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                                                                   EXHIBIT 10.15

                              [IMPERIAL BANK LOGO]
                                  Member FDIC

                           GENERAL SECURITY AGREEMENT
                  (TANGIBLE AND INTANGIBLE PERSONAL PROPERTY)

This Agreement is executed on October 22, 1996, by TEKELEC (hereinafter called
"Obligor").  In consideration of financial accommodations given, to be given or
continued, the Obligor grants to IMPERIAL BANK (hereinafter called "Bank") a
security interest in (a) all property (i) delivered to Bank by Obligor, (ii)
which shall be in Bank's possession or control in any matter or for any purpose,
(iii) described below, (iv) now owned or hereafter acquired by Obligor of the
type or class described below and/or in any supplementary schedule hereto, or in
any financing statement filed by Bank and executed by or on behalf of Obligor;
(b) the proceeds, increase and products of such property, all accessions
thereto, and all property which Obligor may receive on account of such
collateral which Obligor will immediately deliver to Bank (collectively referred
to as "Collateral") to secure payment and performance of all of Obligor's
present or future debts or obligations to Bank, whether absolute or contingent
(hereafter referred to as "Debt"). Unless otherwise defined, words used herein
have the meanings given them in the California Uniform Commercial Code.

Collateral:

A.  VEHICLE, VESSEL, AIRCRAFT:
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<CAPTION>
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                                       Identification       License or
Year     Make/Manufacturer    Model    and Serial No.    Registration No.    New or Used
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<S>      <C>                  <C>      <C>               <C>                 <C>


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Engine or other equipment: _____________________________________________________________
(For aircraft - original ink signature on copy to FAA)

B.  DEPOSIT ACCOUNTS:

Type ________________________ Account Number ___________________ Amount $ ______________

In name of ______________________________________ Depository ___________________________
AND ALL EXTENSIONS OR RENEWALS THEREOF.
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C.  ACCOUNTS, INTANGIBLES AND OTHER: (Describe)

        All personal property, whether presently existing or hereafter created
        or acquired, including but not limited to: All accounts, chattel paper,
        documents, instruments, money, deposit accounts and general intangibles
        including returns, repossessions, books and records relating thereto,
        and equipment containing said books and records. All goods including
        equipment and inventory. All proceeds including, without limitation,
        insurance proceeds. All guarantees and other security therefor.

The collateral not in Bank's possession will be located at:

                                26580 West Agoura Rd, Calabasas, CA 91302
                                5151 McCrimmon Pkwy, Ste. 216, Morrisville, NC

[ ]  If checked, the Obligor is executing this Agreement as an Accommodation
Debtor only and the Obligor's liability is limited to the security interest
granted in the Collateral described herein. The party being accommodated is
___________________ ("Borrower").

All the terms and provisions on the reverse side hereof are incorporated herein
as though set forth in full, and constitute a part of this Agreement.


                                   Signature
        Name            (indicate title, if applicable)             Address


   TEKELEC                 BY  /s/ GILLES C. GODIN     26580 West Agoura Road
-------------------------- -------------------------- --------------------------
                           V.P. Finance & CFO

                           BY  /s/ DOUGLAS W. MOXLEY   Calabasas, CA 91302-
-------------------------- -------------------------- --------------------------
                           Corporate Controller

COPY FOR YOUR INFORMATION
-------------------------- -------------------------- --------------------------

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                         SECURITY AGREEMENT (CONTINUED)

Obligor represents, warrants and agrees:

 1.     Obligor will immediately pay (a) any Debt when due, (b) Bank's costs of
collecting the Debt, of protecting, insuring or realizing on Collateral, and any
expenditure of Bank pursuant hereto, including attorneys' fees and expenses,
with interest at the rate of 24% per year, or the rate applicable to the Debt,
whichever is less, from the date of expenditure, and (c) any deficiency after
realization of Collateral.

 2.     Obligor will use the proceeds of any loan that becomes Debt hereunder
for the purpose indicated on the application therefore, and will promptly
contract to purchase and pay the purchase price of any property which becomes
Collateral hereunder from the proceeds of any loan made for that purpose.

 3.     As to all Collateral in Obligor's possession (unless specifically
otherwise agreed to by Bank in writing), Obligor will:

        (a)     Have, or has, possession of the Collateral at the location
        disclosed to Bank and will not remove the Collateral from the location.

        (b)     Keep the Collateral separate and identifiable.

