Document:

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                                 PROMISSORY NOTE

$2,000,000                                                     April 2, 2001

         FOR VALUE RECEIVED, the undersigned, LOGIX COMMUNICATIONS CORPORATION,
an Oklahoma corporation ("Borrower"), hereby promises to pay to the order of
DOBSON CC LIMITED PARTNERSHIP, an Oklahoma limited partnership ("Lender"), at
13439 N. Broadway Extension, Suite 200, Oklahoma City, Oklahoma 73114, the sum
of Two Million and no/100 Dollars ($2,000,000.00), together with accrued and
unpaid interest thereon (the "Loan").

         The outstanding principal balance of the Loan and accrued interest
thereon shall bear interest at a rate per annum equal to the lesser of (i) the
Maximum Rate (as hereafter defined); or (ii) the "Prime Rate" as hereafter
defined, plus two percent (2.0 %). Interest shall be computed in arrears based
on a three hundred sixty (360) day year counting the actual number of days
elapsed.

         The "Prime Rate" as used herein shall be the per annum interest rate
announced publicly by the management of Bank of America, N.A. (the "Bank") or
its successor as the Bank's base rate on commercial loans being made, or to be
made, by the Bank in Oklahoma City, Oklahoma as the same may be changed from
time to time.

         Regardless of any provision contained in this Note, Lender shall never
be entitled to contract for, charge, take, reserve, receive, or apply, as
interest on the Loan, or any part thereof, any amount in excess of the maximum
non-usurious rate of interest which, under applicable law, Lender is permitted
to contract for, charge, take reserve, or receive on the Loan ("Maximum Rate"),
and if Lender does so, then such excess shall be deemed a partial prepayment of
principal and treated hereunder as such and any remaining excess shall be
refunded to Borrower. Lender shall not, to the extent permitted by law, be
subject to any penalties provided by any laws for contracting for charging,
taking, reserving, or receiving interest in excess of the Maximum Rate.

         Interest only shall be payable in quarterly installments beginning June
30, 2001, and ending December 31, 2001. Principal shall be paid in twelve (12)
equal quarterly installments beginning March 31, 2002. All such principal
payments shall include accrued and unpaid interest. All principal and accrued
interest shall be payable on December 31, 2004.

         The term "Default" means the occurrence of any one or more of the
following events:

         (a) Failure to pay the interest, principal or any other obligation
under this Note when the same becomes due (whether by its terms, by
acceleration, or otherwise).

         (b) If Borrower or Logix Communications Enterprises, Inc. ("Parent")
(i) voluntarily seeks, consents to, or acquiesces in the benefit of any Debtor
Relief Law, OTHER THAN as a creditor or claimant, or (ii) becomes a party to or
is made the subject of any proceeding provided for by any Debtor Relief Law,

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OTHER THAN as a creditor or claimant, that could suspend or otherwise adversely
affect the Rights of Lender granted in this Note (UNLESS, in the event such
proceeding is involuntary, the petition instituting same is dismissed within 30
days after its filing).

         (c) If a default occurs under Parent's 12 1/4% Senior Notes due 2008,
issued by Parent pursuant to an Indenture dated as of June 12, 1998, between
Dobson Wireline, Inc., as issuer, and United States Trust Company of New York,
as trustee.

         (d) If Borrower or Parent fails to pay when due (after lapse of any
applicable grace periods) any debt (OTHER THAN this Note) in excess
(individually or collectively) of $1,000,000

         (e) If a default occurs under any other obligation of Borrower or
Parent to Lender.

         (f) If Borrower or Parent fails, within 60 days after entry, to pay,
bond, or otherwise discharge any judgment or order for the payment of money in
excess of $1,000,000 or any warrant of attachment, sequestration, or similar
proceeding against any of Borrower or Parent's assets having a value
(individually or collectively) of $1,000,000 or more which is not stayed on
appeal.

         Upon the occurrence of any event of Default and as often as any event
of Default shall occur, at the option of the holder, the entire indebtedness
evidenced hereby will become due, payable and collectible then or thereafter as
the holder may elect, regardless of the date of maturity hereof. To the extent
permitted by applicable Law, notice of the exercise of such option is hereby
expressly waived. Failure by the holder to exercise such option will not
constitute a waiver of the right to exercise the same in the event of any
subsequent default.

         The acceptance by the Lender of any payment which is less than the
total of all amounts due and payable at the time of such payment shall not
constitute a waiver of the right to exercise any of the foregoing remedies or
options at that time or any subsequent time, or nullify any prior exercise of
such remedy or option, without the express consent of the Lender.

         Any sum not paid when due will bear interest at the rate equal to the
lesser of (i) the Maximum Rate, or (ii) five percent (5%) in excess of the Prime
Rate, and such interest which has accrued will be paid at the time of and as a
condition precedent to the curing of any Default hereunder. During the existence
of any such Default, the holder of this Note may apply payments received on any
amount due hereunder or under the terms of any instrument now or hereafter
evidencing or securing said indebtedness as said holder may determine.

