Document:

CONFIDENTIAL TREATMENT

                                  AMENDMENT OF
                          PURCHASE AND SUPPLY AGREEMENT

         This Agreement, dated as of October 19, 2001 (referred to below as this
"Amendment"),   is   entered   into  by  and   between   Spectrian   Corporation
("Spectrian"),  a Delaware corporation,  and UltraRF, Inc. ("UltraRF"),  a North
Carolina corporation, as an amendment of the Purchase and Supply Agreement dated
as of December  29, 2000 (the  "Supply  Agreement")  previously  entered into by
Spectrian and UltraRF (then known as Zoltar Acquisition,  Inc.). All capitalized
terms used in this  Amendment  without  definition  shall have the  meanings set
forth in the Supply Agreement.

                                    Recitals

         WHEREAS,  Spectrian and UltraRF desire to amend the Supply Agreement to
adjust the Minimum  Commitment for certain  calendar  quarters and to agree upon
certain other matters relating to the Supply Agreement, all as set forth below;

         NOW,  THEREFORE,  in  consideration  of the  foregoing  and the  mutual
provisions  hereof,  and  intending to be legally  bound,  Spectrian and UltraRF
agree as follows:

         1. Section 1.2 of the Supply  Agreement  is hereby  amended by revising
the table of Minimum Commitments contained therein to read as follows:

       "Calendar Quarter Ending                  Minimum Commitment
       ------------------------                  ------------------

          March 31, 2001                              $6,800,000
          June 30, 2001                               $7,500,000
          September 30, 2001                          $8,300,000
          December 31, 2001                           $7,500,000
          March 31, 2002                              [***]
          June 30, 2002                               [***]
          September 30, 2002                          [***]
          December 31, 2002                           [***]"

         2.  Notwithstanding  anything herein or in the Supply  Agreement to the
contrary, including, without limitation, the provisions of Sections 1.2, 2.2 and
3.1 of the  Supply  Agreement,  during  each  of the  calendar  quarters  ending
December 31, 2001 (referred to below as "Q4 2001"),  March 31, 2002 (referred to
below as "Q1 2002") and June 30, 2002  (referred to below as "Q2 2002")  UltraRF
will  not and is not  obligated  to  ship  Components  to  Spectrian  having  an
aggregate  purchase price that exceeds the respective  Minimum Commitment amount
referred to above in Section 1.2 of this Amendment for such calendar quarters.

         3.  Notwithstanding  anything herein or in the Supply  Agreement to the
contrary, including, without limitation, the provisions of Sections 1.2, 2.2 and
3.1 of the  Supply  Agreement,  approximately  $[***] of Firm  Orders  which had
Original Delivery Dates in Q4 2001

[***]  Confidential  treatment  requested pursuant to a request for confidential
treatment filed  with the Securities and Exchange Commission.  Omitted  portions
have been filed separately with the Commission.

<PAGE>
                                                          CONFIDENTIAL TREATMENT

shall be deemed  amended  hereby  such that  these  Firm  Orders  shall now have
Original  Delivery Dates in Q1 2002 and shall be deemed Spectrian  Purchases for
Q1 2002.

         4.  Notwithstanding  anything herein or in the Supply  Agreement to the
contrary, including, without limitation, the provisions of Sections 1.2, 2.2 and
3.1 of the Supply  Agreement,  the  approximately  $[***] of Components sold and
shipped by UltraRF to Spectrian on September 29, 2001, and received by Spectrian
on October 2, 2002, shall be deemed Spectrian Purchases for Q4 2001.

         5.  Concurrent  with the  execution of this  Amendment,  Spectrian  has
delivered to UltraRF and UltraRF has accepted  Firm Orders for  Components to be
delivered  during Q1 2002 having an aggregate  purchase  price of  approximately
$[***] (inclusive of the approximately $[***] of Components referred to above in
Section 3 of this Amendment) (referred to below as the "Q1 Orders") and that the
Q1  Orders  have been  made in  accordance  with the  provisions  of the  Supply
Agreement,  including,  without limitation,  Sections 2.2 and 2.4. The Q1 Orders
include  Components in the form of finished  goods having an aggregate  purchase
price of approximately $[***] that are to incorporate devices based on UltraRF's
LDMOS 8 technology and conform to the applicable Competitive  Specifications (as
defined below) (referred to below as the "New Device Finished  Goods").  The New
Device  Finished  Goods  included in the Q1 Order  include  approximately  [***]
units.  Spectrian and UltraRF hereby  acknowledge and agree that UltraRF has not
yet  qualified  the  New  Device  Finished  Goods  for   production,   that  the
qualification of such Components may not occur in time to permit delivery during
Q1 2001, and that such  Components may never be qualified or delivered.  UltraRF
will use all commercially reasonable efforts to qualify, produce and deliver New
Device  Finished  Goods to Spectrian  and to do so during Q1 2002 in  accordance
with the Q1 Orders, but shall have no liability, except as expressly provided in
paragraph  7 of this  Amendment,  due to any delay in  delivery  or  failure  to
deliver such Components.