        (c)     Maintain the Collateral in good and saleable condition, repair
        it if necessary, clean, feed, shelter, water, medicate, fertilize,
        cultivate, irrigate, prune and otherwise deal with the Collateral in all
        such ways as are considered good practice by owners of like property,
        use it lawfully and only as permitted by insurance policies, and permit
        Bank to inspect the Collateral at any reasonable time.

        (d)     Not sell, contract to sell, lease, encumber or transfer the
        Collateral (other than inventory Collateral) until the Debt has been
        paid, even though Bank has a security interest in proceeds of such
        Collateral.

 4.     As to Collateral which is inventory and accounts, Obligor:

        (a)     May, until notice from Bank, sell, lease or otherwise dispose of
        inventory Collateral in the ordinary course of business only, and
        collect the cash proceeds thereof.

        (b)     Will, upon notice from Bank, deposit all cash proceeds as
        received in a demand deposit account with Bank, containing only such
        proceeds and deliver statements identifying units of inventory disposed
        of, accounts which gave rise to proceeds, and all acquisitions and
        returns of inventory as required by Bank.

        (c)     Will receive in trust, schedule on forms satisfactory to the
        Bank and deliver to Bank all non-cash proceeds other than inventory
        received in trade.

        (d)     If not in default, may obtain release of Bank's interest in
        individual units of inventory upon request, therefore, payment to Bank
        of the release price of such units as shown on any Collateral schedule
        supplementary hereto, and compliance herewith as to proceeds thereof.

 5.     As to Collateral which are accounts, chattel paper, general intangibles
and proceeds described in 4(c) above, Obligor warrants, represents and agrees:

        (a)     All such Collateral is genuine, enforceable in accordance with
        its terms, free from default, prepayment, defense and conditions
        precedent (except as disclosed to and accepted by Bank in writing), and
        is supported by consecutively numbered invoices to, or rights against,
        the debtors thereon. Obligor will supply Bank with duplicate invoices or
        other evidence of Obligor's rights on Bank's request;

        (b)     All persons appearing to be obligated on such Collateral have
        authority and capacity to contract;

        (c)     All chattel paper is in compliance with law as to form, content
        and manner of preparation and execution and has been properly
        registered, recorded, and/or filed to protect Obligor's interest
        thereunder;

        (d)     If an account debtor shall also be indebted to Obligor on
        another obligation, any payment made by him not specifically designated
        to be applied on any particular obligation shall be considered to be a
        payment on the account in which Bank has a security interest.  Should
        any remittance include a payment not on an account, it shall be
        delivered to Bank and, if no event of default has occurred, Bank shall
        pay Obligor the amount of such payment;

        (e)     Obligor agrees not to compromise, settle or adjust any account
        or renew or extend the time of payment thereof without Bank's prior
        written consent.

 6.     Obligor owns all Collateral absolutely, and no other person has or
claims any interest in any Collateral, except as disclosed to and accepted by
Bank in writing.  Obligor will defend any proceeding which may affect title to
or Bank's security interest in any Collateral, and will indemnify and hold Bank
free and harmless from all costs and expenses of Bank's defense.

 7.     Obligor will pay when due all existing or future charges, liens or
encumbrances on and all taxes and assessments now or hereafter imposed on or
affecting the Collateral and, if the Collateral is in Obligor's possession, the
realty on which the Collateral is located.

 8.     Obligor will insure the Collateral with Bank as loss payee in form and
amounts with companies, and against risks and liability satisfactory to Bank,
and hereby assigns such policies to Bank, agrees to deliver them to Bank at
Bank's request, and authorizes Bank to make any claim thereunder, to cancel the
insurance on Obligor's default, and to receive payment of and endorse any
instrument in payment of any loss or return premium.  If Obligor should fail to
deliver the required policy or policies to the Bank, Bank may, at Obligor's cost
and expense, without any duty to do so, get and pay for insurance naming as the
insured, at Bank's option, either both Obligor and Bank, or only Bank, and the
cost thereof shall be secured by this Security Agreement, and shall be repayable
as provided in Paragraph 1 above.

 9.     Obligor will give Bank any information it requires.  All information at
any time supplied to Bank by Obligor (including, but not limited to, the value
and condition of Collateral, financial statements, financing statements, and
statements made in documentary Collateral) is correct and complete, and Obligor
will notify Bank of any adverse change in such information.  Obligor will
promptly notify Bank of any change of Obligor's residence, chief executive
office or mailing address.

