INPUT OUTPUT INC
GXT EMPLOYEE STOCK OPTION PLAN
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<DESCRIPTION>GXT EMPLOYEE STOCK OPTION PLAN
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                                                                    EXHIBIT 10.1




                            GX TECHNOLOGY CORPORATION
                           EMPLOYEE STOCK OPTION PLAN

         1. Purpose. This 1994 Stock Option Plan (the "Plan") is intended to
encourage stock ownership by employees and directors of GX TECHNOLOGY
CORPORATION, a Texas corporation (the "Corporation"), and its Subsidiary
Corporations, including in the Section 4.2 below a specified contractor, so that
they may acquire or increase their proprietary interest in the Corporation; and
to encourage such employees and directors to remain in the employ of the
Corporation and to put forth maximum efforts for the success of the business. It
is further intended that options granted by the Committee (as defined in Section
2 below) pursuant to Section 5 hereof shall constitute "incentive stock options"
("Incentive Stock Options") within the meaning of IRC Section 422, as amended,
and the Regulations issued thereunder (the "Code"), and options granted by the
Committee pursuant to Section 6 hereof shall constitute "nonqualified stock
options" ("Nonqualified Stock Options") that, together with Incentive Stock
Options, are referred to herein as "Options".

         2. Administration. The Plan shall be administered by the Stock Option
and Compensation Committee (the "Committee"), consisting of not less than two
members of the Board of Directors of the Corporation (the "Board"), none of whom
are or shall have been for at least one year prior to such appointment, eligible
to participate in the Plan or any other plan of the Corporation or any of its
predecessor entities entitling the participants therein to acquire stock, stock
options or stock appreciation rights of the Corporation or any of said entities.
The initial Committee shall consist of Thomas D. Barrow and the Board designee
of Nationsbanc Capital Corporation pursuant to the Securityholders Agreement
with the Corporation dated November 2, 1994, presently Douglas C. Williamson.

         2.1 Authority. The Committee shall have the authority in its
discretion, subject to and not inconsistent with the express provisions of the
Plan, to administer the Plan and to exercise all the powers and authorities
either specifically granted to it under the Plan, or necessary or advisable in
the administration of the Plan, including, without limitation, the authority to
grant Options; to determine which Options shall constitute Incentive Stock
Options and which Options shall constitute Nonqualified Stock Options; to
determine the purchase price of the shares of Common Stock covered by each
Option (the "Option Price"); to determine the persons to whom, and the time or
times at which, Options shall be granted; to determine the number of shares of
Common Stock to be covered by each Option; to interpret the Plan; to prescribe,
amend and rescind rules and Regulations relating to the Plan; to determine the
terms and provisions of the Option Agreements (which need not be identical)
evidencing Options granted under the Plan; and to make all other determinations
deemed necessary or advisable for the administration of the Plan. This authority
does not extend to the Common Stock or the granting of the Nonqualified Stock
Options of Sections 4.2 and 6 hereof respectively, said Options being those
granted as of October 31, 1994 to meet contractual commitments of employees and
a contractor of GX Technology L.P. The Committee may delegate to one or more of
its members or to one or more agents such administrative duties as it may deem
advisable, and the Committee or any delegate may employ one or more persons to
render advice with respect to any responsibility the Committee or such person
may have under the Plan.



<PAGE>

         2.2 Rules. The Board shall fill all vacancies, however caused, in the
Committee. The Board may from time to time appoint additional members to the
Committee, and may at any time remove one or more Committee members and
substitute others. One member of the Committee shall be selected by the Board as
chairman. The Committee shall hold its meeting at such times and places as it
shall deem advisable. All determinations of the Committee shall be made by a
majority of its members either present in person or participating by conference
telephone at a meeting or by written consent. The Committee may appoint a
secretary and make such rules and regulations for the conduct of its business as
it shall deem advisable, and shall keep minutes of its meetings.

         2.3 Liability. No member of the Board or Committee shall be liable for
any action taken or determination made in good faith with respect to the Plan or
any Option.