         6. In the event  UltraRF is unable to deliver  the New Device  Finished
Goods during Q1 2001 in  accordance  with the Q1 Orders,  then  Spectrian  shall
purchase and accept delivery from UltraRF, and UltraRF shall sell and deliver to
Spectrian,  die for use in manufacturing the New Device Finished Goods (referred
to below as the  "Spectrian  Die Bank") on [***],  having an aggregate  purchase
price of $[***] minus the aggregate  purchase price of New Device Finished Goods
delivered by UltraRF to Spectrian during Q1 2002 (such difference being referred
to below as the  "Aggregate  Die  Purchase  Price").  In the event that  UltraRF
delivers the Spectrian Die Bank to Spectrian,  then UltraRF  agrees that it will
not deliver any further New Device  Finished Goods to Spectrian from [***] until
[***].  The Spectrian Die Bank shall include the  equivalent  number of units in
die form necessary to deliver units of New Device Finished Goods to Spectrian in
Q2 2002, representing the difference between (1) [***] times the number of units
of New Device Finished Goods specified in the Q1 Order,  and (2) [***] times the
number of units of New Device  Finished Goods  delivered to Spectrian in Q1 2002
on or before March 22, 2002. The price per unit for the Spectrian Die Bank shall
be [***] of the unit  price on the Q1 Order for the New Device  Finished  Goods.
The parties hereby  acknowledge  and agree that the Aggregate Die Purchase Price
shall  count  towards  the Q1 2002  Minimum  Commitment.  UltraRF

[***]  Confidential  treatment  requested pursuant to a request for confidential
treatment filed  with the Securities and Exchange Commission.  Omitted  portions
have been filed separately with the Commission.

                                      -2-
<PAGE>
                                                          CONFIDENTIAL TREATMENT

will hold the Spectrian Die Bank for use in  manufacturing  New Device  Finished
Goods for  Spectrian,  but title  and risk of  damage or loss will  remain  with
Spectrian.  UltraRF will use all commercially reasonable efforts to complete the
manufacture  of all the  Spectrian  Die Bank into units of New  Device  Finished
Goods (referred to below as "Completed Die Into Finished Goods") within a 90 day
period ending [***] (referred to below as "Completion  Period"),  but shall have
no liability due to any delay in delivery or failure to deliver such  Components
except as expressly  provided in paragraph 7 of this Amendment.  Spectrian shall
purchase and accept  delivery of the Completed  Die Into  Finished  Goods for an
additional  price per unit  equal to [***] of the unit  price for the New Device
Finished  Goods (that is, an  aggregate  purchase  price of up to $[***] for the
Completed Die Into Finished Goods which together with the Aggregate Die Purchase
Price represents an aggregate  purchase price of up to $[***] for all New Device
Finished Goods made from the Spectrian Die Bank). Spectrian shall have the right
to designate different packaging types for packaging the Spectrian Die Bank than
the packaging  types  previously  designated on its purchase  orders for the New
Device  Finished  Goods,  provided that UltraRF  receives  written notice of the
change not later than November 30, 2001 for the Q1 Order of New Device  Finished
Goods and not later than  January 31, 2002 for the mix of products of  Completed
Die Into Finished  Goods from the  Spectrian Die Bank and provided  further that
new packaging type designated by Spectrian is a standard package type offered by
UltraRF.  The parties acknowledge and agree that the aggregate purchase price of
Completed Die Into Finished Goods (not  including the Die Purchase  Price) shall
count as Spectrian Purchases towards the Q2 2002 Minimum Commitment.

         7. In the event UltraRF is unable to deliver some portion or all of the
Completed Die Into Finished  Goods to Spectrian  during the  Completion  Period,
then upon the expiration of the Completion Period all units of the Spectrian Die
Bank not  incorporated  into  Completed  Die Into  Finished  Goods  delivered to
Spectrian  will  become the  property of UltraRF and  Spectrian  will  receive a
credit  (referred to below as the "Spectrian  Credit") from UltraRF equal to the
difference  of (i) [***] of the Die  Purchase  Price and (ii) the product of (A)
[***] of the Die  Purchase  Price  and (B) a  fraction  whose  numerator  is the
purchase price of the Completed Die Into Finished  Goods which are  manufactured
in the Completion  Period and whose  denominator is the Die Purchase Price.  The
Spectrian  Credit  shall be  applied,  at  Spectrian's  election,  to reduce the
Minimum  Commitment  in any calendar  quarter  starting  with Q3 2002  (provided
UltraRF receives written notice of Spectrian's  election to do so not later than
the first day of the quarter for which the Minimum Commitment is being reduced);
as a credit towards  future  purchases of Components by Spectrian or as a credit
against any payment due for  Components  received by Spectrian but not yet paid.
In the event that Spectrian is unable to use the balance of the Spectrian Credit
as provided above,  it shall so notify UltraRF,  and UltraRF shall then promptly
deliver to Spectrian a cash payment equal to the Spectrian Credit.

         8.  Spectrian  shall be  considered to have  provided  UltraRF  written
notice effective on [***],  pursuant to Section 1.4(b) of the Supply  Agreement,
of Spectrian's  determination to "lock in" Components  corresponding to Motorola
Part  Nos.  [***]  and  [***].   Such  Locked  In  Components  shall  be  deemed
"Competitive" with such Motorola parts, within the meaning of Section 1.4 of the
Supply Agreement, if such Locked In Components meet or exceed Motorola's

[***]  Confidential  treatment  requested pursuant to a request for confidential
treatment filed  with the Securities and Exchange Commission.  Omitted  portions
have been filed separately with the Commission.

                                       -3-
<PAGE>
                                                          CONFIDENTIAL TREATMENT

published  specifications  applicable to the  corresponding  Motorola part as in
effect [***] ("Competitive  Specifications").  As such, if UltraRF does not have
Locked In Components  identified above available on or after [***] which meet or
exceed the applicable  Competitive  Specifications,  and if Spectrian thereafter
purchases  such  products from other  vendors,  then such  purchases  from other
vendors in a calendar  quarter shall be deemed to be a  Performance  and Product
Availability Adjustment,  as defined in Section 1.4 (b) of the Supply Agreement,
for purposes of the Minimum Commitment for such quarter.