         The Borrower agrees that if, and as often as, this Note is placed in
the hands of an attorney for collection or to defend or enforce any of the
holder's rights hereunder or under any instrument securing payment of this Note,
the Borrower will pay to the holder its reasonable attorney's fees and all court
costs and other expenses incurred in connection therewith, whether or not an
action shall be instituted to enforce this Note.

         This Note is issued by the Borrower and accepted by the holder hereof
pursuant to a lending transaction negotiated, consummated and to be performed in
the State of Oklahoma, this Note is to be construed according to the laws of the
State of Oklahoma.

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         For the purpose of computing interest under this Note, payments of all
or any portion of the principal sum owing under this Note will not be deemed to
have been made until such payments are received by the holder of this Note in
collected funds.

         If any provision of this Note or the application thereof to any party
or encumbrance is held invalid or unenforceable, the remainder of this Note and
the application of such provision to other parties or circumstances shall not be
affected thereby, the provisions of this Note being severable in any such
instance.

         Each of the Borrower and Lender hereby irrevocably: (i) submits and
consents, and waives any objection to personal jurisdiction in the State of
Oklahoma for the enforcement of this Note, and (ii) waives any and all personal
rights under the law of any state to object to jurisdiction in the State of
Oklahoma for the purposes of litigation to enforce this Note. The Borrower
further consents to the venue of any state or federal court sitting in Oklahoma
County, Oklahoma in any action arising under this Note. Initiating such
proceeding or taking such action in any other state shall in no event constitute
a waiver of the agreement contained herein that the law of the State of Oklahoma
shall govern the rights and obligations of the Borrower and the holder
hereunder, or of the submission herein made by the Borrower to personal
jurisdiction within the State of Oklahoma.

         The makers, endorsers, sureties, guarantors and all other persons who
may become liable for all or any part of this obligation severally waive
presentment for payment, protest and notice of nonpayment and notice of
intention to demand payment of this Note. Said parties consent to any extension
of time (whether one or more) of payment hereof, release of all or any part of
the security for the payment hereof and the release of any party liable for
payment of this obligation. Any such extension of time or release may be made at
any time and from time to time without notice to any such party and without
discharging said party's liability hereunder. SUCH PARTIES FURTHER SEVERALLY
WAIVE THE RIGHT TO TRIAL BY JURY IN ANY AND EVERY ACTION OR PROCEEDING OF ANY
KIND OR NATURE UNDER OR BY REASON OF OR RELATING IN ANY WAY TO THIS NOTE, THE
CAPITAL CONTRIBUTION AGREEMENT OR ANY OF THE MATTERS REFERRED TO HEREIN.

                                        LOGIX COMMUNICATIONS CORPORATION

                                        By:   /s/ Craig T. Sheetz
                                            -----------------------------------
                                             Craig T. Sheetz
                                             Executive Vice-President
                                             and Chief Financial Officer<Page>
                                                                 Exhibit 10.23

                               SECURITY AGREEMENT

                  THIS SECURITY AGREEMENT is executed and delivered as of this
29th day of May, 2001, by LOGIX COMMUNICATIONS CORPORATION, an Oklahoma
corporation ("Debtor"), to DOBSON CC LIMITED PARTNERSHIP, an Oklahoma limited
partnership ("Secured Party").

                  In consideration of the mutual covenants herein contained, and
other good and valuable considerations, the receipt and adequacy of which are
hereby acknowledged, Debtor and Secured Party agree as follows:

         1. SECURITY INTEREST. Debtor hereby grants, bargains, sells, and
conveys unto Secured Party a security interest in and to all of the following
property now owned or at any time hereafter acquired by the Debtor or in which
Debtor now has or at any time in the future may acquire any right, title or
interest therein (a) all inventory (as defined in the UCC) and stock in trade of
Debtor, and all other property of the same or similar nature now owned or
hereafter acquired by Debtor, together with all proceeds as defined in the UCC
and products thereof and replacements therefor ("Inventory"), (b) all material
items of furniture, fixtures and leasehold improvements of Debtor, now owned or
hereafter acquired, together with all proceeds as defined in the UCC and
products thereof and replacements therefor ("Furniture, Fixtures and Leasehold
Improvements"), (c) equipment, appliances and machinery, now owned or hereafter
acquired by Debtor, and which are necessary for the operation of the Debtor's
business, as presently conducted, together with all proceeds as defined in the
UCC and products thereof and replacements therefor ("Equipment"), (d) all
accounts, goods, documents, instruments, contract rights, and chattel paper (in
each case as defined in the UCC) ("Accounts") and all proceeds (as defined in
the UCC) thereof, (e) general intangibles, including without limitation,
goodwill, inventions, designs, patents, trademarks or service marks or
applications therefor, trade names, rights under license, franchise or other
agreements, interests arising from leases, purchase agreements or other
contracts covering real or personal property, tax refunds or claims therefor,
warranty or guaranty claims, condemnation awards or proceeds, security interests
or other security or collateral, all other personal property of any kind or
nature and any right, title or interest therein, all books, records, credit
files, customer lists, computer programs, printouts, software, manuals, data,
materials and records pertaining to any of the foregoing, and all insurance
policies insuring any of the foregoing and all proceeds (as defined in the UCC )
thereof ("Intangibles") investment property, chattel paper (including tangible
and electronic chattel paper), deposit accounts , payment intangibles and
healthcare insurance receivables (in each case, as defined in the UCC). The
Inventory, Furniture, Fixtures and Leasehold Improvements, Equipment, Accounts
and Intangibles are hereafter referred collectively as the "Collateral." The
tangible personal property included in the Collateral includes, but is not
limited to, property located at the locations identified on EXHIBIT "A". "UCC"
shall mean the Uniform Commercial Code as in effect on the date hereof in the
State of Oklahoma, provide that to the extent any terms herein are defined in
revisions to such Uniform Commercial Code that will be effective as of July 1,
2001, for such purposes, references to the UCC shall be to such revised Uniform
Commercial Code.

