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                                                                   EXHIBIT 10.11

                            PURCHASE & SALE AGREEMENT

THIS PURCHASE AND SALE AGREEMENT ("Agreement") is entered into as of the 3rd day
of August, 2001 ("Effective Date") between Nortel Networks Inc., a Delaware
corporation with offices located at 5555 Windward Parkway, Suite B, Alpharetta,
GA 30004 ("Nortel") and Arris Interactive L.L.C., a Delaware limited liability
company with offices located at 3871 Lakefield Drive, Suite 300, Suwanee, GA
("Purchaser").

DEFINITIONS

Arris Hardware means the hardware in finished goods or module/spares form,
identified with the initial PEC code letters ARCS and NTBN in Exhibit A,
manufactured by Nortel, either itself or through the use of contract
manufacturers, which is used exclusively in Purchaser's products.

Common Equipment Hardware means the hardware in module/spares form, identified
with the initial PEC code letters/numbers NT4K, as listed in Exhibit B,
manufactured by Nortel, either itself or through the use of contract
manufacturers, which is used in Nortel's Access Node products and in Purchaser's
products and which Nortel is ceasing to manufacture, as described in Section 1.1
below.

Confidential Information means information disclosed by Purchaser or Nortel to
the other party that is designated at the time of disclosure as confidential (or
like designation), is disclosed in circumstances of confidence, or would be
understood by Purchaser and Nortel, exercising reasonable business judgment, to
be confidential.

Delivery Date means the mutually agreed date set out on a PO for delivery of the
Products ordered in the PO.

Proprietary Hardware means the hardware in module/spares form, identified with
the initial PEC code letters/numbers NT7E and A037 under the heading
Modules/Spares in Exhibit A, manufactured by Nortel, either itself or through
the use of contract manufacturers, which is used in certain Nortel products and
in Arris Hardware.

Products means the Arris Hardware, the Common Equipment Hardware and the
Proprietary Hardware.

Prices means the prices for the Products, Supply Chain Components (defined
below), Software Services (defined below), Repair Services and technical
assistance determined in accordance with this Agreement.

Purchase Order or PO means any order issued by Purchaser under this Agreement
for the purchase of Products, Supply Chain Components, Software Services or
Repair Services.

Repair Services means the Product repair services described in Section 10.

Specifications means the published specifications for the Products.

1.       SCOPE

         1.1      Under the terms of this Agreement Nortel will sell to
                  Purchaser Common Equipment Hardware and provide Repair
                  Services and technical assistance for the Common Equipment
                  Hardware. The parties acknowledge and agree that Nortel has
                  announced that it is discontinuing the manufacture of the
                  Common Equipment Hardware. Therefore, Purchaser shall place
                  with Nortel Purchaser's final orders for Purchaser's
                  requirements for Common Equipment Hardware by no later than
                  September 30, 2001 for delivery to Purchaser no later than May
                  31, 2002 ("Common Equipment Last Time Buy"). Repair Services
                  and technical assistance for the Common Equipment Hardware
                  will be offered by Nortel to Purchaser until May 31, 2007
                  ("Common Equipment Support Period"). Notwithstanding the
                  preceding sentence, Nortel may elect to outsource the
                  providing of Repair Services and/or technical support for the
                  Common Equipment Hardware and require Purchaser to purchase
                  such Repair Services and/or technical support directly from
                  the outsource company on terms and conditions to be agreed to
                  between Purchaser and the outsource company. In the event of
                  such outsourcing, Nortel shall be relieved of its obligation
                  to provide Repair Services and/or technical support, as
                  applicable, for the Common Equipment Hardware for the
                  remaining portion of the Common Equipment Support Period.

         1.2      Under the terms of this Agreement Nortel will sell to
                  Purchaser Arris Hardware and duplicate, load and test the

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                  Arris software on the Arris Hardware ("Software Services") and
                  provide Repair Services for the Arris Hardware until the
                  manufacture of the Arris Hardware and the performance of
                  Software Services and Repair Services for the Arris are
                  directly assumed by Purchaser or by contract manufacturers
                  with which Purchaser directly contracts for such
                  manufacturing, Software Services and/or Repair Services (the
                  "Transition"), subject to Section 1.2.1 and Section 1.3. The
                  parties agree that the Transition will be completed as soon as
                  practicable following the Effective Date but in no event later
                  than December 31, 2001.

                  1.2.1    Notwithstanding Section 1.2, Purchaser and Nortel
                           Networks acknowledge and agree that the Arris
                           Hardware listed under the headings HDT's or DMC's in
                           Exhibit A may incorporate Proprietary Hardware and/or
                           Common Equipment Hardware modules. As a result of the
                           Transition, Purchaser is obtaining no rights to
                           manufacture such Proprietary Hardware modules and/or
                           Common Equipment Hardware modules and Purchaser shall
                           continue to purchase such Proprietary Hardware
                           modules and Common Equipment Hardware modules from
                           Nortel Networks pursuant to Section 1.6 below and
                           Section 1.1 above, respectively, for incorporation
                           into the HDT and DMC Arris Hardware manufactured by
                           Purchaser after the Transition is completed. The
                           extent to which Arris may undertake the manufacture
                           of Proprietary Hardware and/or Common Equipment
                           Hardware is defined in that certain Intellectual
                           Property Rights Agreement between Purchaser and
                           Nortel Networks Limited, dated as of the Effective
                           Date.