         9. Spectrian  shall be considered to have given UltraRF  written notice
effective  on [***],  pursuant  to Section  1.4(b) of the Supply  Agreement,  of
Spectrian's determination to "lock in" Components corresponding to Motorola Part
Nos. [***] and [***].  Such Locked In Components  shall be deemed  "Competitive"
with such  Motorola  parts,  within the  meaning  of  Section  1.4 of the Supply
Agreement,  if the  Locked In  Components  meet or exceed  Motorola's  published
specifications  applicable to the corresponding Motorola part as in effect [***]
("Competitive  Specifications")  . As such,  if UltraRF  does not have Locked In
Components identified above available on or after [***] which meet or exceed the
applicable  Competitive  Specifications,  and if Spectrian  thereafter purchases
such products from other  vendors,  then such  purchases from other vendors in a
calendar  quarter shall be deemed to be a Performance  and Product  Availability
Adjustment,  as defined in Section 1.4 (b) of the Supply Agreement, for purposes
of the Minimum Commitment for such quarter.

         10. Except as set forth above,  the Supply  Agreement shall continue in
effect in accordance with its original terms.

         11. This Amendment may be executed in one or more counterparts, each of
which shall be deemed an original,  but all of which together  shall  constitute
one and the same  instrument.  This Amendment shall be governed by and construed
and  enforced in  accordance  with the laws of the same state as apply under the
terms of the Supply Agreement.

                  [Remainder of Page Intentionally Left Blank]

[***]  Confidential  treatment  requested pursuant to a request for confidential
treatment filed  with the Securities and Exchange Commission.  Omitted  portions
have been filed separately with the Commission.

                                       -4-
<PAGE>

                                                          CONFIDENTIAL TREATMENT

         IN WITNESS WHEREOF, Spectrian and UltraRF have caused this Amendment to
be executed in one or more  counterparts  by their  respective  duly  authorized
representatives.

UltraRF, Inc.                            Spectrian Corporation

By:      /s/ Chris Tubis                 By:    /s/ Michael Angel
     ----------------------------           ----------------------------
        Name:  Chris Tubis                    Name:  Michael Angel
        Its:                                  Its: Executive VP and CFO

Date:    November 12, 2001               Date:    November 12, 2001
     ----------------------------             ----------------------------

[***]  Confidential  treatment  requested pursuant to a request for confidential
treatment filed  with the Securities and Exchange Commission.  Omitted  portions
have been filed separately with the Commission.Exhibit 10.13

                         REGISTRATION RIGHTS AGREEMENT

     AGREEMENT dated as of February 7, 2002 among Commonwealth Telephone
Enterprises, Inc., a Pennsylvania corporation (the "Company"), and Level 3
Communications, Inc., a Delaware corporation ("Level 3").

     WHEREAS, Level 3 is the indirect beneficial owner of 9,639,326 issued and
outstanding shares of the Company's Common Stock, par value $1.00 per share
(the "Common Stock"), and 1,017,061 issued and outstanding shares of the
Company's Class B Common Stock, par value $1.00 per share (the "Class B Common
Stock," and together with the Common Stock, the "Capital Stock"), which are
held of record by Level 3 Delaware Holdings, Inc., a Delaware corporation
("Delaware Holdings").

     WHEREAS, this Agreement is being entered into to memorialize the agreement
between the parties with respect to a Shareholder's right to have its shares of
Capital Stock registered pursuant to the Securities Act of 1933, as amended.

     WHEREAS, it is intended by the Company and Level 3 that this Agreement
shall become effective immediately.

     NOW, THEREFORE, the parties hereto agree as follows:

                                   ARTICLE 1

                                  DEFINITIONS

     SECTION 1.1. Definitions. The following terms, as used herein, have the
following meanings:

     "Commission" means the Securities and Exchange Commission.

     "Company Expenses" means: (i) registration and filing fees with the
Commission and National Association of Securities Dealers, Inc., (ii) fees and
expenses of compliance with securities or blue sky laws (including reasonable
fees and disbursements of counsel in connection with blue sky qualifications of
the Registrable Securities), (iii) printing expenses, (iv) fees and expenses
incurred in connection with the listing or quotation of the Registrable
Securities, (v) fees and expenses of counsel to the Company and the fees and
expenses of independent certified public accountants for the Company (including
fees and expenses associated with any special audits or the delivery of comfort
letters), (vi) the reasonable fees and expenses of any additional experts
retained by the Company in connection with such registration and (vii) the
reasonable fees and expenses of one counsel for all the Participating
Shareholders not in excess of $25,000.

     "Demand Registration" means a Demand Registration as defined in Section
2.1.

<PAGE>

     "Participating Shareholders" means the Shareholders electing to sell
Registrable Securities pursuant to a Demand Registration or a Piggyback
Registration.

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

     "Piggyback Registration" means a Piggyback Registration as defined in
Section 2.2.

     "Registrable Securities" means (i) all shares of Capital Stock held by
Level 3 on the date hereof, (ii) any shares of Capital Stock acquired after the
date hereof and (iii) any shares of Capital Stock or other securities
distributed as a dividend with respect to, or issued in exchange for or in
replacement of, such shares of Capital Stock.

     "Shareholder" means a holder of Registrable Securities.

     "Shareholder Expense Cap" means $500,000.

     "Subsidiary" means each corporation, partnership, joint venture or other
legal entity of which a Shareholder beneficially owns, directly or indirectly,
more than 50% of the outstanding stock or other equity interests.

     "Underwriter" means a securities dealer who purchases any Registrable
Securities as principal and not as part of such dealer's market-making
activities.