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         2. OBLIGATIONS SECURED. The security interest created hereby is granted
to secure the due, punctual and complete performance by Debtor of all
obligations now or hereafter owed by Debtor to Secured Party or any affiliate of
Secured Party, including without limitation the indebtedness evidenced by any
and all promissory notes of Debtor in favor of Secured Party, and any
indebtedness evidenced by check, note, draft or open account obligations of
Debtor for inventory purchases, and all obligations arising under leases, supply
agreements, franchise agreements and service agreements, if any ("Obligations")
including, but not limited to, the promissory notes listed on Exhibit "B" hereto
(the "Notes").

         3. SALE OR ENCUMBRANCE. Except as approved in writing by Secured Party,
Debtor will neither (a) sell, transfer, lease, or otherwise dispose of any item
of Inventory, other than in the ordinary course of business nor (b) create or
permit the existence of any lien, encumbrance, or security interest of any kind
on any of the Collateral; provided, however, that (i) the granting by the Debtor
of, or permitting to exist, a security interest on one or more items of personal
property that constitutes Collateral to secure the payment of the purchase price
for such item or items of personal property, and (ii) the granting of the
subordinate security interest described in Paragraph 6.1, are expressly
permitted.

         4. BOOKS AND RECORDS. Debtor agrees to maintain complete and accurate
books of account covering the Collateral and, at Debtor's expense, deliver to
Secured Party such of the books as relate to the Collateral, if and when
requested by Secured Party or upon the occurrence of an Event of Default,
including, without limitation, all agreements, documents and instruments of any
kind or nature relating to the Collateral. Secured Party or its authorized
agents shall at all reasonable times have access to Debtor's ledgers, books of
account, and other written records evidencing or relating to the Collateral and
Secured Party or such agents, at Debtor's expense, may make abstracts from any
such ledgers, books of account or records. Secured Party or its authorized
agents shall at all reasonable times and as often as reasonably desired have the
right to be present at Debtor's places of business to examine all
communications, documents and remittances relating to the Collateral and to
discuss the business, operations, properties and financial and other condition
of Debtor with officers and employees of Debtor and its independent certified
accountants.

         5. INSURANCE. Debtor will continuously maintain or cause to be
continuously maintained insurance on the tangible personal property included in
the Collateral by an insurer approved by Secured Party, against such risks and
in such amounts as is required by Secured Party, with such deductibles,
endorsements, and form of loss payable clause in favor of Secured Party as are
acceptable to Secured Party. Upon the request of Secured Party, Debtor will
deliver promptly policies or certificates of insurance evidencing such coverage,
together with evidence of the payment of all premiums therefor, to Secured
Party.

         6. REPRESENTATIONS AND WARRANTIES AND COVENANTS. Debtor hereby
represents and warrants to Secured Party as follows:

                  6.1 AUTHORIZATION, EXECUTION, ORGANIZATION, ETC. Debtor is an
Oklahoma corporation, duly organized, validly existing and in good standing
under the laws of the State of Oklahoma. Debtor is authorized to do business in
all states in which such qualification is necessary. Debtor has obtained all
consents, approvals, permits and permissions related to the transactions herein
contemplated and required under any covenant, agreement, encumbrance, law

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or regulation. Debtor has the capacity and authority to incur the Obligations
and enter into this Agreement and consummate the transactions herein provided
and nothing prohibits or restricts the right or ability of Debtor to carry out
the terms hereof. The agreements evidencing the Obligations and Agreement and
all agreements, instruments and documents herein provided to be executed or to
be caused to be executed by Debtor hereunder will be duly authorized, executed
and delivered by and are binding upon Debtor and are enforceable in accordance
with the terms hereof and thereof. Neither this Agreement nor any agreement,
document or instrument executed or to be executed in connection with the same,
nor anything provided in or contemplated by this Agreement or any such other
agreement, document or instrument, does nor or shall hereafter breach,
invalidate, cancel, make inoperative or interfere with, or result in the
acceleration or maturity of, any agreement, document, instrument, right or
interest, affecting or relating to Debtor or all or any portion of the
Collateral. There are no actions, suits or proceedings pending or, to Debtor's
knowledge, threatened, before or by any judicial, administrative or union body,
any arbiter or any governmental authority, against or affecting the Collateral
(or any portion thereof) or the power or right of Seller to incur the
Obligations or carry out the provisions of this Agreement.