                  1.2.2    As part of the Transition Purchaser shall discontinue
                           the use of Nortel logos and Nortel part numbers for
                           the Arris Hardware and the components, assemblies and
                           subassemblies of the Arris Hardware, except in
                           connection with the existing inventory of such Arris
                           Hardware including the Supply Chain Components and
                           except for existing references to Nortel part numbers
                           embedded in the system software for Purchaser's
                           products but not visible to customers. Also, as part
                           of the Transition Purchaser shall move its design
                           documentation for the Products from Nortel's DDMEZ
                           database to Purchaser's own database. Also as part of
                           the Transition Purchaser shall assume responsibility
                           for the reproduction of the Arris-products-specific
                           documentation listed in Exhibit A for the Arris
                           Hardware.

         1.3      The parties acknowledge and agree that as of the Effective
                  Date Nortel has an inventory of Arris Hardware or Proprietary
                  Hardware in finished goods and/or module/spares form in the
                  approximate quantities listed in Exhibit A ("Finished Goods
                  Inventory"). If on the date the Transition is completed Arris
                  has not purchased the Finished Goods Inventory in its
                  entirety, under the terms of this Agreement Purchaser agrees
                  that from time to time, as Purchaser has requirements for such
                  Arris Hardware or Proprietary Hardware constituting the
                  Finished Goods Inventory, Purchaser shall purchase such
                  requirements from the Finished Goods Inventory remaining after
                  completion of the Transition until the entirety of the
                  Finished Goods Inventory is purchased by Purchaser or Nortel,
                  in its sole discretion, sells or otherwise disposes of the
                  remaining portion of the Finished Goods Inventory. Such
                  purchases of the Finished Goods Inventory shall be made by
                  Purchaser before any new units of the same Arris Hardware
                  constituting the Finished Goods Inventory are manufactured by
                  Purchaser or its contract manufacturers after completion of
                  the Transition.

         1.4      The parties acknowledge and agree that as of the Effective
                  Date Nortel and Nortel's contract manufacturers who
                  manufacture Arris Hardware or modules thereof for Nortel have
                  quantities of components and subassemblies purchased or
                  assembled for use in the manufacture of Arris Hardware or
                  modules thereof in the quantities identified in Exhibit C
                  ("Supply Chain Components"). To the extent that, on the date
                  the Transition is completed, the Supply Chain Components have
                  not be fully used in the manufacture of Arris Hardware
                  purchased hereunder prior to completion of the Transition,
                  Purchaser agrees from time to time as Purchaser has
                  requirements to manufacture Arris Hardware after completion of
                  the Transition to purchase the Supply Chain Components itself
                  or to cause its contract manufacturers to purchase the Supply
                  Chain Components in the quantities needed for the manufacture
                  of Purchaser's requirements of Arris Hardware until the
                  entirety of such Supply Chain Components is purchased by
                  Purchaser or its contract manufacturers for such purpose or
                  Nortel, in its sole discretion, sells or otherwise disposes of
                  the remaining portion of such Supply Chain Components. Such
                  purchases of the Supply Chain Components shall be made by
                  Purchaser and its contract manufacturers before any new
                  components of the same kind are purchased by Purchaser and its
                  contract manufacturers for use in manufacturing Arris Hardware
                  after completion of the Transition.

         1.5      Until all of the Finished Goods Inventory has been purchased
                  by Purchaser or sold or otherwise disposed of by Nortel, as
                  described in Section 1.3, and until all the Supply Chain
                  Components have been purchased by

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                  Purchaser or its contract manufacturers or sold or otherwise
                  disposed of by Nortel, as described in Section 1.4, Purchaser
                  shall provide to Nortel on a monthly basis (i) a written
                  rolling twelve month non-binding forecast of Purchaser's
                  expected requirements for new Arris Hardware; (ii) copies of
                  all purchase orders placed by Purchaser during the prior month
                  on Purchaser's contract manufacturers for the purchase of new
                  Arris Hardware.

         1.6      Under the terms of this Agreement Nortel will sell to
                  Purchaser Proprietary Hardware and provide Repair Services and
                  technical assistance for the Proprietary Hardware until
                  Purchaser discontinues the manufacture of those products of
                  Purchaser which, as of the Effective Date, incorporate the
                  Proprietary Hardware ("Proprietary Hardware End Date").

                  1.6.1    Notwithstanding Section 1.6, Nortel may elect to
                           outsource the manufacture of the Proprietary Hardware
                           and/or the providing of Repair Services and/or
                           technical support for the Proprietary Hardware and
                           require Purchaser to purchase the Proprietary
                           Hardware and/or such Repair Services and/or technical
                           support directly from the outsource company on terms
                           and conditions to be agreed to between Purchaser and
                           the outsource company. In the event of such
                           outsourcing, Nortel will be relieved of any further
                           obligation to manufacture and sell the Proprietary
                           Hardware to Purchaser or to provide Repair Services
                           and/or technical support for the Proprietary
                           Hardware, as applicable.