                                   ARTICLE 2

                              REGISTRATION RIGHTS

     SECTION 2.1. Demand Registration. (a) Shareholders holding Registrable
Securities may make an aggregate of up to three (3) written requests for
registration under the Securities Act (including the first request contained in
subsection 2.1(d) hereof) of all or any part of the Registrable Securities held
by such Shareholders (a "Demand Registration"); provided that (i) the first
Demand Registration must be in respect of not less than 2,500,000 Registrable
Securities (as adjusted for any stock dividends, combinations, splits,
recapitalizations and the like), (ii) the second and third Demand Registrations
must each be in respect of not less than either (x) 1,500,000 Registrable
Securities (as adjusted for any stock dividends, combinations, splits,
recapitalizations and the like) or (y) Registrable Securities representing the
right to cast at least 6,500,000 votes at a meeting of stockholders of the
Company (exclusive of cumulative voting rights) ("Votes"), (iii) the
Shareholders shall not request a Demand Registration within 150 days of the
effective date of a prior Demand Registration and (iv) the Shareholders shall
indicate the Registrable Securities to be registered (that is, Common Stock,
Class B Common Stock or a combination of both). In addition, such request will
specify the aggregate number of shares of Registrable Securities proposed to be
sold by the Shareholders and will also specify the intended method of
disposition thereof. A registration will not count as a Demand Registration
until the distribution contemplated by such Demand Registration has been
consummated. Should the

                                                                    Page 2 of 14
<PAGE>

distribution contemplated by a Demand Registration not be consummated due to
the failure of the Participating Shareholders to perform their obligations
under this Agreement or the inability of the Participating Shareholders to
reach agreement with the Underwriters for the proposed sale on price or other
customary terms for such transaction, or in the event the Participating
Shareholders withdraw or do not pursue the request for the Demand Registration
(in each of the foregoing cases, provided that at such time the Company is in
compliance in all material respects with its obligations under this Agreement),
then such Demand Registration shall not be deemed to have been effected, but
the Participating Shareholders shall pay those expenses incurred by the Company
in connection with such request set forth in Section 3.2 hereof.

     (b) If the Shareholders so elect, the offering of such Registrable
Securities pursuant to such Demand Registration shall be in the form of an
underwritten offering. The Participating Shareholders shall have the right
jointly to select the managing Underwriters and any additional investment
bankers and managers to be used in connection with such offering, subject to
the Company's approval, which approval shall not be unreasonably withheld,
conditioned or delayed.

     (c) The Company will have the right to preempt any Demand Registration
with a primary registration by delivering written notice (within five business
days after the Company has received from the Participating Shareholders a
request for such Demand Registration) of such intention to the Participating
Shareholders indicating that the Company has identified a specific business
need and use for the proceeds of the sale of such securities and the Company
shall use all commercially reasonable efforts to effect a primary registration
within 90 days of such notice. In the ensuing primary registration, the
Shareholders will have such piggyback registration rights as are set forth in
Section 2.2 hereof. Upon the Company's preemption of a requested Demand
Registration, such requested registration will not count as a Demand
Registration. The Company shall not be entitled to exercise this right of
preemption more than one (1) time in any 180 day period.

     (d) Level 3 hereby requests the registration of a minimum of 2,500,000
Registrable Securities pursuant to subsection 2.1(a) above, and agrees to use
commercially reasonable efforts to cause such Registrable Securities to be sold
in an underwritten offering on or before May 30, 2002, subject to the
provisions of Section 2.1(a). The Company and Level 3 agree that the co-lead
underwriters of the offering will be Morgan Stanley Dean Witter and Goldman,
Sachs & Co. Level 3 acknowledges that it will not have the right to sell less
than 2,500,000 Registrable Securities in the offering without the prior written
consent of the Company.

     SECTION 2.2. Piggyback Registration. If the Company proposes to file a
registration statement under the Securities Act with respect to an offering (a
"Proposed Offering") of common equity securities for the Company's own account
or for the account of other shareholders of the Company (other than a
registration statement on Form S-4 or S-8 or pursuant to Rule 415 (or any
substitute form or rule, respectively, that may be adopted by the Commission)),
the Company shall give written notice of such proposed filing to each
Shareholder as soon as reasonably practicable (but in no event less than ten
business days before the anticipated filing date), and such notice shall offer
each Shareholder the opportunity to

                                                                    Page 3 of 14
<PAGE>

register such number of shares of Registrable Securities held by such
Shareholder as such Shareholder may request on the same terms and conditions as
the Company's Common Stock (a "Piggyback Registration"). Each Shareholder will
have five business days after receipt of any such notice to notify the Company
as to whether it wishes to participate in a Piggyback Registration and, if so,
the number of Registrable Securities proposed to be included in such offering;
provided that should any Shareholder fail to provide timely notice to the
Company, such Shareholder will forfeit any rights to participate in the
Piggyback Registration with respect to such proposed offering. If the Company
shall determine in its sole discretion not to register or to delay the Proposed
Offering, the Company may, at its election, provide written notice of such
determination to the Shareholders who have provided timely notice of their
intention to participate in the Piggyback Registration and (i) in the case of a
determination not to effect the Proposed Offering, shall thereupon be relieved
of the obligation to register such Shareholder's Registrable Securities in
connection therewith, and (ii) in the case of a determination to delay a
Proposed Offering, shall thereupon be permitted to delay registering such
Shareholder's Registrable Securities for the same period as the delay in
respect of Common Stock being registered for the Company's account; provided
that such delay will not prevent the Shareholder from exercising their right to
request a Demand Registration subject to the provisions of Section 2.1. The
Company shall be entitled to select the Underwriters in connection with any
Piggyback Registration.