                      6.2 OWNERSHIP OF COLLATERAL. Debtor owns the Collateral
and is not prohibited by contract or otherwise from subjecting the Collateral to
the security interest created hereby. The Collateral is free and clear of all
security interests and encumbrances of every nature, except the security
interest created hereby, a subordinate security interest created by a security
agreement executed by Debtor in favor of Logix Communications Enterprises, Inc.,
and liens for taxes not delinquent.

                      6.3 MAINTENANCE.  Debtor will maintain the tangible
personal property included in the Collateral and keep it in good condition and
repair.

                      6.4 TAXES.  Debtor will pay, before any delinquency, any
tax or other governmental charge which is or may become through assessment,
distraint, or otherwise a lien or charge on the Collateral, or any portion
thereof, or any interest therein, and will pay any tax which may be levied on
any obligation secured hereby.

                      6.5 DEBTOR'S  ORGANIZATION  AND PLACE OF BUSINESS. Debtor
will not change its name or state of incorporation without the prior written
consent of Lender, which may be conditioned on such action (including UCC
filings) as Lender may require in order to preserve its first priority security
interest in the Collateral. Debtor's principal place of business and the
location of its chief executive office (and the place where all books and
records relating to the Collateral are maintained) is set forth below the
signature of Debtor. Debtor will advise Secured Party of each location where any
Collateral is located and will not remove the Collateral from such location
unless and until Secured Party's security interest hereunder is perfected in
such a manner as to assure the continued priority of the security interest
created hereby. Debtor will not change its chief executive office or principal
place of business, its name or the place where its books and records relating to
the Collateral are maintained or the state of its incorporation without giving
at least 30 days' prior written notice to Secured Party.

                      6.6 PLEDGE AND SECURITY AGREEMENT. The Debtor is an
organization organized solely under the laws of the State of Oklahoma and no
other state or jurisdiction. Neither

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any state (other than Oklahoma) nor the United States must maintain a public
record showing the Debtor to be organized.

                      6.7 FINANCING STATEMENTS. Debtor will execute and deliver
to Secured Party such financing statements, continuation statements,
certificates and other documents or instruments as may be necessary to enable
Secured Party to perfect or from time to time renew the security interest
created hereby including, without limitation, such financing statements,
certificates and other documents as may be necessary to perfect the security
interest created hereby in any Collateral hereafter acquired by Debtor or in any
replacements or proceeds of the Collateral.

                      6.8 CONTRACTS, LICENSES, TRADEMARKS, ETC. Debtor will
maintain in full force and effect all material contracts, licenses, trademarks,
trade names, patents, and other similar rights constituting part of the
Collateral and will not modify or amend any such material contracts or rights on
terms that are less favorable to the Debtor than existed immediately prior to
such modification or amendment, without the prior written consent of Secured
Party.

                      6.9 BANK ACCOUNTS. Debtor will not commingle its cash or
securities with those of any corporation controlling, controlled by or under
common control with Debtor or any other person or entity, and will at all times
maintain bank accounts which are separate from those of any such corporation,
person or entity.

                      6.10 INDEMNITY. Debtor will indemnify and hold Secured
Party harmless from and against any and all claims, damages, loss, liability or
judgments which may be incurred or sustained by Secured Party or asserted
against Secured Party, directly or indirectly, in connection with the existence
of or the exercise of any of the rights of Secured Party under this Agreement.

                      6.11 EXPENSES. Debtor will reimburse Secured Party for all
expenses, including attorneys' fees and legal expenses, incurred by Secured
Party in seeking to preserve or protect the Collateral or enforce its rights
hereunder, including the expenses of retaking possession of and maintaining and
preserving the Collateral.

                      6.12 PAYMENT. Debtor will pay Secured Party all amounts
payable in respect of the Obligations to Secured Party as and when the same are
due and payable, whether at maturity, by acceleration or otherwise, and will
perform all terms of any notes, and all other indebtedness of Debtor to Secured
Party, and will discharge all of such liabilities.

                      6.13 LOCATION OF COLLATERAL. Debtor will not permit any of
the Collateral to be removed from its present location without the prior written
consent of Secured Party, other than in connection with the sale of Inventory in
the ordinary course of business. The Inventory and Equipment and the books and
records pertaining to the Collateral are kept at the locations listed on
Schedule A.

                      6.14 POSSESSION OF DEBTOR'S PREMISES. Should Secured Party
at any time have the right to take possession of the Collateral, Debtor hereby
grants to Secured Party the irrevocable right to occupy and use, for any purpose
directly or indirectly relating to the protection of Secured Party's rights
hereunder and without charge, any premises within or upon which the Collateral
may be located, for a period of 60 days, commencing with such taking of
possession.

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                      6.15 No amount payable to the Secured Party under or in
connection with the Collateral is evidence by an instrument or chattel paper (as
each such term is defined in the UCC).

