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                                                                     EXHIBIT 2.4



                              AMENDMENT NUMBER ONE
                                     TO THE
                               PURCHASE AGREEMENT


             Amendment Number One (the "Amendment") to the Purchase Agreement,
dated as of August 13, 1997 (the "Agreement"), among OpTel, Inc., Phonoscope,
Ltd., Phonoscope Management L.C., Lee Cook, Alton Cook and the Lee Cook Family
Trust. Capitalized terms used without definition herein shall have the meanings
provided in the Agreement.

             1. Section 1.3(b) of the Agreement is hereby amended and restated
in its entirety as follows:

             (b) MDU Adjustments. Schedule 1.3(b)(i) sets forth a list of the
         standard labor and materials costs ("Standard Costs") to be used by
         Buyer and the Sellers to estimate the cost of wiring and other upgrades
         required to enable each MDU property (other than the properties listed
         in Schedule 1.3(b)(ii)) to meet the "550 MHz Performance Standard"
         described in Schedule 1.3(b)(i) (the "Upgrade") and Schedule
         1.3(b)(iii) sets forth a list of all MDU locations relating to the
         Business as of the date hereof. On or prior to September 22, 1997, the
         Sellers shall deliver to Buyer a design (a "Redesign") and estimated
         costs (based upon the Standard Costs) for the Upgrade of five of the 25
         MDU locations indicated on Schedule 1.3(b)(iv). On or prior to
         September 29, 1997, the Sellers shall deliver to Buyer a Redesign and
         estimated costs (based upon the Standard Costs) for the Upgrade of ten
         additional of the 25 MDU locations indicated on Schedule 1.3(b)(iv). On
         or prior to October 6, 1997, the Sellers shall deliver to Buyer a
         Redesign and estimated costs (based upon the Standard Costs) for the
         Upgrade of the remaining MDU locations indicated on Schedule
         1.3(b)(iv). The Redesigns (i) wherever possible shall incorporate all
         existing coaxial cables leading from the Conveyed Network to the
         network at the related MDU locations, (ii) shall assume in calculating
         RF signal levels that the Conveyed Network amplifier feeding each
         property will operate at rated output levels and that coaxial cable and
         coupler losses are nominal, (iii) shall set forth clearly, by "before"
         and "after" designs, all changes and shall indicate all cable routes
         and footages, and (iv) shall incorporate the least expensive approach
         consistent with the Approach Priorities (as defined below) necessary to
         meet the 550 MHz Performance Standard at the drop connection of every
         tap/splitter network. For purposes of this Section 1.3(b),


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         the Approach Priorities shall be, in order of preference, (A) changing
         existing passive devices, including taps and splitter networks, to
         utilize all available ports, (B) relocating existing on-premises
         amplifiers, (C) adding additional on-premises amplifiers and, if
         necessary, power supplies, and (D) changing and/or adding new
         underground coaxial cables to reduce signal loss. Buyer may review the
         Redesigns and cost calculations and within five Business Days after
         delivery by the Sellers may deliver to the Seller alternative Redesigns
         and/or cost calculations ("Alternatives"). Unless Buyer so delivers
         such Alternatives to the Sellers, the Redesigns (and associated cost
         calculations) shall be deemed to have been accepted by Buyer. If Buyer
         delivers Alternatives, the parties, within five Business Days, shall
         commence negotiations in good faith to resolve any differences and to
         agree upon a reasonable and appropriate Redesign and associated costs
         prior to the Closing. In addition to the conditions set forth in
         Article 4, the obligations of each party to consummate the transactions
         contemplated by this Agreement at the Closing shall be subject to
         agreement by the parties on the Redesigns (or Alternatives, as the case
         may be). Notwithstanding the delivery of any Alternatives, Buyer may,
         at any time, withdraw any Alternatives and accept the original
         Redesigns proposed by the Sellers. The aggregate of the estimated costs
         relating to the Redesigns (and/or Alternatives, if the parties agree
         upon Alternatives) shall be the "Final Redesign Costs". 80% of the
         Final Redesign Costs for the locations indicated on Schedule 1.3(b)(iv)
         (the "Costed Locations") shall be divided by the number of units in the
         Costed Locations to determine the "Per Unit Adjustment." The Purchase
         Price shall be reduced by an amount equal to the Per Unit Adjustment
         multiplied by the total number of all MDU locations relating to the
         Business (other than the locations listed in Schedule 1.3(b)(ii)).

             2. Schedule 1.3(b)(iv) is amended and restated in its entirety as
set forth in Attachment A hereto.

             3. Section 2(b) of Exhibit G to the Agreement is hereby amended and
restated in its entirety as follows:

             (b) As an accommodation to Phonoscope, the Buyer hereby provides to
         Phonoscope, upon the terms and subject to the conditions set forth
         herein, for a period from the Closing Date until the 180th day after
         the Closing Date (such period, as it may be shortened as provided
         below, the "Term"), access to OpTel's existing "head end" (the
         "Temporary Head End") located at [insert address], without cost to
         Phonoscope except that Phonoscope shall be solely responsible for all
         operating costs, fees, maintenance