     SECTION 2.3. Reduction of Offering. Notwithstanding anything contained
herein, if the managing Underwriter of an offering described in Section 2.1 or
Section 2.2 advises the Company and the Participating Shareholders that
marketing factors require a limitation of the number of shares to be
underwritten, then the amount of Registrable Securities to be offered for the
account of the Shareholders and other selling persons exercising similar
piggy-back registration rights shall be reduced pro rata to the extent
necessary to reduce the total amount of securities to be included in such
offering to the amount recommended by such managing Underwriter and, as between
the Shareholders and other selling persons exercising similar piggy-back
registration rights, the number will be reduced pro rata based on the number of
Registrable Securities each Shareholder requests to have registered; provided
that in the case of a Demand Registration, the amount of Registrable Securities
to be offered for the account of the Shareholders making the Demand shall be
reduced pro rata as to those Shareholders making a Demand Registration only
after the amount of securities to be offered for the account of the Company and
any other Persons (other than any Persons having registration rights as of the
date of this Agreement) has been reduced to zero.

                                   ARTICLE 3

                            REGISTRATION PROCEDURES

     SECTION 3.1. Filings; Information. Whenever the Shareholders request that
any Registrable Securities be registered pursuant to Section 2.1 hereof, the
Company will use all commercially reasonable efforts to effect the registration
of such Registrable Securities as promptly as is reasonably practicable, and in
connection with any such request:

                                                                    Page 4 of 14
<PAGE>

          (a) The Company will expeditiously prepare and file with the
     Commission a registration statement on any form for which the Company then
     qualifies and which counsel for the Company shall deem appropriate and
     available for the sale of the Registrable Securities to be registered
     thereunder in accordance with the intended method of distribution thereof,
     and use all commercially reasonable efforts to cause such filed
     registration statement to become and remain effective for such period, not
     to exceed 90 days, as may be reasonably necessary to effect the sale of
     such securities; provided that if the Company shall furnish to the
     Participating Shareholders a certificate signed by the Company's Chairman
     or President stating that in the good faith judgment of the Company's
     Board of Directors it would be seriously detrimental to the Company or its
     shareholders for such a registration statement to be filed or become
     effective as expeditiously as possible, the Company may postpone the
     filing or effectiveness of a registration statement for a period of not
     more than 120 days (provided that the Company may not defer such filing
     pursuant to this clause more than once in any 12 month period); and
     provided further that if (i) the effective date of any registration
     statement filed pursuant to a Demand Registration would otherwise be at
     least 45 calendar days, but fewer than 90 calendar days, after the end of
     the Company's fiscal year, and (ii) the Securities Act requires the
     Company to include audited financials as of the end of such fiscal year,
     the Company may delay the effectiveness of such registration statement for
     such period as is reasonably necessary to include therein its audited
     financial statements for such fiscal year, although the Company will use
     all commercially reasonable efforts to minimize the length of such delay.

          (b) The Company will, if requested, prior to filing such registration
     statement or any amendment or supplement thereto, furnish to the
     Participating Shareholders and each applicable managing Underwriter, if
     any, copies thereof, and thereafter furnish to the Participating
     Shareholders and each such Underwriter, if any, such number of copies of
     such registration statement, amendment and supplement thereto (in each
     case including all exhibits thereto and documents incorporated by
     reference therein) and the prospectus included in such registration
     statement (including each preliminary prospectus) as the Participating
     Shareholders or each such Underwriter may reasonably request in order to
     facilitate the sale of the Registrable Securities.

          (c) After the filing of the registration statement, the Company will
     promptly notify the Participating Shareholders of any stop order issued
     or, to the Company's knowledge, threatened to be issued by the Commission
     and take all commercially reasonable actions required to prevent the entry
     of such stop order or to remove it if entered.

          (d) The Company will use all commercially reasonable efforts to
     qualify the Registrable Securities for offer and sale under such other
     securities or blue sky laws of such jurisdictions in the United States as
     the Participating Shareholders reasonably request; provided that the
     Company will not be required to (i) qualify generally to do business in
     any jurisdiction where it would not otherwise be required to qualify but
     for

                                                                    Page 5 of 14
<PAGE>

     this paragraph 3.1(d), (ii) subject itself to taxation in any such
     jurisdiction or (iii) consent to general service of process in any such
     jurisdiction.

          (e) The Company will as promptly as is practicable notify the
     Participating Shareholders, at any time when a prospectus relating to the
     sale of the Registrable Securities is required by law to be delivered in
     connection with sales by an Underwriter or dealer, of the occurrence of
     any event requiring the preparation of a supplement or amendment to such
     prospectus so that, as thereafter delivered to the purchasers of such
     Registrable Securities, such prospectus will not contain an untrue
     statement of a material fact or omit to state any material fact required
     to be stated therein or necessary to make the statements therein, in the
     light of the circumstances under which they were made, not misleading and
     promptly make available to the Participating Shareholders and to the
     Underwriters any such supplement or amendment. Upon receipt of any notice
     from the Company of the occurrence of any event of the kind described in
     the preceding sentence, the Participating Shareholders will forthwith
     discontinue the offer and sale of Registrable Securities pursuant to the
     registration statement covering such Registrable Securities until receipt
     by the Participating Shareholders and the Underwriters of the copies of
     such supplemented or amended prospectus and, if so directed by the
     Company, the Participating Shareholders will deliver to the Company all
     copies, other than permanent file copies then in the Participating
     Shareholders' possession, of the most recent prospectus covering such
     Registrable Securities at the time of receipt of such notice. In the event
     the Company shall give such notice, the Company shall extend the period
     during which such registration statement shall be maintained effective as
     provided in Section 3.1(a) hereof by the number of days during the period
     from and including the date of the giving of such notice to the date when
     the Company shall make available to the Participating Shareholders such
     supplemented or amended prospectus.

          (f) The Company will enter into customary agreements (including an
     underwriting agreement in customary form) and take such other actions as
     are required in order to expedite or facilitate the sale of such
     Registrable Securities.