                      6.16 The security interest granted under the Pledge
Agreement is a first priority perfected security interest.

                      6.17 If any of the Collateral shall be or become evidenced
or represented by any instrument, certificated security or chattel paper (as
each such term is defined in the UCC) such instrument, certificated security or
chattel paper shall be immediately delivered to the Secured Party, duly endorsed
in a manner satisfactory to the Secured Party to be held as Collateral pursuant
to this Security Agreement.

         7. WAIVER. No waiver or modification by Secured Party of any of the
terms and conditions hereof shall be effective unless reduced to writing and
signed by Secured Party. No waiver or indulgence by Secured Party as to any
required performance by Debtor hereunder shall constitute a waiver as to any
subsequent required performance or any other obligation of Debtor hereunder.

         8. PERFORMANCE BY SECURED PARTY. In the event Debtor at any time fails
to perform any Obligation for which it is obligated hereunder including, without
limitation, any payment of taxes, insurance premiums, or other sums of money
required to be paid hereunder, Secured Party may, but shall be under no
obligation to do so, pay such amount as is required to be paid, in which event
Secured Party shall be immediately reimbursed therefor by Debtor. Such amounts
paid by Secured Party shall be deemed a portion of the indebtedness secured
hereby, and such items shall bear interest from the date incurred by Secured
Party until paid by Debtor at the greater of the rate specified in the Notes for
interest accruing after an Event of Default or the highest lawful rate.
Provided, however, the accrual of interest hereunder shall not prejudice any
other remedies which may be available to Secured Party hereunder.

         9. DEFAULT. Debtor shall be in default hereunder in the event of the
occurrence of any of the following ("Events of Default"):

                      a. the failure to make any payment required pursuant to
any of the Obligations as it becomes due,

                      b. any representation or warranty of Debtor is incorrect,
false or misleading in any material respect when made,

                      c. Debtor fails to observe or perform any of the covenants
or agreements contained in this Agreement and which failure extends for a period
of thirty (30) days or more after Secured Party gives notice thereof to Debtor,

                      d. Debtor fails to observe or perform any other covenant
or agreement of any of the Obligations other than the payment of money which
continues for a period of thirty (30) days after Secured Party gives notice
thereof to Debtor, or

                      e. an event of default occurs and is continuing under any
other agreement between Debtor and Secured Party.

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                      f. any Event of Default occurs, as defined in the Pledge
and Security Agreement dated as of May 29, 2001 between Secured Party and Logix
Communications Enterprises, Inc.

                      g. the Secured Party receives at any time after the
execution hereof and prior to payment of all of the Obligations, a report from
any office in which filings have been made perfecting the security interest
created hereby indicating that the Secured Party's security interest is not
prior to all other security or other interests reflected in such report.

                      h. Debtor shall (i) apply for or consent to the
appointment of a receiver, trustee, custodian, intervenor or liquidator of all
or a substantial part of its assets, (ii) file a voluntary petition in
bankruptcy or file a petition or answer seeking reorganization of an arrangement
with creditors or to take advantage of any Debtor Laws, (iii) admit in writing
that it is unable to pay its debts as they become due or generally not pay its
debts as they become due, (iv) make a general assignment for the benefit of
creditors, (v) file an answer admitting the material allegations of, or consent
to, or default in answering, a petition filed against it in any bankruptcy,
reorganization or insolvency proceeding or (vi) take corporate action for the
purpose of effecting any of the foregoing; or (i) an involuntary petition or
complaint is filed against Debtor seeking bankruptcy or reorganization of
Debtor, or the appointment of a receiver, custodian, trustee, intervenor or
liquidator for Debtor, or for all or substantially all of Debtor's assets, and
such petition or complaint is not dismissed within 60 days of the filing
thereof, or (ii) an order, judgment or decree shall be entered by any Tribunal
approving a petition or complaint seeking reorganization of Debtor or appointing
a receiver, custodian, trustee, intervenor or liquidator for Debtor, or of all
or substantially all of Debtor's assets, as applicable, and such order, judgment
or decree continues unstayed for a period of 60 days.

                      i. Any "Event of Default" occurs under the Pledge and
Security Agreement dated as of May 29, 2001 between Logix Communications
Enterprises, Inc. and the Secured Party, as amended, modified or supplemented
from time to time.

                      j. This Security Agreement shall cease for any reason to
be in full force and effect, or the Debtor shall so assert, or the lien or
security interested created under this Security Agreement shall cease to be
enforceable and of the same effect and priority purported to be created
hereunder.