         3. Eligibility. Options may be granted to employees, Directors of the
Corporation or its present or future divisions and Subsidiary Corporations,
including in the Section 4.2 below a specified contractor. In determining the
persons to whom Options shall be granted and the number of shares to be covered
by each Option, the Committee shall take into account the duties of the
respective persons, their present and potential contributions to the success of
the Corporation sad such other factors as the Committee shall deem relevant in
connection with accomplishing the purpose of the Plan. A person to whom an
Option has been granted is sometimes referred to herein as an "Optionee." An
Optionee shall be eligible to receive more than one Option during the term of
the Plan, but only on the terms and subject to the restrictions hereinafter set
forth.

         4. Shares. The shares subject to Options hereunder shall be shares of
the Corporation's Common Stock (the "Common Stock"). Such shares may, in whole
or in part, be authorized but unissued shares or, shares that shall have been or
that may be reacquired by the Corporation.

         4.1 The aggregate number of shares of Common Stock as to which
Incentive Stock Options of Section 5 hereof may be granted from time to time
under the Plan shall not exceed 137,628 shares, provided also that a portion of
these shares shall be reserved for non-employee directors, new employees and
other members of management that are not currently shareholders of the
Corporation and that a portion of these shares may be granted to the Managers as
defined in the Stock Purchase Agreement dated November 2, 1994. The limitation
established by the preceding sentence shall be subject to adjustment as provided
in Section 7.9 hereof. If any outstanding Incentive Stock Option expires or is
terminated without having been exercised in full, the shares of Common Stock
allocable to the unexercised portion of such Option shall (unless the Plan shall
have been terminated) become available for subsequent grants of Incentive Stock
Options.

         4.2 The aggregate number of shares of Common Stock as to which
Nonqualified Stock Options of Section 6 hereof may be granted under the Plan
shall not exceed 261,500 shares, with the same to be issued within five (5) days
of approval of this Plan by the shareholder or shareholders of the Corporation
to the former owners of the Restricted Units under the Restricted Partnership
Unit Plan and the former owners of the Unit Options under the Employee Unit
Purchase Plan of GX Technology L.P., as a predecessor entity of the Corporation.




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         5. Incentive Stock Options. Options granted pursuant to this Section 5
are intended to constitute Incentive Stock Options and shall be subject to the
following special terms and conditions, in addition to the general terms and
conditions specified in Section 7 hereof.

         5.1 Value of Shares. The aggregate Fair Market Value (determined as of
the date the Incentive Stock Option is granted) of the shares of Common Stock
with respect to which Options granted under this Plan and all other option plans
of the Corporation and any Subsidiary Corporation become exercisable for the
first time by an Optionee during any calendar year shall not exceed $100,000.

         5.2 Ten Percent Stockholder. In the case of an Incentive Stock Option
granted to a 10% Stockholder, (a) the Option Price shall not be less than 110%
of the Fair Market Value of the shares of Common Stock of the Corporation on the
date of grant of such Incentive Stock Option, and (b) the exercise period shall
not exceed 5 years from the date of grant of such Incentive Stock Option.

         5.3 Vesting of Options. The Incentive Stock Options shall have a
minimum vesting of twenty-five percent (25%) over each of the four (4) years
following the date such an Option is granted.

         6. Nonqualified Stock Options. Options greeted pursuant to this Section
6 are intended to constitute Nonqualified Stock Options to be valid for a period
of ten (10) years from date of granting, the vesting and exercise prices per
share to be in accordance with the specific provisions of the Nonqualified
Option Agreements as set forth below, and shall be subject to the general terms
and conditions specified in Section 7 hereof.

         6.1 The Nonqualified Stock Options that are to be issued to replace the
Restricted Units noted in Section 4.2 above shall have an exercise price of five
cents ($.05) per share and shall have the same vesting period(s) as provided in
the Restricted Unit Agreements undertaken in connection with the granting of
said Restricted Units to the employees, Directors or a contractor of GX
Technology L.P. as a predecessor entity of the Company.