                  1.6.2    Notwithstanding Section 1.6, Nortel may elect to
                           discontinue the manufacture of the Proprietary
                           Hardware and in such event Nortel will offer to
                           Purchaser the opportunity to make a last time buy of
                           the Proprietary Hardware ("Proprietary Hardware Last
                           Time Buy") and to obtain Repair Services and
                           technical support for the Proprietary Hardware for a
                           defined support period on the same basis as Nortel
                           announces to its other customers for the Proprietary
                           Hardware ("Proprietary Hardware Support Period"). In
                           the event of such discontinuance of the manufacture
                           of the Proprietary Hardware, Nortel will be relieved
                           of (i) any further obligation to manufacture and sell
                           the Proprietary Hardware to Purchaser other than the
                           Proprietary Hardware Last Time Buy; and (ii) to
                           provide Repair Services and/or technical support for
                           the Proprietary Hardware beyond the Proprietary
                           Hardware Support Period. Nortel's right to outsource
                           Repair Services and/or technical support for the
                           Proprietary Hardware, as provided above, shall also
                           apply during the Proprietary Hardware Support Period.

2.       TERM  This Agreement shall become effective on the Effective Date and
         shall continue thereafter (a) with respect to the Common Equipment
         Hardware until all the obligation under Section 1.1 have been
         completed; (b) with respect to the Arris Hardware until all the
         obligations under Sections 1.2, 1.2.1, 1.2.2, 1.3, 1.4 and 1.5 have
         been completed; and (c) with respect to the Proprietary Hardware until
         all the obligations under Sections 1.6, 1.6.1 and 1.6.2 have been
         completed.

3.       GRANT OF RIGHTS

         3.1      Nortel grants to Purchaser the non-exclusive, non-transferable
                  worldwide right to distribute and sell the Products
                  incorporated into Cornerstone products manufactured and sold
                  by Purchaser as of the Effective Date. Purchaser is not
                  permitted to purchase the Products for any other purpose or
                  use.

         3.2      With respect to the software or firmware contained in the
                  Common Equipment Hardware and the Proprietary Hardware
                  (collectively "Firmware"), Nortel grants to Purchaser a
                  non-exclusive, non-transferable worldwide right and license
                  to: (i) use the source code version of the Firmware internally
                  within Purchaser to modify the Firmware and create derivative
                  works from the Firmware (collectively "Enhancements"); (ii) to
                  make copies of the Firmware and the Enhancements in
                  machine-readable form for use on the Common Equipment Hardware
                  and/or the Proprietary Hardware; and (iii) to sublicense
                  machine-readable copies of the Firmware and the Enhancements
                  to Purchaser's direct or indirect end-user customers for use
                  on the Common Equipment Hardware or Proprietary Hardware
                  pursuant to the same license terms that Purchaser uses to
                  license the software portions of Purchaser's products to
                  end-user customers ("End-User Sublicenses"). Title and
                  ownership of the Firmware is and shall remain in Nortel or its
                  suppliers. Purchaser shall not rent, lease, license or
                  otherwise transfer the Firmware or the Enhancements except for
                  the granting of End-User Sublicenses.

4.       ORDERING

         4.1      Purchaser will use Purchase Orders to purchase Products,
                  Supply Chain Components, Software Services and

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                  Repair Services under this Agreement. Purchase Orders for
                  Common Equipment Hardware shall be placed by Purchaser no
                  later than September 30, 2001.

         4.2      This Agreement will be the sole terms and conditions governing
                  Purchase Orders for Products, Supply Chain Components,
                  Software Services and Repair Services and Nortel's
                  acknowledgment of them. Terms and conditions on any Purchase
                  Order or acknowledgement shall be invalid to the extent they
                  conflict with or are in addition to the terms and conditions
                  of this Agreement.

         4.3      Nortel will accept Purchase Orders for Products, Supply Chain
                  Components, Software Services and Repair Services issued by
                  Purchaser, if the POs comply with this Agreement. Nortel will
                  acknowledge acceptance of POs for Products, Supply Chain
                  Components, Software Services or Repair Services in writing
                  within 2 business days of its receipt of each PO. Nortel may
                  reject any PO that does not comply with the requirements of
                  this Agreement, including without limitation, a PO that
                  specifies a Delivery Date that has not been agreed to by
                  Nortel pursuant to Section 5.1.

         4.4      On the first business day of each month until the Transition
                  is completed, Purchaser shall provide Nortel with a revised
                  forecast of its requirements for Arris Hardware ("Arris
                  Hardware Forecast") up to the most current estimated date for
                  completion of the Transition. Each Arris Hardware Forecast
                  shall be binding on Purchaser and Purchaser shall be obligated
                  to purchase all Arris Hardware so forecasted.

         4.5      On the first business day of each month so long as Purchaser
                  is purchasing Proprietary Hardware under this Agreement,
                  Purchaser shall provide Nortel with a revised 12 month rolling
                  forecast of its requirements for Proprietary Hardware
                  ("Proprietary Hardware Forecast"). Each Proprietary Hardware
                  Forecast shall be non-binding on Purchaser and is for planning
                  purposes only.

5.       DELIVERY

         5.1      Delivery Date  The Delivery Dates for Products ordered will be
                  no more than eight (8) weeks after receipt of a Purchase
                  Order, provided that the Delivery Dates for all orders for
                  Common Equipment Hardware shall be on or before May 31, 2002
                  and the Delivery Dates for all orders for Proprietary Hardware
                  shall be on or before the earliest to occur of (i) the
                  Proprietary Hardware End Date; (ii) the date Nortel outsources
                  the manufacture of the Proprietary Hardware; or (iii) the last
                  delivery date established by Nortel pursuant to the
                  Proprietary Hardware Last Time Buy. Delivery Dates for the
                  Products and Supply Chain Components in each PO shall be
                  mutually agreed to by Purchaser and Nortel prior to
                  Purchaser's issuance of the PO.