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         costs, licensing or permit fees or any other expenses associated with
         Phonoscope's use of the Temporary Head End. After October 13, 1997, and
         prior, and as a condition precedent, to the Closing, Phonoscope shall
         be entitled at reasonable times and upon reasonable advance notice to
         the Buyer, to inspect and test the Temporary Head End to confirm its
         conformity in all material respects with the specifications set forth
         in Exhibit II hereto and that the Temporary Head End is in good
         operating condition. Prior to October 13, 1997, the Buyer shall (i)
         change the channel lineup of the Temporary Head End to match
         Phonoscope's channel lineup (as set forth in a notice delivered by
         Phonoscope to the Buyer no later than September 29, 1997) except that
         pay-per-view services on Channel 1 and 99 will be excluded, (ii) obtain
         and provide any necessary head end equipment to receive and provide
         such programming, (iii) install two-way couplers into all off-air and
         satellite feeds in order to provide signal services from both the
         Buyer's new and existing head-ends and (iv) combine all the head end
         signals and provide a single RF output for Phonoscope's use. Phonoscope
         shall be solely responsible for all connections and attachments to the
         Temporary Head End, including, but not limited to, all fiber
         connections, optical electronics, passives, hardware, labor, splicing,
         amplifiers, couplers, and equipment and connections necessary to
         combine high-speed data services with the head end signals. In
         addition, Phonoscope shall provide a "prevue guide" signal for
         insertion at the Temporary Head End by either providing an RF feed over
         the fiber from Phonoscope's head end site to the Temporary Head End or
         providing satellite receiver and ancillary equipment necessary to
         supply baseband signals into the RF modulators at the Temporary Head
         End for this channel. The parties hereto shall cooperate to coordinate
         an orderly cut over of signals to take place between October 20 and
         October 24, 1997 during such evening or early morning hours as the
         parties may agree. Wherever practicable, the parties will exchange
         authorized VCRS and digicypher cards in order to effect the cutover.
         Not later than October 19, 1997, each of Phonoscope and the Buyer shall
         notify the other of which VCRS and digicypher cards will be exchanged
         as part of the cutover. During the Term, the Buyer shall afford to
         Phonoscope's employees set forth on a list of authorized employees
         delivered to the Buyer prior to the Closing Date (and updated from time
         to time by Phonoscope by delivery of a revised list) reasonable access
         to the Temporary Head End in order to maintain and repair the Temporary
         Head End and the equipment and fibers attached thereto, upon prior
         notice, at such times as Phonoscope may reasonably request, provided,
         that prior to the Closing Date the parties shall agree upon procedures
         for assuring access at any and all


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         times by Phonoscope to the Temporary Head End including during such
         time as the Buyer's premises (at which the Temporary Head End is
         located) is not staffed. Phonoscope shall obtain and maintain all
         consents, permits, licenses (including programming licenses and
         authorizations for VCRS and digicypher cards) and approvals necessary
         for the operation of the Temporary Head End and shall operate the
         Temporary Head End in accordance with all applicable laws and
         regulations. If Phonoscope fails to comply in any material respect with
         any term or condition set forth in this Section 2(b), the Buyer, after
         delivery to Phonoscope of written notice of such non-compliance and
         Phonoscope's failure to cure such non-compliance within five Business
         Days after receipt of such notice, may terminate the Term and
         Phonoscope's rights under this Section 2(b). In addition, Phonoscope
         may terminate the Term upon 10 Business Days' written notice to the
         Buyer. The Buyer and its affiliates shall have no obligation or
         liability whatsoever to Phonoscope, its subscribers or any other Person
         for any interruption of service or programming (or the content or
         quality of any signal or programming) resulting from the use of the
         Temporary Head End, provided such interruption is not the result of the
         gross negligence of the Buyer. Aside from conformity to the
         specifications set forth in Exhibit I, the Buyer makes no
         representation and warranty as to the Temporary Head End. As promptly
         as practical after the end of the Term, Phonoscope shall disconnect any
         lines, cables, fibers and equipment ("Attached Equipment") from the
         Temporary Head End and shall remove the Attached Equipment from the
         vicinity of the Temporary Head End, and upon Phonoscope's failure to do
         so and the Buyer's delivery to Phonoscope of written notice of
         Phonoscope's failure to remove the Attached Equipment, within five
         Business Days after receipt of such notice, the Buyer may do so (and
         may retain or dispose of such Attached Equipment in any manner at its
         sole discretion) without any liability to Phonoscope. In its removal of
         the Attached Equipment, Phonoscope shall assure that the Temporary Head
         End is left in its condition on the date hereof, ordinary wear and tear
         excepted.

             4. Section 2(c) of Exhibit G to the Agreement is hereby amended and
restated in its entirety as follows:

             (c) The Buyer shall not be liable for any Losses suffered by
         Phonoscope in connection with its use of the Buyer's Temporary Head
         End, and each Seller, jointly and severally, shall indemnify, defend
         and hold harmless the Buyer from and against all Losses incurred by the
         Buyer in connection with the Buyer's permitting Phonoscope to use the



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         Temporary Head End, except where such Losses result solely from an act
         of gross negligence or willful misconduct by the Buyer.

             5. Exhibit I to Exhibit G to the Agreement is hereby deleted.

             6. This Amendment shall not constitute a waiver or amendment of any
other provision of the Agreement not referred to herein. Except as amended
hereby, the provisions of the Agreement are and shall remain in full force and
effect.

             7. This Amendment may be executed in counterparts, and all such
counterparts taken together shall be deemed to constitute one and the same
instrument.

             8. This Amendment shall be governed by, and construed and
interpreted in accordance with, the laws of the State of Texas.

             IN WITNESS WHEREOF, the parties hereto have caused this Amendment
to be executed on this day of September, 1997.




                                    OPTEL, INC.


                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:


                                    PHONOSCOPE, LTD.


                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:


                                    PHONOSCOPE MANAGEMENT L.C.


                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:


                                    
                                    --------------------------------------------
                                    Lee Cook





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                                    LEE COOK FAMILY TRUST


                                    By: 
                                       -----------------------------------------
                                       Lee Cook
                                       Sole Trustee

                                    
                                    --------------------------------------------
                                    Alton Cook


                                    COMMUNICATIONS EQUITY ASSOCIATES


                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:



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