         6.2 The Nonqualified Stock Options that are to be issued to replace the
Option Units noted in Section 4.2 above shall have an exercise price of five
dollars ($5.00) per share and shall have the same vesting period(s) as provided
in the Employee Unit Purchase Agreements undertaken in connection with the
granting of said Unit Options to the employees and Directors of GX Technology
L.P. as a predecessor entity of the Company.

         7. Terms and Conditions of Options. Each Option shall be evidenced by a
written Option Agreement between the Corporation and the Optionee, which
agreement shall comply with and be subject to the following terms and
conditions:

         7.1 Number of Shares. Each Option Agreement shall state the number of
shares of Common Stock to which the Option relates.

         7.2 Type of Option. Each Option Agreement shall specifically identify
the portion, if any, of the Option which constitutes an Incentive Stock Option
and the portion, if any, which constitutes a Nonqualified Stock Option.





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         7.3 Option Price. Each Option Agreement shall state the Option Price
which, in the case of Incentive Stock Options, shall be not less than 100% of
the Fair Market Value of the shares of Common Stock of the Corporation on the
date of grant of the Option. The Option Price shall be subject to adjustment as
provided in Section 7.9 hereof. The date on which the Committee adopts a
resolution expressly granting an Option shall be considered the day on which
such Option is granted.

         7.4 Medium and Time of Payment. The Option Price shall be paid in full,
at the time of exercise, in cash or in shares of Common Stock having a Fair
Market Value equal to such Option Price or in a combination of cash and such
shares, and may be effected in whole or in part (a) with monies received from
the Corporation at the time of exercise as a compensatory cash payment, or (b)
with monies borrowed from the Corporation pursuant to repayment terms and
conditions as shall be determined from time to time by the Committee, in its
discretion, separately with respect to each exercise of Options and each
Optionee; provided, however, that each such method and time for payment and each
such borrowing and terms and conditions of repayment shall be permitted by and
be in compliance with applicable law, and provided, further, if the Option Price
is paid with monies borrowed from the Corporation, such fact shall be noted
conspicuously on the certificate evidencing such shares in accordance with
applicable law.

         7.5 Term and Exercise of Options. Options shall be exercisable over the
exercise period as and at the times and upon the conditions that the Committee
may determine, as reflected in the Option Agreement; provided, however, that the
Committee shall have the authority to accelerate the exercisability of any
outstanding Option at such time and under such circumstances as it, in its sole
discretion, deems appropriate. The exercise period shall be determined by the
Committee for all Options; provided, however that such exercise period shall not
exceed 10 years from the date of grant of such Option. The exercise period shall
be subject to earlier termination as provided in Sections 7.6 and 7.7 hereof. An
Option may be exercised, as to any or all full shares of Common Stock as to
which the Option has become exercisable, by giving written notice of such
exercise to the Committee; provided, however, that an Option may not be
exercised at any one time as to fewer than 100 shares (or such number of shares
as to which the Option is then exercisable if such number of shares is less than
100).

         7.6 Termination. Except as provided in Section 7.5 and in this Section
7.6 hereof, an Option may not be exercised unless the Optionee is then in the
employ of the Corporation or a division or Subsidiary Corporation (or a
corporation issuing or assuming the Option in a transaction to which IRC Section
424(a) applies), and unless the Optionee has remained continuously so employed
since the date of grant of the Option. If the employment of an Optionee shall
terminate (other than by reason of death, disability or retirement), all Options
of such Optionee that are exercisable at the time of such termination may,
unless earlier terminated in accordance with their terms, be exercised within
three months after such termination; provided, however, that if the employment
of an Optionee shall terminate for cause, all Options theretofore granted to
such Optionee shall, to the extent not theretofore exercised, terminate
forthwith. Nothing in the Plan or in any Option shall confer upon an individual
any right to continue in the employ of the Corporation or any of its divisions
or Subsidiary Corporations or interfere in any way with the right of the
Corporation or any such division or Subsidiary Corporation to terminate such
employment.