         5.2      Delivery Delay  Nortel will notify Purchaser of any
                  anticipated delay in meeting the Delivery Date in a PO and
                  will provide Purchaser with a new Delivery Date.

         5.3      Rescheduling a Delivery Date  Subject to the limitations set
                  out below in this Section 5.3, Purchaser may reschedule the
                  original Delivery Date for Products in a PO once to a date up
                  to 90 business days later. At the end of the 90 business days,
                  unless otherwise mutually agreed by the parties, Purchaser
                  will take delivery of the Products in the Purchase Order.
                  Delivery Dates for orders for Arris Hardware which have a
                  delivery date prior to completion of the Transition may not be
                  rescheduled beyond the date of completion of the Transition.
                  Delivery Dates for orders for Common Equipment Hardware may
                  not be rescheduled beyond May 31, 2002. Delivery Dates for
                  orders for Proprietary Hardware may not be rescheduled beyond
                  the earliest to occur of (i) the Proprietary Hardware End
                  Date; (ii) the date Nortel outsources the manufacture of the
                  Proprietary Hardware; or (iii) the last delivery date
                  established by Nortel pursuant to the Proprietary Hardware
                  Last Time Buy.

6.       PRICES AND PAYMENTS

         6.1      Prices  The Prices of Common Equipment Hardware shall be equal
                  to Nortel's current cost plus a margin of 5%, as set out in
                  Exhibit B. For Arris Hardware ordered for delivery before
                  December 31, 2001, the Prices shall be equal to Nortel's
                  current cost plus a margin of 5%, as set out in Exhibit A.
                  Thereafter, the Prices of Arris Hardware shall be equal to (a)
                  Nortel's cost at the time of order plus a margin of 5%, if
                  delivery is requested within 60 days following the order date;
                  or (b) Nortel's cost at the time of delivery plus a margin of
                  5%, if delivery is requested more than 60 days following the
                  order date. For Proprietary Hardware ordered for delivery
                  before December 31, 2001, the Prices shall be equal to
                  Nortel's current cost plus a margin of 5%, as set out in

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                  Exhibit A. Thereafter, the Prices of Proprietary Hardware
                  shall be market prices as established by Nortel from time to
                  time. The Prices of Supply Chain Components shall be equal to
                  (a) Nortel's cost at the time of order plus a margin of 5%, if
                  delivery is requested within 60 days following the order date;
                  or (b) Nortel's cost at the time of delivery plus a margin of
                  5%, if delivery is requested more than 60 days following the
                  order date. The Prices for Software Services are set out in
                  Exhibit D. All Prices are in United States dollars. Prices of
                  Products and Supply Chain Components are FOB Nortel's shipping
                  location. Product Prices include packing costs. Supply Chair
                  Component Prices do not include packing costs and such packing
                  costs shall be separately charged to and paid by Purchaser.
                  Prices do not include applicable taxes, import duties, customs
                  charges and shipping charges.

         6.2      Taxes, Duties and Shipping Charges  Purchaser will be
                  responsible for all applicable taxes, import duties and
                  customs charges payable with respect to the Products, Supply
                  Chain Components, Software Services, Repair Services and
                  technical assistance, and for all shipping charges for
                  shipping Products and Supply Chain Components from Nortel's
                  factory or other point of shipment to Purchaser's delivery
                  location.

         6.3      Payment  Nortel will invoice Purchaser at Purchaser's address
                  at 3871 Lakefield Drive, Suite 300, Suwanee, GA 30024.
                  Purchaser will pay Nortel the amount of each Nortel invoice
                  within 30 days of its receipt of invoice.

         6.4      Audit Rights  Purchaser may, at Purchaser's expense, by means
                  of an outside accounting firm reasonably acceptable to Nortel,
                  audit the records of Nortel to confirm that the Prices charged
                  to Purchaser for Products and/or Supply Chain Components which
                  are based on Nortel's applicable cost, as provided in Section
                  6.1 are correctly calculated by Nortel. The accounting firm
                  must execute with Nortel a non-disclosure agreement in a form
                  acceptable to Nortel before undertaking any such audit. The
                  accounting firm will provide Purchaser and Nortel with a
                  written report of the audit results, indicating whether the
                  Prices of Products and/or Supply Chain Components are in
                  compliance with this Agreement or whether the Prices have been
                  overstated or understated. If any Prices have been overstated
                  or understated, Nortel will either invoice Purchaser for the
                  understated amount or credit the overstated amount against
                  future purchases by Purchaser.

7.       TITLE AND RISK OF LOSS   Title and risk of loss to the Products, any
         warranty replacement Products and Supply Chain Components shall pass to
         Purchaser upon shipment by Nortel to Purchaser from the manufacturing
         facility or other point of shipment.

8.       ACCEPTANCE OR REJECTION OF PRODUCTS

         8.1      Products shall be deemed accepted by Purchaser upon delivery
                  (the "Product Acceptance Date") unless Purchaser gives Nortel
                  notice of rejection within 10 business days after delivery.

         8.2      If Purchaser rejects the Products in an order, as set out in
                  Section 8.1, Purchaser shall give Nortel a detailed notice
                  describing the nonconformity, and upon receipt of an RMA
                  (defined below) return them at Purchaser's expense and risk.
                  Upon confirmation of the nonconformity Nortel will repair or
                  replace the nonconforming Products and deliver them at
                  Nortel's expense and risk back to Purchaser within 30 days of
                  original receipt.