          (g) At the request of any Underwriter in connection with an
     underwritten offering, the Company will furnish (i) an opinion of counsel,
     addressed to the Underwriters, covering such customary matters as the
     managing Underwriter may reasonably request and (ii) a comfort letter or
     comfort letters from the Company's independent public accountants covering
     such customary matters as the managing Underwriter may reasonably request.

          (h) The Company will make generally available to its security
     holders, as soon as reasonably practicable, an earning statement covering
     a period of 12 months, beginning within three months after the effective
     date of the registration statement, which earning statement shall satisfy
     the provisions of Section 11(a) of the Securities Act and the rules and
     regulations of the Commission thereunder.

                                                                    Page 6 of 14
<PAGE>

          (i) The Company will use all commercially reasonable efforts to cause
     all such Registrable Securities to be listed on each securities exchange
     or quoted on each inter-dealer quotation system on which the Common Stock
     is then listed or quoted.

     The Company may require the Participating Shareholders promptly to furnish
in writing to the Company such information regarding the Participating
Shareholders, the plan of distribution of the Registrable Securities and other
information as the Company may from time to time reasonably request or as may
be legally required in connection with such registration.

     SECTION 3.2. Registration Expenses. Participating Shareholders shall bear
50% of the Company Expenses incurred in connection with any Demand Registration
(up to and including the Shareholder Expense Cap) and the Company shall bear
the balance of the Company Expenses. The Company shall bear all of the Company
Expenses incurred in connection with a Piggyback Registration. The
Participating Shareholders shall pay any underwriting fees, discounts or
commissions attributable to the sale of Registrable Securities and any
out-of-pocket expenses of the Participating Shareholders (other than the fees
and expenses of counsel described in clause (vii) of the definition of "Company
Expenses" set forth in Article 1 hereof). In the event that a distribution
contemplated by a Demand Registration is not consummated for any reason other
than the failure by the Company to perform its obligations under this
Agreement, all reasonable Company Expenses incurred in connection with such
registration shall be borne by the Participating Shareholders; provided that
should the distribution contemplated by the Demand Registration not be
consummated due to the Participating Shareholders withdrawing the Demand
Registration as a result of either (x) a material adverse change in the
condition (financial or otherwise), business, assets or results of operations
of the Company and its Subsidiaries taken as a whole or (y) a material adverse
change in the United States financial markets, in either case occurring
subsequent to the date of the written request made by the Participating
Shareholders hereunder, the Participating Shareholders and the Company shall
each bear 50% of the Company Expenses incurred in connection with such
withdrawn Demand Registration.

     (b) Notwithstanding any provision in this Agreement to the contrary, each
party to this Agreement shall bear its own expenses (including attorneys' fees
and expenses and the fees and expenses of any financial adviser) incurred by
that party in connection with the negotiation, review, preparation and
execution of this Agreement, and Level 3 shall have no responsibility for the
payment of any other expenses incurred by the Company related to the
transactions contemplated herein other than as set forth in Section 3.2(a)
hereof.

                                   ARTICLE 4

                        INDEMNIFICATION AND CONTRIBUTION

     SECTION 4.1. Indemnification by the Company. The Company agrees to
indemnify and hold harmless each Shareholder from and against any and all
losses, claims, damages and liabilities (including reasonable attorneys' fees)
caused by any untrue statement or alleged untrue statement of a material fact
contained in any registration statement or prospectus relating to the
Registrable Securities (as amended or supplemented if the Company shall have
furnished any amendments or supplements thereto) or any preliminary prospectus,
or caused by any omission or

                                                                    Page 7 of 14
<PAGE>

alleged omission to state therein a material fact required to be stated therein
or necessary to make the statements therein not misleading, except insofar as
such losses, claims, damages or liabilities are caused by or contained in or
based upon any information furnished in writing to the Company by a Shareholder
or any Underwriter expressly for use therein. The Company also agrees to
indemnify any Underwriters of the Registrable Securities, their officers and
directors, and each person who controls such Underwriters, on substantially the
same basis as that of the indemnification of Shareholders provided in this
Section 4.1.

     SECTION 4.2. Indemnification by Shareholders. Each Shareholder agrees to
indemnify and hold harmless the Company, its officers and directors, and each
Person, if any, who controls the Company within the meaning of either Section
15 of the Securities Act or Section 20 of the Exchange Act to the same extent
as the foregoing indemnity from the Company to the Shareholders, but only with
reference to information furnished in writing by or on behalf of such
Shareholders expressly for use in any registration statement or prospectus
relating to the Registrable Securities, or any amendment or supplement thereto,
or any preliminary prospectus or the failure to deliver a copy of such
registration statement or prospectus or any amendments or supplements thereto
due to the fault of such Shareholders. Each Shareholder also agrees to
indemnify and hold harmless any Underwriters of the Registrable Securities,
their officers and directors and each person who controls such Underwriters on
substantially the same basis as that of the indemnification of the Company
provided in this Section 4.2. The extent of each Shareholder's liability under
this Section 4.2 shall be limited to the amount such Shareholder receives in
the relevant offering of Registrable Securities.