10.     Bank is irrevocably appointed Obligor's attorney-in-fact to do any act
which Obligor is obligated hereby to do, to exercise such rights as Obligor may
exercise, to use such equipment as Obligor might use, to enter Obligor's
premises to give notice of Bank's security interest, and to collect Collateral
and proceeds and to execute and file in Obligor's name any financing statements
and amendments thereto required to perfect Bank's security interest hereunder,
all to protect and preserve the Collateral and Bank's rights hereunder.  Bank
may:

        (a)     Endorse, collect and receive delivery or payment of instruments
        and documents constituting Collateral;

        (b)     Make extension agreements with respect to or affecting
        Collateral, exchange it for other Collateral, release persons liable
        thereon or take security for the payment thereof, and compromise
        disputes in connection therewith;

        (c)     Use or operate Collateral for the purpose of preserving
        Collateral or its value and for preserving or liquidating Collateral.

11.     If more than one Obligor signs this Agreement, their liability is joint
and several.  Any Obligor who is married agrees that recourse may be had against
separate property for the Debt.  Discharge of any Obligor except for full
payment, or any extension, forbearance, change of rate of interest, or
acceptance, release or substitution of Collateral or any impairment or
suspension of Bank's rights against an Obligor, or any transfer of an Obligor's
interest to another shall not affect the liability of any other Obligor.  Until
the Debt shall have been paid or performed in full, Bank's rights shall continue
even if the Debt is outlawed.  All Obligors waive: (a) any right to require Bank
to proceed against any Obligor before any other, or to pursue any other remedy;
(b) presentment, protest and notice of protest, demand and notice of nonpayment,
demand or performance, notice of sale, and advertisement of sale; (c) any right
to the benefit of or to direct the application of any Collateral until the Debt
shall have been paid; (d) and any right of subrogation to Bank until Debt shall
have been paid or performed in full.

12.     Upon default, at Bank's option, without demand or notice, all or any
part of the Debt shall immediately become due.  Bank shall have all rights given
by law, and may sell, in one or more sales, Collateral in any county where Bank
has an office, Bank may purchase at such sale.  Sales for cash or on credit to a
wholesaler, retailer or user of the Collateral, or at public or private auction,
are all to be considered commercially reasonable.  Bank may require Obligor to
assemble the Collateral and make it available to Bank at the entrance to the
location of the Collateral, or a place designated by Bank.

        Defaults shall include:

        (a)     Obligor's failure to pay or perform this or any agreement with
        Bank or breach of any warranty herein, or Borrower's failure to pay or
        perform any agreement with Bank.

        (b)     Any change in Obligor's or Borrower's financial condition which
        in Bank's judgment impairs the prospect of Borrower's payment or
        performance.

        (c)     Any actual or reasonably anticipated deterioration of the
        Collateral or in the market price thereof which causes it, in Bank's
        judgment, to become unsatisfactory as security.

        (d)     Any levy or seizure against Borrower or any of the Collateral.

        (e)     Death, termination of business, assignment for creditors,
        insolvency, appointment of receiver, or the filing of any petition under
        bankruptcy or debtor's relief laws of, by or against Obligor or Borrower
        or any guarantor of the Debt.

        (f)     Any warranty or representation which is false or is believed in
        good faith by Bank to be false.

13.     Bank's acceptance of partial or delinquent payments or the failure of
Bank to exercise any right or remedy shall not waive any obligation of Obligor
or Borrower or right of Bank to modify this Agreement, or waive any other
similar default.

14.     On transfer of all or any part of the Debt, Bank may transfer all or any
part of the Collateral.  Bank may deliver all or any part of the Collateral to
any Obligor at any time.  Any such transfer or delivery shall discharge Bank
from all liability and responsibility with respect to such Collateral
transferred or delivered.  This Agreement benefits Bank's successors and assigns
and binds Obligor's heirs, legatees, personal representatives, successors and
assigns.  Obligor agrees not to assert against any assignee of Bank any claim or
defense that may exist against Bank.  Time is of the essence.  This Agreement
and supplementary schedules hereto contain the entire security agreement between
Bank and Obligor.  Obligor will execute any additional agreements, assignments
or documents reasonably required by Bank to carry this Agreement into effect.

15.     This Agreement shall be governed by and construed in accordance with the
laws of the State of California, to the jurisdiction of whose courts the Obligor
hereby agrees to submit.  Obligor agrees that service of process may be
accomplished by any means authorized by California law.  All words used herein
in the singular shall be considered to have been used in the plural where the
context and construction so require.

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