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         7.7 Death, Disability, or Retirement. If an Optionee shall die while
employed by the Corporation, or a Subsidiary Corporation thereof, or within
three months after the termination of such Optionee's employment, other than for
cause, or if the Optionee's employment shall terminate by reason of disability
or retirement, all Options theretofore granted to such Optionee (to the extent
otherwise exercisable) may, unless earlier terminated in accordance with their
terms, be exercised by the Optionee or by the Optionee's estate or by a person
who acquired the right to exercise such Option by bequest or inheritance or
otherwise by reason of the death or disability of the Optionee, at any time
within one year after the date of death, disability or retirement of the
Optionee.

         7.8 Nontransferability of Options. Options granted under the Plan shall
not be transferable otherwise than (a) by will; or (b) by the laws of descent
and distribution. Options may be exercised, during the lifetime of the Optionee,
only by the Optionee, his or her guardian, or legal representative.

         7.9 Effect of Certain Changes.

                  (1) If there is any change in the number of shares of Common
         Stock through the declaration of stock dividends, or through
         recapitalization resulting in stock splits, or combinations or
         exchanges of such shares, the number of shares of Common stock
         available for Options, the number of such shares covered by outstanding
         Options and the price per share of such Options shall be
         proportionately adjusted by the Committee to reflect any increase or
         decrease in the number of issued shares of Common Stock; provided,
         however, that any fractional shares resulting from such adjustment
         shall be eliminated.

                  (2) In the event of the proposed dissolution or liquidation of
         the Corporation, in the event of any corporate separation or division,
         including, but not limited to, split-up, split-off or spin-off, or in
         the event of a merger or consolidation of the Corporation with another
         corporation, the Committee may provide that the holder of each Option
         then exercisable shall have the right to exercise such Option (at its
         then Option Price) solely for the kind and amount of shares of stock
         and other securities, property, cash or any combination thereof
         receivable upon such dissolution, liquidation, or corporate separation
         or division, or merger or consolidation by a holder of the number of
         shares of Common Stock for which such Option might have been exercised
         immediately prior to such dissolution, liquidation, or corporate
         separation or division, or merger or consolidation; or the Committee
         may provide, in the alternative, that each Option granted under the
         Plan shall terminate as of a date to be fixed by the Committee;
         provided, however, that not less than 30-days' written notice of the
         date so fixed shall be given to each Optionee, who shall have the
         right, during the period of 30 days preceding such termination, to
         exercise the Options as to all or any part of the shares of Common
         Stock covered thereby, including shares as to which such Options would
         not otherwise be exercisable; provided, further, that failure to
         provide such notice shall not invalidate or affect the action with
         respect to which such notice was required.





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                  (3) If while unexercised Options remain outstanding under the
         Plan, the stockholders of the Corporation approve a definitive
         agreement to merge or consolidate the Corporation with or into another
         corporation or to sell or otherwise dispose of all or substantially all
         of its assets, or adopt a plan of liquidation (each, a "Disposition
         Transaction"), then the Committee may (a) make an appropriate
         adjustment to the number and class of shares available for options, and
         to the amount and kind of shares or other securities or property
         (including cash) receivable upon exercise of any outstanding options
         after the effective date of such transaction, and the price thereof,
         or, in lieu of such adjustment, provide for the cancellation of all
         options outstanding at or prior to the effective date of such
         transaction; (b) provide that exercisability of all Options shall be
         accelerated, whether or not otherwise exercisable; or (c) in its
         discretion, permit Optionees to surrender outstanding options for
         cancellation; provided, however, that if the stockholders approve such
         Disposition Transaction within five years of the date of adoption of
         this Plan and before the Corporation is taken public, the Committee
         shall provide for the alternative in (b) above. Upon any cancellation
         of an outstanding Option pursuant to this Section, the Optionee shall
         be entitled to receive, in exchange therefor, a cash payment under any
         such Option in an amount per share determined by the Committee in its
         sole discretion, but not less than the difference between the per share
         exercise price of such Option and the Fair Market Value of a share of
         the Corporation Common Stock on such date as the Committee shall
         determine.