     SECTION 4.3. Conduct of Indemnification Proceedings. In case any
proceeding (including any governmental investigation) shall be instituted
involving any Person in respect of which indemnity may be sought pursuant to
Section 4.1 or Section 4.2, such Person (the "Indemnified Party") shall
promptly notify the Person against whom such indemnity may be sought (the
"Indemnifying Party") in writing and the Indemnifying Party, upon the request
of the Indemnified Party, shall retain counsel reasonably satisfactory to such
Indemnified Party to represent such Indemnified Party and any others the
Indemnifying Party may designate in such proceeding and shall pay the fees and
disbursements of such counsel related to such proceeding. In any such
proceeding, any Indemnified Party shall have the right to retain its own
counsel, but the fees and expenses of such counsel shall be at the expense of
such Indemnified Party unless (i) the Indemnifying Party and the Indemnified
Party shall have mutually agreed to the retention of such counsel or (ii) the
named parties to any such proceeding (including any impleaded parties) include
both the Indemnified Party and the Indemnifying Party and representation of
both parties by the same counsel would be inappropriate due to actual or
potential differing interests between them. It is understood that the
Indemnifying Party shall not, in connection with any proceeding or related
proceedings in the same jurisdiction, be liable for the fees and expenses of
more than one separate firm of attorneys (in addition to any local counsel) at
any time for all such Indemnified Parties, and that all such fees and expenses
shall be reimbursed as they are incurred. In the case of any such separate firm
for the Indemnified Parties, such firm shall be designated in writing by the
Indemnified Parties. The Indemnifying Party shall not be liable for any
settlement of any proceeding effected without its written consent, which
consent will not be unreasonably withheld, but if settled with such consent, or
if there be a final judgment for the plaintiff, the

                                                                    Page 8 of 14
<PAGE>

Indemnifying Party shall indemnify and hold harmless such Indemnified Parties
from and against any loss or liability (to the extent stated above) by reason
of such settlement or judgment.

     SECTION 4.4. Contribution. If the indemnification provided for in this
Article 4 is unavailable to an Indemnified Party in respect of any losses,
claims, damages or liabilities in respect of which indemnity is to be provided
hereunder, then each such Indemnifying Party, in lieu of indemnifying such
Indemnified Party, shall to the fullest extent permitted by law contribute to
the amount paid or payable by such Indemnified Party as a result of such
losses, claims, damages or liabilities in such proportion as is appropriate to
reflect the relative fault of the Company and the Shareholders in connection
with the statements or omissions that resulted in such losses, claims, damages
or liabilities, as well as any other relevant equitable considerations. The
relative fault of the Company and the Shareholders shall be determined by
reference to, among other things, whether the untrue or alleged untrue
statement of a material fact or the omission or alleged omission to state a
material fact relates to information supplied by such party and the parties'
relative intent, knowledge, access to information and opportunity to correct or
prevent such statement or omission.

     The Company and the Shareholders agree that it would not be just and
equitable if contribution pursuant to this Section 4.4 were determined by pro
rata allocation (even if the Shareholders were treated as one entity for such
purpose) or by any other method of allocation that does not take account of the
equitable considerations referred to in the immediately preceding paragraph.
The amount paid or payable by an Indemnified Party as a result of the losses,
claims, damages or liabilities referred to in the immediately preceding
paragraph shall be deemed to include, subject to the limitations set forth
above, any legal or other expenses reasonably incurred by such Indemnified
Party in connection with investigating or defending any such action or claim.
Notwithstanding the provisions of this Article 4, no Shareholder shall be
required to contribute any amount in excess of the amount by which the net
proceeds of the offering (before deducting expenses) received by such
Shareholder exceeds the amount of any damages which such Shareholder has
otherwise been required to pay by reason of such untrue or alleged untrue
statement or omission or alleged omission. No person guilty of fraudulent
misrepresentation (within the meaning of Section 11(f) of the Securities Act)
shall be entitled to contribution from any Person who was not guilty of such
fraudulent misrepresentation.

                                   ARTICLE 5

                                 MISCELLANEOUS

     SECTION 5.1. Participation in Underwritten Registrations. No Person may
participate in any underwritten registered offering contemplated hereunder
unless such Person (a) agrees to sell its securities on the basis provided in
any underwriting arrangements approved by the Persons entitled hereunder to
approve such arrangements, (b) completes and executes all customary and normal
questionnaires, powers of attorney, custody arrangements, indemnities,
underwriting agreements and other documents reasonably required under the terms
of such underwriting arrangements and this Agreement and (c) furnishes in
writing to the Company such information regarding such Person, the plan of
distribution of the Registrable Securities and other information

                                                                   Page 9 of 14
<PAGE>

as the Company may from time to time request or as may be legally required in
connection with such registration.

     SECTION 5.2. Rule 144. The Company covenants that it will file any reports
required to be filed by it under the Securities Act and the Exchange Act and
that it will take such further action as the Shareholders may reasonably
request to the extent required from time to time to enable the Shareholders to
sell Registrable Securities without registration under the Securities Act
within the limitation of the exemptions provided by Rule 144 under the
Securities Act, as such Rule may be amended from time to time, or any similar
rule or regulation hereafter adopted by the Commission. Upon the request of the
Shareholders, the Company will deliver to the Shareholders a written statement
as to whether it has complied with such reporting requirements. A Shareholder
shall not be entitled to a Demand Registration or a Piggyback Registration if
the Company provides to the Shareholder an opinion of recognized counsel to the
effect that based on the proposed plan of distribution, registration of such
transaction under the Securities Act is not required.

     SECTION 5.3. Holdback Agreements. Each Shareholder agrees, if requested by
the Company and an underwriter of equity securities of the Company, not to
offer, sell, contract to sell or otherwise dispose of any Registrable
Securities, or any securities convertible into or exchangeable or exercisable
for such securities during the 90-day period beginning on the effective date of
the registration statement of the Company filed under the Securities Act with
respect to the offering of such equity securities (other than the Registrable
Securities to be sold pursuant to such registration statement); provided that
all executive officers and directors of the Company enter into similar
arrangements.

     SECTION 5.4. 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

          Commonwealth Telephone Enterprises, Inc.
          100 CTE Drive
          Dallas, Pennsylvania  18612
          Attention:  General Counsel
          Telecopy:

          with a copy to:

          Davis Polk & Wardwell
          450 Lexington Avenue
          New York, New York 10017
          Attention: William L. Taylor, Esq.
          Telecopy: (212) 450-4800

          if to the Shareholders to:

                                                                   Page 10 of 14
<PAGE>

          c/o Level 3 Communications Inc.
          1025 Eldorado Blvd.
          Broomfield, CO 80021
          Telecopy: (720) 888-5619
          Attention:  General Counsel

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 shall be effective when delivered at the address
specified in this Section 5.

