595

Valentis Investors LLC                          2,000,000               23,806            23,806

Value Realization Fund B, LP                      500,000                5,952             5,952

Value Realization Fund, L.P.                    8,000,000               95,227            95,227

Van Waters & Rogers, Inc.                         770,000                9,165             9,165
   Retirement Plan

Wasserstein Perella Securities Inc.             7,600,000               90,465            90,465

Worldwide Transactions, Ltd.                      127,000                1,512             1,512

Zurich HFR Master Hedge Fund Index Ltd.           300,000                3,571             3,571

Any other holders of Notes or future           30,910,000              368,004           368,004
   holders

Total                                        $500,000,000            5,951,673         5,951,673


(1)  Assumes a conversion rate of 11.9033 shares of common stock per $1,000
     principal amount of Notes and a cash payment in lieu of any fractional
     interest.

(2)  AIG Soundshare Strategic Holding Fund Ltd. and AIG Soundshare Opportunity
     Holding Fund Ltd. each hold 75 shares of our common stock, Daiwa Securities
     America Inc. holds 35,166 shares of our common stock and Lumber Industries,
     Inc. holds 4,000 shares of our common stock in addition to any shares they
     would acquire upon conversion of the Notes.

                                      S-6


(3)  Assumes that any other holders of Notes or any future transferee from any
     holder do not or will not beneficially own any common stock other than
     common stock into which the Notes are convertible at the conversion rate of
     11.9033 shares of common stock per $1,000 principal amount of Notes.

None of the selling holders nor any of their affiliates, officers, directors or
principal equity holders has held any position or office or has had any material
relationship with us within the past three years with the exception of Deutsche
Bank Securities Inc. and Lehman Brothers Inc. In the past three years, Deutsche
Bank and Lehman Brothers have acted as underwriters of the Company's initial
public offering and follow-on public offering and were initial purchasers in the
offering of the Notes. The selling holders purchased all of the Notes in a
private transaction. All of the Notes and the shares of common stock into which
the Notes are convertible are "restricted securities" under the Securities Act.

Information concerning the selling holders may change from time to time and any
changed information will be set forth in supplements to this prospectus if and
when necessary. In addition, the conversion price, and therefore, the number of
shares of common stock issuable upon conversion of the Notes, is subject to
adjustment under certain circumstances. Accordingly, the aggregate principal
amount of Notes and the number of shares of common stock into which the Notes
are convertible may increase or decrease.

          The date of this Prospectus Supplement is February 9, 2001.

                                      S-7