         10. REMEDIES. If an Event of Default occurs, Secured Party may declare
all the Obligations to be immediately due and payable and shall be entitled to
exercise all remedies available hereunder or under law. Without limiting the
foregoing, at the request of Secured Party, Debtor will assemble the Collateral
and make it available to Secured Party at a place designated by Secured Party
reasonably convenient to both parties. A period of five (5) days from the time
the notice is sent shall be a reasonable period for notification of any sale or
other disposition of Collateral by or for Secured Party. Debtor agrees to pay,
on demand, the amount of all expenses incurred by Secured Party in protecting,
preserving, storing, and selling the Collateral. If this Security Agreement, or
any obligation secured hereby is referred to an attorney for protecting,
defending, or enforcing the provisions hereof, Debtor shall pay a attorneys'
fee, expenses of title search, and all court costs and costs of public officials
and all costs (including, but not limited to attorneys' fees and expenses)
incurred by Secured Party in the taking possession of, preservation,
maintenance, and sale of the Collateral, which amounts shall be deemed a portion
of the indebtedness secured hereby, and any

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and all such items shall bear interest from the date incurred by Secured Party
until repaid by Debtor at the rate specified in the Note for interest accruing
after an Event of Default. The Secured Party may dispose of the Collateral in
its condition at the time it is made available or following any commercially
reasonable preparation or processing. The Secured Party may comply with any
applicable State or federal law requirements in connection with a disposition of
the Collateral, and compliance therewith will not be considered to adversely
affect the commercial reasonableness of any sale of the Collateral. The Secured
Party may specifically disclaim warranties of title and the like.

                  Notwithstanding anything to the contrary contained herein,
Secured Party shall have the right at any time and from time to time during any
uncured Event of Default, without notice, to notify any of Debtor's account
debtors that Accounts have been assigned to Secured Party, to forward all
invoices to such account debtors directing them to make payments to Secured
Party, to collect all accounts in its or Debtor's name and to take control of
any cash or non-cash proceeds of accounts and of any returned or repossessed
goods.

                  If the Secured Party sells any of the Collateral upon credit,
the Debtor will be credited only with payments actually made by the purchaser
and received by the Secured Party. In the event the purchaser fails to pay for
the Collateral, the Secured Party may resell the Collateral and the Debtor shall
be credited with the proceeds of the sale.

         11. GOVERNING LAW. This Security Agreement shall be governed by, and
construed in accordance with, the internal laws of the State of Oklahoma.

         12. NOTICES. All notices, requests, demands, instructions, and other
communications required hereunder or contemplated hereby shall be given to
Debtor in the manner and to the addresses set forth below and to Secured Party
as follows:

                           Dobson CC Limited Partnership
                           14201 Wireless Way
                           Oklahoma City, Oklahoma  73134

         13. ENTIRE AGREEMENT; NO ORAL MODIFICATIONS. This Agreement embodies
all representations, warranties, and agreements of the parties and may not be
altered or modified except by an instrument in writing signed by the parties.

         14. REMEDIES CUMULATIVE. The various rights, powers, elections, and
remedies of Secured Party are cumulative, and no one of them is exclusive of the
others or exclusive of any right or remedy allowed by law, and no right shall be
exhausted by being exercised on one or more occasions.

         15. BENEFIT OF AGREEMENT. This Agreement shall be binding upon, and
shall inure to the benefit of, the parties and their respective successors,
legal representatives and assigns.

         16. SECTION HEADINGS. The section headings contained in this Agreement
are for convenient reference only and shall not in any way affect the meaning or
interpretation of this Agreement.

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         17. FILING. A carbon, photographic or other reproduction of this
Security Agreement or any financing statement executed pursuant hereto may be
filed as a financing statement.

                  EXECUTED AND DELIVERED the day and year first above written.

DEBTOR:                                LOGIX COMMUNICATIONS CORPORATION,
                                       an Oklahoma corporation
                                       By
                                          --------------------------------------
                                           Craig T. Sheetz
                                           President and Chief Executive Officer

                                       Address:

                                           14101 Wireless Way
                                           Oklahoma City, OK  73134
                                           Attn:  Herbert Kenney, Esq.
                                           General Counsel

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                                  EXHIBIT "A"

                                   [LOCATIONS]

           LOGIX
  COMMUNICATIONS
     CORPORATION
<Table>
<Caption>
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     LOC.#                    LANDLORD                           ADDRESS                         DESCRIPTION
-------------------------------------------------------------------------------------------------------------
     <S>      <C>                                 <C>                                  <C>
       1                   TNT Properties                         The Petroleum Inc.                  Switch
                                                           203 W. 54th Ave, Ste. 305
                                                                   Amarillo,TX 79101

       2                  Dilch Ranch Part.              The Atrium at Coulter Ridge                   Sales
                                                           89001 I-40 West, Ste. 240
                                                                  Amarillo, TX 79108

       3                    Dupont Group                      Lake Shore Towers, LTD          Switch & Sales
                                                              210 Barton Springs Rd.
                                                                    Austin, TX 78704

       4               Lake Ats. Commons, Ltd                          Harland Plaza                   Sales
                                                           1717 West 6th St, Ste 212
                                                                    Austin, TX 78702

       5             US Realty & Investment Co.                      115 North Upper                   Sales
                                                                   Broadway, Ste 105
                                                            Corpus Christi, TX 78477

<Page>

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       6                Beverly Hills Center               2323 Bryan St., 1st Floor          Switch & Sales
                                                                          Dallas, TX

       7              NeXcomm Asst. Acquisition                             Inlomart          Switch & Sales
                                                                   1930 Stemmons Fwy
                                                                          Dallas, TX