     SECTION 5.5. Amendments; No Waivers.

     (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 each Shareholder and the Company, 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 5.6. Successors and Assigns. (a) The provisions of this Agreement
shall be binding upon and inure to the benefit of the parties hereto and their
respective heirs, legal representatives, successors and permitted assigns;
provided that except as set forth in Section 5.6(b) of this Agreement, no party
may assign, delegate or otherwise transfer any of its rights or obligations
under this Agreement, directly or indirectly, whether by operation of law or
otherwise, without the written consent of the other party hereto, and any
attempted assignment contrary to the terms hereof shall be null and void.
Neither this Agreement nor any provision hereof is intended to confer upon any
Person other than the parties hereto any rights or remedies hereunder.

     (b) Notwithstanding the provisions of Section 5.6(a) hereof, a Shareholder
may transfer and assign its rights and obligations under this Agreement
(including the rights of a Shareholder with respect to both Demand
Registrations and Piggyback Registrations pursuant to Sections 2.1 and 2.2
hereof) without the prior written consent of the Company under the following
circumstances:

     (i) the transfer by a deceased person to his or her executors or heirs or
by an incompetent person to his or her legal guardian;

     (ii) the transfer by a Shareholder to any Person to whom such Shareholder
has sold in a bona fide private placement transaction either: (x) a minimum of
1,500,000 shares of Registrable Securities (as adjusted for any stock
dividends, combinations, splits, recapitalizations and the like) or (y)
Registrable Securities representing the right to cast at least 6,500,000 Votes;

                                                                   Page 11 of 14
<PAGE>

provided that, as to both clauses (x) and (y) above, either: (A) an offering
pursuant to a Demand Registration in respect of not less than 2,500,000
Registrable Securities (as adjusted for any stock dividends, combinations,
splits, recapitalizations and the like) shall have been consummated hereunder
or (B) Level 3 or Delaware Holdings shall have sold in a bona fide private
placement transaction Registrable Securities representing the right to cast at
least 6,500,000 Votes; and

     (iii) the transfer by a Shareholder to any Subsidiary of the Shareholder,
provided such entity continues as a Subsidiary to such transferring or
assigning Shareholder to and including the time such Subsidiary exercises any
of its rights hereunder.

     (c) Prior to any transfer or assignment of rights under Section 5.6(b)
hereof, the transferring or assigning Shareholder shall provide the Company
with notice of the transferee's or assignee's name and address and of the
Registrable Securities with respect to which such rights are being transferred
or assigned. The transferee or assignee of rights under Section 5.6(b) hereof
shall assume the obligations of the transferring or assigning Shareholder under
this Agreement in a written instrument delivered to the Company, whereupon the
transferring and assigning Shareholder shall be released from all liability
under this Agreement other than, and solely with regard to, the provisions of
Section 3.2 of this Agreement.

     SECTION 5.7. 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 when each party hereto shall have
received a counterpart hereof signed by the other parties hereto.

     SECTION 5.8. Entire Agreement. This Agreement constitutes the entire
agreement between the parties hereto with respect to the subject matter hereof
and supersede all prior agreements, understandings and negotiations, both
written and oral, between the parties hereto with respect thereto.

     SECTION 5.9. Governing Law. This Agreement shall be construed in
accordance with and governed by the laws of the State of New York, without
regard to the conflicts of law rules of such state.

     SECTION 5.10. Jurisdiction. Except as otherwise expressly provided in this
Agreement, the parties hereto agree that any suit, action or proceeding seeking
to enforce any provision of, or based on any matter arising out of or in
connection with, this Agreement or the transactions contemplated hereby shall
be brought in the United States District Court for the Southern District of New
York or any New York State court sitting in the Borough of Manhattan, and each
of the parties hereby consents to the jurisdiction of such courts (and of the
appropriate appellate courts therefrom) in any such suit, action or proceeding
and irrevocably waives, to the fullest extent permitted by law, any objection
which it may now or hereafter have to the laying of the venue of any such suit,
action or proceeding in any such court or that any such suit, action or
proceeding which is brought in any such court has been brought in an
inconvenient forum. Process in any such suit, action or proceeding may be
served on any party anywhere in the world, whether within or without the
jurisdiction of any such court. Without limiting the foregoing, each party

                                                                   Page 12 of 14
<PAGE>

agrees that service of process on such party as provided in Section 5.4 shall
be deemed effective service of process on such party.

     SECTION 5.11. WAIVER OF JURY TRIAL. EACH OF THE PARTIES HERETO HEREBY
IRREVOCABLY WAIVES ANY AND ALL RIGHT TO TRIAL BY JURY IN ANY LEGAL PROCEEDING
ARISING OUT OF OR RELATED TO THIS AGREEMENT OR THE TRANSACTIONS CONTEMPLATED
HEREBY.

     SECTION 5.12. Headings. The headings contained in this Agreement are for
reference purposes only and shall not in any way affect the meaning of
interpretation of this Agreement.

                                                                  Page 13 of 14
<PAGE>

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

COMMONWEALTH TELEPHONE ENTERPRISES, INC.

By: /s/ Michael J. Mahoney
    -----------------------------------------
    Name:  Michael J. Mahoney
    Title: President and CEO

LEVEL 3 COMMUNICATIONS, INC.

By: /s/ Thomas C. Stortz
    -----------------------------------------
    Name:  Thomas C. Stortz
    Title: Group VP and General Counsel

                                                                   Page 14 of 14

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