                  (4) Paragraphs (2) and (3) of this Section 7.9 shall not apply
         to a merger or consolidation in which the Corporation is the surviving
         corporation and shares of Common Stock are not converted into or
         exchanged for stock, securities of any other corporation, cash or any
         other thing of value. Notwithstanding the preceding sentence, in case
         of any consolidation or merger of another corporation into the
         Corporation in which the Corporation is the surviving corporation and
         in which there is a reclassification or change (including a change to
         the right to receive cash or other property) of the shares of Common
         Stock (other than a change in par value, or from par value to no par
         value, or as a result of a subdivision or combination, but including
         any change in such shares into two or more classes or series of
         shares), the Committee may provide that the holder of each Option then
         exercisable shall have the right to exercise such Option solely for the
         kind and amount of shares of stock and other securities (including
         those of any new direct or indirect parent of the Corporation),
         property, cash or any combination thereof receivable upon such
         reclassification, change, consolidation or merger by the holder of the
         number of shares of Common Stock for which such Option might have been
         exercised.

                  (5) In the event of a change in the Common Stock of the
         Corporation as presently constituted which is limited to a change of
         all of its authorized shares with par value into the same number of
         shares with a different par value or without par value, the shares
         resulting from any such change shall be deemed to be the Common Stock
         within the meaning of the Plan.

                  (6) To the extent that the foregoing adjustments relate to
         stock or securities of the Corporation, such adjustments shall be made
         by the Committee, whose determination in that respect shall be final,
         binding and conclusive, provided that each Incentive Stock Option
         granted pursuant to this Plan shall not be adjusted in a manner that
         causes such option to fail to continue to qualify as an Incentive Stock
         Option within the meaning of IRC Section 422.




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                  (7) Except as hereinbefore expressly provided in this Section
         7.9, the Optionee shall have no rights by reason of any subdivision or
         consolidation of shares of stock or any class or the payment of any
         stock dividend or any other increase or decrease in the number of
         shares of stock of any class or by reason of any dissolution,
         liquidation, merger, or consolidation or spin-off of assets or stock of
         another corporation; and any issue by the Corporation of shares of
         stock of any class shall not affect, and no adjustment by reason
         thereof shall be made with respect to, the number or price of shares of
         Common Stock subject to the Option. The grant of an Option pursuant to
         the Plan shall not affect in any way the right or power of the
         Corporation to make adjustments, reclassifications, reorganizations or
         changes of its capital or business structures or to merge or to
         consolidate or to dissolve, liquidate or sell, or transfer all or part
         of its business or assets.

         7.10 Rights as a Shareholder. An Optionee or a transferee of an Option
shall have no rights as a shareholder with respect to any shares covered by the
Option until the date of the issuance of a certificate evidencing such shares.
No adjustment shall be made for dividends (ordinary or extraordinary, whether in
cash, securities or other property) or distribution of other rights for which
the record date is prior to the date such certificate is issued, except as
provided in Section 7.9 hereof.

         7.11 Other Provisions. The Option Agreements authorized under the Plan
shall contain such other provisions, including, without limitation, (a) the
imposition of restrictions upon the exercise of an Option; (b) in the case of an
Incentive Stock Option, the inclusion of any condition not inconsistent with
such Option qualifying as an Incentive Stock Option; and (c) conditions relating
to compliance with applicable federal and state securities laws, as the
Committee shall deem advisable.

         8. Agreement By Optionee Regarding Withholding Taxes. If the Committee
shall so require, as a condition of the exercise, each Optionee shall agree that
(a) no later than the date of exercise of any Option, the Optionee will pay to
the Corporation or make arrangements satisfactory to the Committee regarding
payment of any federal, state or local taxes of any kind required by law to be
withheld upon the exercise of such Options, and (b) the Corporation shall, to
the extent permitted or required by law, have the right to deduct federal, state
and local taxes of any kind required by law to be withheld upon the exercise of
such Option from any payment of any kind otherwise due to the Optionee.