         8.3      Supply Chain Components shall be deemed accepted by Purchaser
                  upon delivery (the "Component Acceptance Date") unless
                  Purchaser gives Nortel notice of rejection within 10 business
                  days after delivery.

         8.4      If Purchaser rejects the Supply Chain Components in an order,
                  as set out in Section 8.3, Purchaser shall give Nortel a
                  detailed notice describing the nonconformity, and upon receipt
                  of an RMA (defined below) return them at Purchaser's expense
                  and risk. Upon confirmation of the nonconformity Nortel will,
                  to the extent available from Nortel's remaining inventory of
                  Supply Chain Components, replace the nonconforming Supply
                  Chain Components and deliver them at Purchaser's expense and
                  risk back to Purchaser within 30 days of original receipt. To
                  the extent the nonconforming Supply Chain Components cannot be
                  replaced from Nortel's remaining inventory of Supply Chain
                  Components, the order will be deemed cancelled and Nortel will
                  have no further liability with respect to such cancelled
                  order.

9.       WARRANTY

         9.1      Nortel warrants that, for 12 months from the Product
                  Acceptance Date (the "Product Warranty Period"), the Products
                  will be free from defects in materials and workmanship and
                  will conform to the Specifications.

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         9.2      The warranties in Section 9.1 do not cover (i) items normally
                  consumed in operation (e.g., lamps and fuses); (ii) defects
                  caused by mishandling, misuse, neglect or improper testing,
                  installation, use or repair by Purchaser or its customers;
                  (iii) alterations or modifications not in accordance with
                  Nortel's written instructions; (iv) defects caused by use with
                  another vendor's products; and (v) damage due to fire,
                  explosion, power irregularities or surges, acts of God,
                  including without limitation, earthquakes, rains, floods, or
                  lightning, or any other causes not attributable to Nortel.

         9.3      During the Product Warranty Period, at its expense Nortel
                  will, as its sole liability and Purchase's sole remedy for a
                  breach of the warranties in Section 9.1, repair or replace any
                  nonconfirming Products of which Nortel is notified during the
                  Product Warranty Period. Repair parts or replacement Products
                  may be new or refurbished like new at Nortel's option. For
                  warranty repair or replacement, Purchaser is responsible at
                  Purchaser's expense and risk of damage during shipment for
                  returning defective Products to Nortel. Repaired or
                  replacement Products will be shipped by Nortel to Purchaser at
                  Nortel's expense and risk of damage during shipment.
                  Notwithstanding the foregoing, once the Transition is
                  completed all warranty repairs or replacements of Arris
                  Hardware (including Finished Goods Inventory) will be
                  performed by Purchaser at Purchaser's expense.

         9.4      The Supply Chain Components are sold to Purchaser on an AS IS
                  basis without any warranty except that, to the extent that
                  Nortel's contract manufacturers transfer the Supply Chain
                  Components to Nortel with a warranty, Nortel will assign such
                  warranty to Purchaser to the extent of Nortel's right to do
                  so.

         9.5      EXCEPT FOR THE EXPRESS WARRANTY IN SECTION 9.1, NORTEL
                  DISCLAIMS ALL WARRANTIES WITH RESPECT TO THE PRODUCTS, THE
                  SUPPLY CHAIN COMPONENTS AND SERVICES FURNISHED UNDER THIS
                  AGREEMENT, INCLUDING, WITHOUT LIMITATION, ALL IMPLIED
                  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                  PURPOSE.

10.      REPAIR SERVICES  The following additional terms shall apply to warranty
         repairs of Products and the repair of malfunctioning Products after
         expiration of the Product Warranty Period.

         10.1     Prior to returning any defective Products to Nortel's repair
                  location, Purchaser will notify Nortel orally of the defect,
                  if known at that time, and will request authorization from
                  Nortel for the return of such Products. Upon such request,
                  Nortel shall provide Purchaser with a Return Material
                  Authorization ("RMA") number to be prominently displayed on
                  the shipping container for the defective Products and advise
                  Purchaser of the repair location to which the Products should
                  be returned.

         10.2     Purchaser shall then ship such Products to Nortel, freight
                  prepaid and properly insured. Purchaser will bear the cost of
                  shipment of the malfunctioning Products to Nortel's repair
                  location and the risk of damage during shipment. Purchaser
                  shall prepare proper export documentation as per Nortel's
                  instructions, evidencing Purchaser's ownership of the Products
                  and shall comply with the applicable free trade requirements.

         10.3     Purchaser shall furnish the following information with
                  Products returned to Nortel for Repair Services:
                  (a)      Purchaser's name and complete address;
                  (b)      quantities and model numbers of Products being
                           delivered for repair;
                  (c)      the nature of the defect or failure, if known;
                  (d)      Purchase Order number under which repairs are to be
                           made, if Product is no longer under warranty;
                  (e)      names and telephone numbers of Purchaser's employees
                           or other designated persons to contact in case of
                           questions about the Products;
                  (f)      ship-to address of Purchaser's location to which
                           repaired or replacement Products should be returned;
                           and
                  (g)      whether or not returned Products are under warranty.