       8             Quontom Office Investers,Lp                                                       Sales
       9                  7810 Stemmons,LP.               7810 Stemmons Fwy, Ste 420                  Vacant
                                                                    Dallas, TX 75247

       10              Merit Texas Properties                          Parkway Plaza                  Vacant
                                                             14114 N. Dallas Parkway
                                                                    Dallas, TX 75247

       11                 ICC Texas Holding            4110 Rio Bravo Drive, Ste 222                   Sales
                                                                   El Paso, TX 78902

       12                   Equity Office                    1300 Summit Office Park            Sales Office
                                                                       Ft. Worth, TX

       13                    Vista Oaks                          Centro One Building                   Sales
                                                                   9800 Centro Prkwy
                                                                         Houston, TX

       14                Equity Office Grp.                  One Brook Hollow Center                   Sales
                                                                   2950 N. Loop West
                                                                         Houston, TX

       15                Caption's Portfolio                    50 Briar Hollow Lane
                                                                    Houston, TX 7702

<Page>

       16                 Wedge Int. Tower                          Wedge Int. Tower          Switch & Sales
                                                            1415 Louisiana Bldg. Ste
                                                                    Houston, TX 7702

       17               North Borough Center                     Three North Borough                  Switch
                                                            12707 North Frwy ste 590
                                                                  Houston, TX 770020

       18                   One West Loop                        One West Loop Plaza               Equipment
                                                             2425 W. Loop S, Ste 634
                                                                         Houston, TX

       19               Real Estate Services                    6353 Woodway Ste 362               Equipment
                                                                   Houston, TX 77057

       20                 Wedge Int. Tower                          Wedge Int. Tower                   Sales
                                                            1415 Louisiana Bldg. Ste
                                                                    Houston, TX 7702

       21                  York Town Plaza                   5353-5373 W. Alabama St       Telephone Factory
                                                                         Houston, TX

       22              First Little Rock Plaza                             Suite 299           Vacant Office
                                                               Little Rock, AR 72211

       23               Nalco Reality Company               304-305 N. Meridian Ave.               Warehouse
                                                               Okalahoma City, 73107

<Page>

       24                     Box Plaza                             Bank of OK Plaza
                                                        201 Roberts S. Kerr, Ste 825
                                                                   Oklahoma City, OK

       25              MVP Limited Partnership                1207 Pennsylvania Ave.                  Vacant

                                                                  Okalahoma City, OK
       26                   Park Ave Corp                               100 Park Ave                  Switch
                                                           Oakalahoma City, OK 73102

       27                  Landmark Towers                              3535 NW 58th               Corporate
                                                            Okalahoma City, OK 73112

       28            Renaissance Associates, LP                    del Sato Building                   Sales
                                                          7015 College Blvd. Ste 725
                                                           Owtand Park, Kansas 66201

       29              Western Properties, Ltd                          301 Broadway
                                                                  100 Taylor St. 366

       30                Crown Alamo Center                         One Alamo Center                  Switch
                                                          108 S. St. Mary's, Ste 400
                                                               San Antonio, TX 79205

<Page>

       31           One River Walk, Joint Venture                 One River walk Pl.                  Switch
                                                            700 N. St. Mary, Ste 350
                                                               San Antonio, TX 78205

       32            Main Plaza Associates, Ltd                       One Main Plaza                  Switch
                                                            510 S. Main St., Ste 120
                                                                     Tulsa, OK 74118

       33                 PCA Tulsa Bldgs.                           Southland Tower                   Sales
                                                        4111 S. Darlington, Ste 1170

       34                Duke -Weeks Reality                           Westcheler Pl                   Sales
                                                           1352 Olive Blvd. Ste# 240

       35              Charles & Barbara Hall                2354 King Stay, Suite E           Vacant Office
                                                                    Spring field, MO

       36            Southwestern Bell Telephone                  8843 Hillcrest Rd.               Co-Locate
                                                                       Dallas, Texas

       37            Southwestern Bell Telephone              750 W. Mockingbird Ln.               Co-Locate
                                                                      Dallas , Texas

       38            Southwestern Bell Telephone                       5820 Alpha Rd               Co-Locate
                                                                          Dallas, TX

       39            Southwestern Bell Telephone                      633 Lemmon Ave               Co-Locate
                                                                          Dallas, TX

       40            Southwestern Bell Telephone                     312 W. Abram St               Co-Locate
                                                                   Fort Worth, Texas

<Page>

       41            Southwestern Bell Telephone                  2310 West Lane Dr.               Co-Locate
                                                                         Houston, TX

       42            Southwestern Bell Telephone                       14101 Ashford               Co-Locate
                                                                         Houston, TX

       43            Southwestern Bell Telephone                         4412 Magnum               Co-Locate
                                                                         Houston, TX

       44            Southwestern Bell Telephone               2101 S. Dairy Ashford               Co-Locate
                                                                         Houston, TX

       45            Southwestern Bell Telephone                       1015 Richmond               Co-Locate
                                                                         Houston, TX

       46            Southwestern Bell Telephone                       1308 Richmond               Co-Locate
                                                                         Houston, TX