         9. Term of Plan. Options may be granted pursuant to the Plan from time
to time within a period of 10 years from the date the Plan is approved by the
stockholders of the Corporation.

         10. Definitions. As used in this Plan, the following words and phrases
shall have the meanings indicated:

                  (a) "DISABILITY" shall mean an Optionee's inability to engage
         in any substantial gainful activity by reason of any medically
         determinable physical or mental impairment that can be expected to
         result in death or that has lasted or can be expected to last for a
         continuous period of not less than twelve (12) months.





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                  (b) "FAIR MARKET VALUE" per share as of a particular date
         shall mean (i) the closing sales price per share of Common Stock on a
         national securities exchange for the last preceding date on which there
         was a sale of such Common Stock an such exchange; or (ii) if the shares
         of Common Stock are then traded on an over-the-counter market, the
         average of the closing bid and asked prices for the shares of Common
         Stock in such over-the-counter market for the last preceding date on
         which there was a sale of such Common Stock in such market; or (iii) in
         case no reported sale takes place, the average of the closing bid and
         asked prices on the National Association of Securities Dealers'
         Automated Quotations System ("NASDAQ") or any comparable system, or if
         the shares of Common Stock are not listed on NASDAQ or comparable
         system, the closing sale price or, in case no reported sale takes
         place, the average of the closing bid and asked prices, as furnished by
         any member of the National Association of Securities Dealers, Inc.
         selected from time to time by the Corporation for that purpose; or (iv)
         if the shires of Common Stock are not then listed on a national
         securities exchange or traded in an over-the-counter market, such value
         as the Committee in its discretion may determine using reasonable
         valuation methodology, which may include the use of an expert
         professional appraiser(s).

                  (c) "PARENT CORPORATION" shall mean any corporation (other
         than the Corporation) in an unbroken chain of corporations ending with
         the employer corporation if, at the time of granting an Option, each of
         the corporations other than the employer corporation owns stock
         possessing 50% or more of the total combined voting power of all
         classes of stock in one of the other corporations in such chain.

                  (d) "SUBSIDIARY CORPORATION" shall mean any corporation (other
         than the Corporation) in an unbroken chain of corporations beginning
         with the employer corporation if, at the time of granting an Option,
         each of the corporations other than the last corporation in the
         unbroken chain owns stock possessing 50% or more of the total combined
         voting power of all classes of stock in one of the other corporations
         in such chain.

                  (e) "TEN PERCENT STOCKHOLDER" shall mean an Optionee who, at
         the time an Incentive Stock Option is granted, owns stock possessing
         more than 10% of the total combined voting power of all classes of
         stock of the Corporation or of its Parent or Subsidiary Corporations.

         11. Amendment and Termination of the Plan. The Board at any time and
from time to time may suspend, terminate, modify or amend the Plan; provided,
however, that any amendment that would materially increase the aggregate number
of shares of Common Stock as to which Options may be granted under the Plan or
materially increase the benefits accruing to participants under the Plan or
materially modify the requirements as to eligibility for participation in the
Plan shall be subject to the approval of the holders of a majority of the Common
Stock issued and outstanding, except that any such increase or modification that
may result from adjustments authorized by section 7.9 hereof shall not require
such approval. Except as provided in Section 7 hereof, no suspension,
termination, modification or amendment of the Plan may adversely affect any
Option previously granted, unless the written consent of the Optionee is
obtained.




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         12. Approval of Stockholders. The Plan shall take effect upon the
approval of the holders of a majority of the issued and outstanding shares of
Common Stock of the Corporation.

         13. Effect of Headings. The section and subsection headings contained
herein are for convenience only and shall not affect the construction hereof.

Approved by the Written Consent of Sole Shareholder in lieu of Special Meeting
of the Shareholders on October 31, 1994.


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