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                                                                     EXHIBIT 4.6

                                                                  EXECUTION COPY

                          FIRST SUPPLEMENTAL INDENTURE

                                 By and Between

                         METROMEDIA FIBER NETWORK, INC.

                                       and

                              THE BANK OF NEW YORK

                                   Dated as of

                               September 26, 2001

                            A SUPPLEMENTAL INDENTURE
                                    REGARDING

                            10% SENIOR NOTES DUE 2008

<PAGE>

                          FIRST SUPPLEMENTAL INDENTURE

         FIRST SUPPLEMENTAL INDENTURE dated as of September 26, 2001, between
Metromedia Fiber Network, Inc., a corporation duly organized and existing under
the laws of the State of Delaware (hereinafter called "METROMEDIA FIBER"), and
The Bank of New York, as successor to IBJ Schroder Bank & Trust Company, a
banking corporation existing under the laws of the State of New York, as trustee
(the "TRUSTEE").

         WHEREAS, Metromedia Fiber has heretofore executed and delivered to the
Trustee an indenture dated as of November 25, 1998 (hereinafter called the
"ORIGINAL INDENTURE") to provide for the issuance of its 10% Series A Senior
Notes due 2008 (the "SERIES A NOTES") and the 10% Series B Senior Notes due 2008
(the "SERIES B NOTES," together with the Series A Notes, the "NOTES");

         WHEREAS, Section 9.2 of the Original Indenture provides, among other
things, that, with the consent of the Holders of at least a majority in
aggregate principal amount of the Notes then outstanding, Metromedia Fiber and
the Trustee may enter into indentures supplemental to the Original Indenture for
the purpose of amending any provision of the Original Indenture or the Notes
(other than as provided in Section 9.2 of the Original Indenture);

         WHEREAS, Section 6.4 of Original Indenture provides, among other
things, that the Holders of at least a majority and aggregate principal amount
of the Notes then outstanding may by written to the Trustee may on behalf of the
Holders of all the Notes waive an existing Default (as defined in the Original
Indenture) and its consequences under the Indenture;

         WHEREAS, Metromedia Fiber is seeking a waiver of certain Defaults as
more further specified in Section 3.1 below;

         WHEREAS, Metromedia Fiber desires to amend and delete certain
provisions to the Original Indenture;

         WHEREAS, all action on the part of Metromedia Fiber necessary to
authorize its execution, delivery and performance of the Original Indenture, as
further supplemented by this First Supplemental Indenture, has been duly taken;

         WHEREAS, Metromedia Fiber has solicited the consent of the Holders of
the Notes to a certain amendment to the Original Indenture, including the waiver
set forth in Section 3.1 (the "AMENDMENT") pursuant to that certain Consent
Solicitation Statement of Metromedia Fiber dated August 22, 2001 (as amended,
the "CONSENT SOLICITATION STATEMENT");

         WHEREAS, Holders of at least a majority in aggregate principal amount
of the Notes have consented to the Amendment and instruments evidencing such
consent (constituting notice of the waivers set forth in Section 3.1 below) have
been delivered to the Trustee; and

         WHEREAS, Metromedia Fiber desires and has requested the Trustee to join
in the execution and delivery of this First Supplemental Indenture for the
purpose of amending the Original Indenture.

         NOW THEREFORE, in consideration of the premises and for other good and
valuable consideration, it is mutually covenanted and agreed for the equal and
ratable benefit of all Holders of the Notes as follows, effective upon execution
hereof by the Trustee:

                                   ARTICLE ONE

                                   DEFINITION
                                   ----------

         Section 1.1 DEFINITION. When used herein, "Consent Solicitation
Conditions Satisfaction" shall mean such time as Metromedia Fiber has become
obligated to pay the Consent Fee as that term is defined in, and pursuant to the
terms of, the Consent Solicitation Statement.

<PAGE>

                                   ARTICLE TWO

                        AMENDMENTS TO ORIGINAL INDENTURE
                        --------------------------------

         Section 2.1 AMENDED PROVISIONS.