       47            Southwestern Bell Telephone                        909 Colorado               Co-Locate
                                                                          Austin, TX

       48            Southwestern Bell Telephone                      105 Auditorium               Co-Locate
                                                                          Austin, TX

       49            Southwestern Bell Telephone                           1405 Main               Co-Locate
                                                                     Little Rock, TX

       50            Southwestern Bell Telephone                     308 S. Akers St               Co-Locate
                                                                          Dallas, TX

       51            Southwestern Bell Telephone                        200 E. Tyler               Co-Locate
                                                                      Richardson, TX

       52            Southwestern Bell Telephone                     166 Houston St.               Co-Locate
                                                                      Fort Worth, TX

       53            Southwestern Bell Telephone                     3325 S. Western               Co-Locate
                                                                        Amarillo, TX

       54            Southwestern Bell Telephone                                                   Co-Locate

       55            Southwestern Bell Telephone                      111 Dean McGee               Co-Locate
                                                                   Oklahoma City, Ok

       56            Southwestern Bell Telephone                         14 E. First               Co-Locate
                                                                          Edmond, Ok

       57            Southwestern Bell Telephone                           510 Elgin               Co-Locate
                                                                            Tulsa,OK

       58                   GTE( Verizon)                                210 S. Main               Co-Locate
                                                                           Irvin, TX

<Page>

       59                    GTE( Valor)                             114 W. Broadway               Co-Locate
                                                                    Broken Arrow, Ok
</Table>

<Table>
<Caption>

                      DOBSON MCCLOUD TELEPHONE
-------------------------------------------------------------------------------------------------------------
     LOC.#                    LOCATION                            OWNER                          DESCRIPTION
-------------------------------------------------------------------------------------------------------------
     <S>               <C>                                        <C>                       <C>
       1                    Cheyenne, OK                                         DTC           Office/ Equip
       2                    Cheyenne, OK                                         DTC          Blue Warehouse
       3                    Cheyenne, OK                                         DTC         Cable Warehouse
       4                    Cheyenne, OK                                         DTC             Radio Tower
       5                     Camargo, OK                                         DTC        Equipment Office
       6                     Camargo, OK                                         DTC                   Tower
       7                      Erick, Ok                                          DTC           Office/Garage
       8                         24                                              DTC        Equipment Office
       9                     Reydon, OK                                          DTC        Equipment Office
       10              Roger Mills County, OK                                    DTC        Equipment Office
       11                  Sweetwater, TX                                        DTC        Equipment Office
       12                     Vici, OK                                           DTC        Equipment Office
       13                     Vici, OK                                           DTC        Equipment Office

<Caption>

                     MCCLOUND EQUIPMENT & BLDGS
-------------------------------------------------------------------------------------------------------------
     LOC.#                    LOCATION                            OWNER                          DESCRIPTION
-------------------------------------------------------------------------------------------------------------
<S>                  <C>                                          <C>                       <C>
       1                                                                         DTC              Equipment/
                                                                                            Office/Warehouse
       2                                                                         DTC                   Regen
       3                                                                         DTC                   Regen
       4                                                                         DTC                   Regen
       5                                                                         DTC                   Regen
       6                                 Turkey Hill                             DTC                   Regen
       7                                 Turkey Hill                             DTC                   Regen
       8                              Indian Meridan                             DTC                   Regen
       9                                                                         DTC                   Regen
       10                                                                        DTC                   Regen
       11                                                                        DTC                   Regen
       12                                                                        DTC                   Regen
       13                              Preston Olive                             DTC                   Regen
       14                                                                        DTC                   Regen
       15                                                                        DTC                   Regen
       16                                                                        DTC                   Regen
       17                                                                        DTC                   Regen
       18                                                                        DTC                   Regen
       19                                                                        DTC                   Regen
       20                                                                        DTC                   Regen
       21                                                                        DTC                   Regen

<Page>

       22                                                                        DTC                   Regen
       23                             Elk City Condo                             DTC               Furniture
       24                                  Jack Town                             DTC                   Regen
       25                                  Medowwood                             DTC                   Regen
       26                               Buried Cable                             DTC                   Regen
       27                                     Peebly                             DTC                  Remote
       28                                    Newalla                             DTC
</Table>

<Page>

                                   EXHIBIT "B"

<Table>
<Caption>
                                       PRINCIPAL
         DATE OF NOTE                    AMOUNT
-------------------------------     -----------------
<S>                                    <C>
          03/30/2000                        $545,000
          07/20/2000                      20,000,000
          08/02/2000                      15,000,000
          08/09/2000                       2,000,000
          08/10/2000                       7,000,000
          08/11/2000                       3,000,000
          08/15/2000                      15,000,000
          08/17/2000                       3,000,000
          12/29/2000                       4,000,000
          12/31/2000                       1,927,573
          01/29/2001                       2,000,000
          02/15/2001                       2,000,000
          03/12/2001                       2,000,000
          03/31/2001                       1,974,826
          04/02/2001                       2,000,000
                                    -----------------
                                         $81,447,398
                                    =================
</Table>

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