         10.4     Nortel will repair or replace malfunctioning Products returned
                  by Purchaser in accordance with this Section 10. Repair parts
                  or replacement Products may be new or refurbished like new, at
                  Nortel's option. The repaired or replacement Products will be
                  returned by Nortel to Purchaser at Nortel's expense and risk
                  of damage during shipment. Such Repair Services for Products
                  outside the Product Warranty Period will be provide by Nortel
                  at the Prices described in Exhibit D. Repair or replacement
                  will be completed by Nortel within 30 days from receipt of the
                  malfunctioning Products. Nortel will inform Purchaser if
                  particular units of Products are not repairable. On a periodic
                  basis Nortel will provide to Purchaser a repair report for
                  repaired or replaced Common

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                  Equipment Hardware or Proprietary Hardware which report will
                  identify the repair actions taken or that a replacement unit
                  was provided.

         10.5     No Repair Services will be provided by Nortel for Arris
                  Hardware after completion of the Transition. No Repair
                  Services will be provided by Nortel for Common Equipment
                  Hardware after the earlier to occur of (i) the date Nortel
                  outsources such Repair Services; or (ii) the end of the Common
                  Equipment Support Period. No Repair Services will be provided
                  by Nortel for Proprietary Hardware after the earliest to occur
                  of (i) the Proprietary Hardware End Date; (ii) the date Nortel
                  outsources such Repair Services; or (iii) the end of the
                  Proprietary Hardware Support Period.

11.      TECHNICAL ASSISTANCE  Nortel will provide its standard technical
         assistance relating to the Common Equipment Hardware during the Product
         Warranty Period at no charge. After the Product Warranty Period, Nortel
         will provide technical assistance relating to the Common Equipment
         Hardware at the Prices set out in Exhibit D. No technical assistance
         will be provided by Nortel for Common Equipment Hardware after the
         earlier to occur of (i) the date Nortel outsources such technical
         support; or (ii) the end of the Common Equipment Support Period. No
         technical assistance will be provided by Nortel for Proprietary
         Hardware after the earliest to occur of (i) the Proprietary Hardware
         End Date; (ii) the date Nortel outsources such technical support; or
         (iii) the end of the Proprietary Hardware Support Period. No technical
         assistance will be provided by Nortel for Arris Hardware.

12.      CONFIDENTIAL INFORMATION  Each party will use reasonable care in
         holding the other's Confidential Information in confidence and not
         disclosing it to anyone except the party's employees on a need-to-know
         basis.

         12.1     Exceptions  Information is not protected if (i) a recipient
                  can demonstrate through written documentation that it was
                  already known to recipient without similar confidentiality
                  obligations; (ii) it becomes known or generally available to
                  the public (other than by act of the recipient) after its
                  disclosure; (iii) it is disclosed or made available in writing
                  to the recipient by a third party having a bona fide right to
                  do so and without similar confidentiality obligations; (iv) it
                  is independently developed by recipient as demonstrated by its
                  business records; or (v) it is required to be disclosed by
                  subpoena or other process of law. The recipient will notify
                  the disclosing party promptly of a subpoena or other process
                  of law requiring disclosure.

         12.2     Ownership, Use and Return  Confidential Information of the
                  disclosing party is and shall remain the exclusive property of
                  the disclosing party. The receiving party shall use the
                  disclosing party's Confidential Information solely in
                  furtherance of this Agreement or as authorized by the
                  disclosing party in writing, and for no other purpose. The
                  receiving party shall return or destroy (and certify such
                  destruction in writing to the disclosing party) the
                  Confidential Information of the disclosing party upon the
                  earlier of (i) the request of the disclosing party, or (ii)
                  the expiration or termination of this Agreement.

13.      LIMITATION OF LIABILITY  Except for claims arising from (i) either
         Party's breach of Section 12; (ii) bodily injury or death caused by
         either party; and (iii) Purchaser's breach of Nortel's intellectual
         property rights, (a) Nortel's liability under this Agreement shall not
         exceed $500,000; and (b) neither party shall be liable for indirect,
         incidental, special, punitive or consequential damages under this
         Agreement.

14.      FORCE MAJEURE  Neither party will be in breach of this Agreement for
         delays or failures of performance due to causes beyond its reasonable
         control ("Force Majeure Event"). The party whose performance is
         affected by a Force Majeure Event shall notify the other party within
         10 days after the occurrence of such Force Majeure Event. If a Force
         Majeure Event lasts 60 calendar days or longer, Purchaser may cancel
         any Purchase Order affected by the Force Majeure Event. The
         cancellation will be without obligation or liability.

15.      TERMINATION AND CONTINUATION OF RIGHTS

         15.1     The affected party is obliged to promptly give notice to the
                  other party, if the affected party:
                  (a)      files or has filed against it a petition in
                           bankruptcy, or
                  (b)      makes an assignment for the benefit of creditors; or,
                  (c)      makes a general settlement of debts or debt
                           reorganization, or
                  (d)      is dissolved or ceases doing business; or
                  (e)      has a substantial part of its assets seized; or
                  (f)      goes into receivership or insolvency proceedings; or

                                     Pg. 7

<PAGE>   8

                  (g)      assigns this Agreement or any part thereof in
                           violation of Section 18.2.

         15.2     The other party may by written notice to the affected party,
                  terminate this Agreement if any of the following occurs: (i)
                  the event described in Section 15.1 subpart (a) and there has
                  been no resolution after 20 days have passed since service of
                  process; or (ii) any of the events described in Section 15.1
                  subparts (b), (c), (d), (e), (f), or (g).