         (a)      Upon the occurrence of the Consent Solicitation Conditions
Satisfaction, clause (f) of Section 4.9 of the Original Indenture shall be
amended and restated in its entirety to read as follows:

         (f)      the incurrence by (i) the Company or any of its Foreign
Subsidiaries of Purchase Money Indebtedness and (ii) any Restricted Subsidiary
that is not a Foreign Subsidiary of up to $500 million aggregate principal
amount of Purchase Money Indebtedness; PROVIDED that in each case such
Indebtedness shall not constitute more than 100% of the cost (determined in
accordance with GAAP in good faith by the Board of Directors of the Company) to
the Company, such Foreign Subsidiary or such Restricted Subsidiary that is not a
Foreign Subsidiary, as applicable, of the property so purchased, developed,
acquired, constructed, improved, or leased; PROVIDED, FURTHER, that in the case
of clause (ii) only, the Indebtedness that constitutes the Purchase Money
Indebtedness may not include Indebtedness incurred under credit agreements
entered into with bank lenders and similar financial institutions or
Indebtedness represented by a series of notes and debentures issued pursuant to
either a public offering of notes or debentures registered under the Securities
Act or private offering of notes or debentures to QIBs in a transaction exempt
from registration under the Securities Act in reliance on Rule 144A..

         (b)      Upon the occurrence of the Consent Solicitation Conditions
Satisfaction, the defined term "Purchase Money Indebtedness set forth in Section
1.1 of the Original Indenture shall be amended and restated in its entirety to
read as follows:

         "Purchase Money Indebtedness" means Indebtedness (including Acquired
Debt, in the case of leases, Capital Lease Obligations, mortgage financings and
purchase money obligations) incurred for the purpose of financing all or any
part of the cost of the engineering, construction, installation, acquisition,
lease (other than pursuant to a sale on a leaseback of Existing Assets),
development or improvement of any Telecommunications Assets used by the Company
or any Restricted Subsidiary, in the case of Indebtedness incurred by the
Company or any Restricted Subsidiary, or any Foreign Subsidiary in the case of
Indebtedness incurred by any Foreign Subsidiary, including any related notes,
Guarantees, collateral documents, instruments and agreements executed in
connection therewith, as the same may be amended, supplemented, modified or
restated from time to time.

         (c)      Upon the occurrence of the Consent Solicitation Conditions
Satisfaction, clause (i) of the defined term "Permitted Liens" set forth in
Section 1.1 of the Original Indenture shall be amended and restated in its
entirety to read as follows:

         (i) Liens to secure Indebtedness permitted by clauses (e), (f), (g) and
(h) of the second paragraph of Section 4.09 hereof on any Permitted Refinancing
Indebtedness, provided that with respect to Liens to secure Indebtedness
permitted by clause (f) thereof or any Permitted Refinancing Indebtedness of
such Indebtedness, such Lien must cover only the assets engineered, constructed,
installed, acquired, leased (other than pursuant to a sale and leaseback of
Existing Assets), developed or improved with such Indebtedness.

                                  ARTICLE THREE

                                     WAIVER
                                     ------

         Section 3.1 WAIVER. Upon the occurrence of the Consent Solicitation
Conditions Satisfaction, the Holders shall be deemed to have waived any existing
Default under, or Event of Default arising pursuant to, either Section 4.9 or
Section 4.12 of the Original Indenture.

                                       2
<PAGE>

                                  ARTICLE FOUR

                            MISCELLANEOUS PROVISIONS
                            ------------------------

         Section 4.1 EXECUTION AS SUPPLEMENTAL INDENTURE. This First
Supplemental Indenture is executed and shall be construed as an indenture
supplemental to the Original Indenture and, as provided in the Original
Indenture, this Supplemental Indenture forms a part thereof. Except as herein
expressly otherwise defined, the use of the terms and expressions herein is in
accordance with the definitions, uses and constructions contained in the
Original Indenture.

         Section 4.2 RESPONSIBILITY FOR RECITALS, ETC. The recitals herein shall
be taken as the statements of Metromedia Fiber, and the Trustee assumes no
responsibility for the correctness thereof. The Trustee makes no representations
as to the validity or sufficiency of this First Supplemental Indenture.

         Section 4.3 PROVISIONS BINDING ON COMPANY'S SUCCESSORS. All of the
covenants, stipulations, promises and agreements made in this First Supplemental
Indenture by Metromedia Fiber shall bind its successors and assigns whether so
expressed or not.

         Section 4.4. CONTINUING EFFECT. Except as expressly provided herein,
all of the terms and provisions of the Original Indenture are and shall remain
in full force and effect. The amendment provided for herein is limited to the
specific section of the Original Indenture specified herein and shall not
constitute an amendment of any other provisions of the Original Indenture.

         Section 4.5 GOVERNING LAW. This First Supplemental Indenture shall be
deemed to be a contract made under the laws of the State of New York and, for
all purposes, shall be construed in accordance with the laws of said State.

         Section 4.6 EXECUTION AND COUNTERPARTS. This First Supplemental
Indenture may be executed in any number of counterparts, each of which shall be
an original, but such counterparts shall together constitute but one and the
same instrument.

                                       3
<PAGE>

         IN WITNESS WHEREOF, Metromedia Fiber Network, Inc. has caused this
First Supplemental Indenture to be signed and acknowledged by its Chairman of
the Board, President or one of its Vice Chairman, has caused its corporate seal
to be affixed hereunto, and the same to be attested by its Secretary or one of
its Assistant Secretaries, and The Bank of New York, as Trustee, has caused this
First Supplemental Indenture to be signed and acknowledged by one of its Vice
Presidents, has caused its corporate seal to be affixed hereunto, and the same
to be attested by a duly authorized officer, all as of the day and year first
written above.

(Seal)                             Metromedia Fiber Network, Inc.

                                   By   /s/ Nick Tanzi
                                        ---------------------------------------
                                        Name:  Nick Tanzi
                                        Title: President

Attest:  By  /s/ Robert Sokota
             ---------------------------
             Name:  Robert Sokota
             Title: Secretary

(Seal)                             The Bank of New York

                                   By   /s/ Michael C. Daly
                                        ---------------------------------------
                                        Name:  Michael C. Daly
                                        Title: Assistant Vice President

Attest:  By  /s/ Geovanni Barris
             ---------------------------
             Name:  Geovanni Barris
             Title: Vice President

                                       4Prepared by MERRILL CORPORATION

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EXHIBIT 4.2    
  

EXECUTION COPY  

STANDSTILL AGREEMENT  

 entered into as of  

 January 23, 2001  

 between  

 

 LIBERATE TECHNOLOGIES,  

 DELPHI ASSET MANAGEMENT CORPORATION,  

 

 US TRUST COMPANY OF DELAWARE,

AS CO-TRUSTEE,  

 AND  

 UNITED STATES TRUST COMPANY OF NEW YORK,

AS CO-TRUSTEE  

 

 STANDSTILL AGREEMENT  

    AGREEMENT entered into as of January 23, 2001 between LIBERATE TECHNOLOGIES, a Delaware corporation (the
"Company"), DELPHI ASSET MANAGEMENT CORPORATION, a Nevada corporation ("Shareholder"), US TRUST COMPANY
OF DELAWARE, as co-trustee and UNITED STATES TRUST COMPANY OF NEW YORK, as co-trustee, (together, the "Trustee") of the Trust, a
voting trust formed pursuant to the Trust Agreement (as defined below) under the laws of the State of Delaware (the "Trust"). 

ARTICLE 1  

 DEFINITIONS  

    SECTION
1.01.  Definitions.  

    (a) The
following terms, as used herein, have the following meanings: 

    "Affiliate" means, with respect to any Person, any Person that directly or indirectly through one or more intermediaries, Controls, is
Controlled by, or is under common Control with an enterprise. 

    "Common Shares" means the common stock, $.01 par value per share, of the Company. 

    "Control" means the possession, direct or indirect, of the power to direct or cause the direction of the Management and policies of an
enterprise through ownership, by contract, or otherwise. 

    "Exchange Act" means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder. 