         15.3     If a party breaches this Agreement, it will have 30 days from
                  receipt of written notice from the other party to remedy the
                  breach. If the breach is not remedied in that time period, the
                  notifying party may terminate this Agreement or any
                  uncompleted Purchase Order.

         15.4     The termination rights in Sections 15.2 and 15.3 are in
                  addition to, and not in lieu of, any other rights of the
                  terminating party at law or equity, except as limited
                  elsewhere in this Agreement.

         15.5     All obligations and liabilities intended to survive the
                  termination of this Agreement will be effective after
                  termination.

16.      NOTICES  Notices shall be given by (i) certified mail, return receipt
         requested; or (ii) receipted overnight courier service. Certified mail
         notice is effective on the date shown on the return receipt card and
         overnight courier notice is effective on the next business day after
         sending. A party will send notice to the mailing addresses described
         below or such other address as a party may specify by notice hereunder.

         PURCHASER:                Arris Interactive L.L.C.
                                   3871 Lakefield Drive
                                   Suite 300
                                   Suwanee, GA 30024
                                   Attention:  President

         NORTEL:                   Nortel Networks Inc.
                                   5555 Windward Parkway
                                   Suite B
                                   Alpharetta, GA 30004
                                   Attention:  VP Marketing, Local Internet

                                   With a copy to:

                                   Legal Department
                                   Nortel Networks Inc.
                                   2221 Lakeside Blvd.
                                   Richardson, TX  75082
                                   Attention:  Lead Counsel, Supply Management

17.      GOVERNING LAW  The laws of the State of Georgia, except for its
         conflict of laws rules, will govern this Agreement. Application of the
         United Nations Convention on Contracts for the International Sale of
         Goods is specifically excluded from this Agreement.

18.      GENERAL

         18.1     Severability If any provision of this Agreement is determined
                  to be legally unenforceable or invalid, the remaining
                  provisions will continue in effect. The parties will
                  substitute a provision that most closely approximates the
                  economic effect and intent of the invalid provision.

         18.2     Assignment Except as provided below in this Section 18.2,
                  neither party will assign or transfer this Agreement, or its
                  rights, duties or obligations under this Agreement, without
                  the prior written consent of the other party. Without
                  Purchasers consent Nortel may subcontract its duties and
                  obligations hereunder, in whole or in part, without
                  Purchaser's consent. Also without Purchaser's consent Nortel
                  may assign this Agreement, in whole or in

                                     Pg. 8

<PAGE>   9

                  part, (i) to an affiliate of Nortel; or (ii) to a person or
                  entity to which has succeeded to all or substantially all of
                  Nortel's business and assets to which this Agreement relates;
                  or (iii) to any third party contract manufacturer or other
                  third party which has agreed to assume and perform Nortel's
                  obligations and duties under this Agreement. Nortel shall be
                  relieved of all of its obligations and released from any
                  liability under this Agreement as of the effective date of any
                  such assignment. Notwithstanding the preceding sentence, if
                  Nortel assigns this Agreement to a third party under option
                  (iii) above, Nortel shall ensure that Purchaser receives the
                  benefit of the Prices established pursuant to the first
                  sentence of Section 6.1 with respect to any Products ordered
                  by Purchaser from such third party after such assignment.

         18.3     Waiver  Unless waived in and agreed in writing by the parties,
                  no action or inaction by a party under this Agreement will
                  constitute a waiver of (i) a party's rights or obligations
                  under this Agreement; or (ii) a party's breach of this
                  Agreement.

         18.4     Independent Contractors  Under this Agreement each party is an
                  independent contractor. This Agreement does not create a joint
                  venture, partnership, principal-agent or employment
                  relationship between Nortel and Purchaser.

         18.5     Incorporation of Exhibits  All exhibits attached to this
                  Agreement are incorporated in this Agreement.

         18.6     Entire Agreement  This Agreement is the entire agreement
                  between Purchaser and Nortel with respect to the subject
                  matter hereof. This Agreement supersedes all prior written or
                  oral agreements on the subject matter. This Agreement may not
                  be modified or amended except in writing executed by the duly
                  authorized representatives of both parties

         18.7     Nortel Audit Rights  From time to time upon 15 days notice to
                  Purchaser, Nortel may audit Purchaser's applicable records
                  during normal business hours to confirm that Purchaser is
                  complying with its obligations under Sections 1.3, 1.4 and
                  1.5.

         18.8     Press Releases  Neither party shall issue any press releases
                  or use the name of the other party in any advertisements
                  except with the prior written consent of the other party.

                           [Signature Page to Follow]

                                     Pg. 9

<PAGE>   10

IN WITNESS WHEREOF, the parties have caused this Purchase and Sale Agreement to
be executed by their duly authorized representatives as of the Effective Date.

NORTEL NETWORKS INC.                     ARRIS INTERACTIVE L.L.C.