    "Management" means the Persons who are responsible for achieving the objectives of the enterprise and who have the authority to
establish policies and make decisions by which those objectives are to be pursued. 

    "Person" means an individual, a corporation, a partnership, an association, a trust or other entity or organization, including a
government or political subdivision or an agency or instrumentality thereof. 

    "Restricted Securities" means any (1) Common Shares and any other securities or rights convertible into or exchangeable or
exercisable for such Common Shares and (2) any other voting securities of the Company or securities or rights convertible into exchangeable or exercisable for voting securities of the Company. 

    "Securities Act" means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder. 

    "Shareholder Group" means Shareholder, the Trust and their respective Affiliates. 

    "Total Voting Power" means the aggregate number of votes which may be cast by holders of outstanding Common Shares. 

    "Trust Agreement" means the Irrevocable Trust Agreement by and among Delphi Asset Management Corporation, US Trust Company of Delaware
and United States Trust Company of New York entered into as of January 23, 2001. 

ARTICLE 2  

 COVENANTS OF SHAREHOLDER AND THE TRUST  

    SECTION
2.01.  Acquisition of Restricted Securities.  During the term of this Agreement, Shareholder
agrees that Shareholder will not, and will not permit its Affiliates to, purchase or otherwise acquire, or agree or offer to purchase or otherwise acquire, ownership of any Restricted Securities. 

2

 

    SECTION 2.02.  Sale or Transfer of Restricted Securities.  During the term of this Agreement, each of the
Shareholder and the Trustee agrees that it will not, and will not permit its Affiliates to, sell, pledge, encumber or otherwise transfer, or agree to sell, pledge, encumber or otherwise transfer,
directly or indirectly, any Restricted Securities, except: 

    (a) to
any Person, who, after giving effect to such sale, pledge, encumbrance or transfer, would beneficially own Common Shares representing in the aggregate 10% or
less of Total Voting Power; 

    (b) pursuant
to a firm commitment, underwritten distribution to the public, registered under the Securities Act, in which the Shareholder Group uses its reasonable best
efforts to effect as wide a distribution of such Restricted Securities as is reasonably practicable; 

    (c) pursuant
to Rule 144 under the Securities Act; provided that any such sale shall be subject to the volume and
manner of sale limitations set forth in such rule, whether or not legally required; 

    (d) pursuant
to a tender or exchange offer made by the Company or not opposed by the Company's board of directors to the Company's stockholders or otherwise pursuant to
an acquisition of control of the Company; 

    (e) as
a bona fide pledge to a financial institution; or 

    (f)  with
the prior written consent of the Company. 

    SECTION
2.03.  Certain Actions.  During the term of this Agreement, each of Shareholder and the Trustee
agrees that it will not: 

    (a) "solicit",
or become a "participant" in any "solicitation" of, any "proxy" (as such terms are defined in Regulation 14A under the Exchange Act) from any
holder of Common Shares in connection with any vote on any matter, or agree or announce its intention to vote with any Person undertaking a "solicitation" other than pursuant to the terms of the Trust
Agreement; 

    (b) form,
join or in any way participate in a "group" (within the meaning of Section 13(d)(3) of the Exchange Act) with respect to any Common Shares; 

    (c) initiate,
propose or otherwise solicit stockholders for the approval of one or more stockholder proposals with respect to the Company as described in
Rule 14a-8 under the 1934 Act, or induce or attempt to induce any other person to initiate any stockholder proposal; 

    (d) seek
election to or seek to place a representative on the Board of Directors of the Company or, except with the approval of management of the Company, seek the
removal of any member of the Board of Directors of the Company; 

    (e) except
with the approval of management of the Company, call or seek to have called any meeting of the stockholders of the Company; or 

    (f)  otherwise
act to seek to control, disrupt or influence the management, business, operations, policies or affairs of the Company. 

    SECTION
2.04.  Voting by the Trust.  During the term of this Agreement, the Trustee agrees that it shall
vote or cause to be voted all Common Shares owned by the Trust solely pursuant to the terms of the Trust Agreement. 

3

 
ARTICLE 3  

 TERMINATION  

    SECTION
3.01.  Termination.  This Agreement shall terminate upon the occurrence of any of the following: 

    (a) the
two-year anniversary of the termination of the Trust Agreement; 

    (b) the
dissolution, liquidation or winding up of the Company; or 

    (c) any
(i) merger or consolidation of the Company with or into any other corporation or corporations where the stockholders of the Company immediately prior to
such transaction do not hold at least 50% of the outstanding voting equity securities of the surviving corporation after such merger or consolidation or (ii) sale of all or substantially all of
the assets of the Company, except to any wholly-owned subsidiary of the Company. 

ARTICLE 4  

 MISCELLANEOUS  

    SECTION
4.01.  Notices.  All notices, requests and other communications to either party hereunder shall
be in writing (including telecopy or similar writing) and shall be given, 

    if
to the Company, to: 

Liberate
Technologies

2 Circle Star Way

San Carlos, CA 94070

Fax: (650) 701-5258 

    if
to Shareholder, to: 

Delphi
Asset Management Corporation

6005 Plumas Street

Suite 202

Reno, NV 89509

Fax: (775) 689-3412 

    if
to Trustee, to: 

US
Trust Company of Delaware

1300 Market Street

Suite 605

Wilmington, Delaware 19801

Fax: (302) 428-9615 

    and 

United
States Trust Company of New York

114 West 47th Street

New York, New York 10036

Fax: (212) 852-1626 

or
such other address or telecopier number as such party may hereafter specify for the purpose by notice to the other party hereto. Each such notice, request or other communication sdhall be effective
when delivered at the address specified in this section 4.01. 

    SECTION
4.02.  Amendments; No Waivers.  

4

 

    (a) Any
provision of this Agreement may be amended or waived if, and only if, such amendment or waiver is in writing and signed, in the case of an amendment, by
Shareholder, the Company and the Trustee, or in the case of a waiver, by the party against whom the waiver is to be effective. 

    (b) No
failure or delay by any party in exercising any right, power or privilege hereunder shall operate as a waiver thereof nor shall any single or partial exercise
thereof preclude any other or further exercise thereof or the exercise of any other right, power or privilege. The rights and remedies herein provided shall be cumulative and not exclusive of any
rights or remedies provided by law. 

    SECTION
4.03.  Counterparts; Effectiveness.  This Agreement may be signed in any number of counterparts,
each of which shall be an original, with the same effect as if the signatures thereto and hereto were upon the same instrument. This Agreement shall become effective as of the date first above
written. 

    SECTION
4.04.  Governing Law.  This agreement shall be construed in accordance with and governed by the
laws of the State of Delaware, without regard to the conflicts of law rules of such state. 

5

 
    IN WITNESS WHEREOF, the parties hereto have caused this Agreement to be duly executed by their respective authorized officers as of the day and year first above written. 

	 	 	LIBERATE TECHNOLOGIES
	

 	
 	

By:	
 	

/s/ MITCHELL E. KERTZMAN   

	 	 	 	 	Name:	 	Mitchell E. Kertzman
	 	 	 	 	Title:	 	CEO
	

 	
 	

DELPHI ASSET MANAGEMENT CORPORATION
	

 	
 	

By:	
 	

/s/ BARBARA R. WALLACE   

	 	 	 	 	Name:	 	Barbara R. Wallace
	 	 	 	 	Title:	 	President, CEO
	

 	
 	

US TRUST COMPANY OF DELAWARE, not in its individual capacity, but solely as Trustee of the Trust
	

 	
 	

By:	
 	

/s/ DEBRA W. PATTERSON   

	 	 	 	 	Name:	 	Debra W. Patterson
	 	 	 	 	Title:	 	Assistant Vice President
	

 	
 	

UNITED STATES TRUST COMPANY OF NEW YORK, not in its individual capacity, but solely as Trustee of the Trust
	

 	
 	

By:	
 	

/s/ JAMES E. LOGAN   

	 	 	 	 	Name:	 	James E. Logan
	 	 	 	 	Title:	 	Vice President

6

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EXHIBIT 4.2

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