By: Michael Dadoun                       By: /s/ David Potts
   ----------------------------------       ------------------------------------
               (Signature)                             (Signature)

Name:                                    Name:
     --------------------------------         ----------------------------------
                 (Print)                                  (Print)

Title:                                   Title:
      -------------------------------          ---------------------------------

                                     Pg. 10<PAGE>   1

                                                                   EXHIBIT 10.12

                             SUPPLEMENTAL INDENTURE

         SUPPLEMENTAL INDENTURE (the "SUPPLEMENTAL INDENTURE"), dated as of
August 3, 2001, between ANTEC Corporation, a Delaware corporation (the
"COMPANY"), Arris Group, Inc. (f/k/a Broadband Parent Corporation), a Delaware
corporation ("ARRIS GROUP"), and The Bank of New York, a New York banking
corporation, as Trustee (the "TRUSTEE"), to the Indenture between the Company
and the Trustee, dated as of May 8, 1998, as amended or supplemented from time
to time (the "INDENTURE"). Capitalized terms not otherwise defined herein shall
have the meanings given such terms in the Indenture.

                                   WITNESSETH:

         WHEREAS, pursuant to an Agreement and Plan of Reorganization, dated as
of October 18, 2000, as amended (as amended, the "PLAN OF REORGANIZATION") by
and among the Company, Arris Group, Broadband Transition Corporation
("TRANSITION"), Nortel Networks Inc., Nortel Networks LLC and Arris Interactive
L.L.C., Transition, a wholly-owned subsidiary of Arris Group and in indirect
wholly-owned subsidiary of the Company, will merge (the "MERGER") with and into
the Company and each share of common stock, par value $0.01 per share, of the
Company (the "COMPANY COMMON STOCK") then outstanding will become one (1) share
of common stock, par value $0.01 per share, of Arris Group ("ARRIS GROUP COMMON
STOCK");

         WHEREAS, the Indenture provides that, subject to the provisions of the
Indenture, any Security may at any time, be converted into fully paid and
non-assessable shares of Company Common Stock;

         WHEREAS, pursuant to Section 13.6 of the Indenture (all section
references herein are to the Indenture) the Company and Arris Group are
delivering to the Trustee this Supplemental Indenture, which provides that on
and after the effective time of the Merger (the "EFFECTIVE TIME"), the Holder of
each Security then outstanding shall have the right thereafter to convert such
Security into shares of Arris Group Common Stock upon the same terms as such
Security was convertible into Company Common Stock immediately prior to the
Effective Time;

         NOW, THEREFORE, intending to be legally bound hereby, the parties
hereto agree as follows for the benefit of each other party and for the equal
and ratable benefit of the Holders of the Company's 4 1/2% Convertible
Subordinated Notes due 2003:

                                    ARTICLE I

                    CONTINUATION OF CONVERSION PRIVILEGE FOR
                            ARRIS GROUP COMMON STOCK

         Section 1.1       Subject to and upon compliance with the provisions of
Article XIII of the Indenture, on and after the Effective Time, at the option of
the Holder thereof, each Security shall be convertible into fully paid and
non-assessable shares of Arris Group Common Stock at the same Conversion Price
(as subsequently adjusted from time to time in accordance with the terms of the
Indenture) as such Security was convertible into Company Common Stock
immediately

<PAGE>   2

prior to the Effective Time of the Merger. From and after the Effective Time,
all references in the Indenture to "Common Stock" shall mean Arris Group Common
Stock.

         Section 1.2       The Company shall notify the Trustee of the Effective
Time of the Merger in the Officers' Certificate contemplated by Section 2.1
hereof.

                                   ARTICLE II

                                 EFFECTIVE TIME

         Section 2.1       This Supplemental Indenture shall become effective
upon the last to occur of:

                  (a)      execution of this Supplemental Indenture by the
parties;

                  (b)      receipt by the Trustee of a duly executed Officers'
Certificate substantially in the form attached hereto as Exhibit A; and

                  (c)      receipt by the Trustee of an opinion of counsel of
the Company in the form required by the Indenture.

                                   ARTICLE III

                                  MISCELLANEOUS

         Section 3.1       The Indenture, as amended and modified by this
Supplemental Indenture, is in all respects ratified and confirmed; this
Supplemental Indenture shall be deemed part of the Indenture in the manner and
to the extent herein and therein provided; and all the terms, conditions, and
provisions of the Indenture shall remain in full force and effect, as amended
and modified hereby.

         Section 3.2       THIS SUPPLEMENTAL INDENTURE SHALL BE GOVERNED BY AND
CONSTRUED IN ACCORDANCE WITH THE INTERNAL LAWS OF THE STATE OF NEW YORK, AS
APPLIED TO CONTRACTS MADE AND PERFORMED WITHIN THE STATE OF NEW YORK.

         Section 3.3       All parties may sign any number of copies or
counterparts of this Supplemental Indenture. Each signed copy or counterpart
shall be an original, but all of them together shall represent the same
agreement.

         Section 3.4       The recitals contained herein shall be taken as the
statements of the Company and Arris Group, and the Trustee assumes no
responsibility for their correctness. The Trustee makes no representations as to
the validity or sufficiency of this Supplemental Indenture.

                                       2
<PAGE>   3

         IN WITNESS WHEREOF, the parties hereto have caused this Supplemental
Indenture to be duly executed.

                                          ANTEC CORPORATION

                                          By: /s/ Lawrence A. Margolis
                                             -----------------------------------
                                          Name:  Lawrence A. Margolis
                                          Title: Executive Vice President
                                          ARRIS GROUP, INC.

                                          By: /s/ Lawrence A. Margolis
                                             -----------------------------------
                                          Name:  Lawrence A. Margolis
                                          Title: Vice President

                                          THE BANK OF NEW YORK, as Trustee

                                          By: /s/ Mary La Gumina
                                             -----------------------------------
                                          Name:
                                          Title:

                                       3

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