EXHIBIT 99.1

                    TEKELEC COMPLETES ACQUISITION OF STELEUS
              ACQUISITION FORMS CORNERSTONE OF NEW COMMUNICATIONS
                        SOFTWARE SOLUTIONS BUSINESS UNIT

CALABASAS, CA (THURSDAY, OCTOBER 14, 2004): Tekelec (NASDAQ:TKLC) today
announced it has completed the acquisition of Steleus Group Inc., a real-time
performance management company that supplies network-related intelligence to
telecom operators.

In order to expedite the closing, the companies have agreed to modify the merger
consideration from the terms originally announced August 20, 2004. Under the
revised terms, Tekelec has purchased 100 percent of Steleus' outstanding stock
for approximately $55 million, all cash. The original consideration consisted of
approximately $29 million in cash and $27 million of Tekelec stock. All other
terms of the transaction remain consistent with those originally announced.

"Our customers' response to the Steleus acquisition has been quite positive,"
said Fred Lax, Tekelec's president and CEO. "The acquisition expands Tekelec's
portfolio of value-added applications with real-time monitoring and management
capabilities for legacy and next-generation networks, helping operators around
the globe lower risk, reduce time to market for new services and realize
significant cost savings."

Steleus will form the cornerstone of Tekelec's new Communications Software
Solutions business unit, which also will include existing Tekelec applications
and will be led by Rick Mace, current president, CEO and chairman of the board
of Steleus.

"Leveraging our past collaboration with Steleus, we already have made
significant progress with plans to integrate Steleus' GPRS [general packet radio
services] and VoIP [voice over Internet protocol] solutions into our portfolio
of next-generation switching, signaling and value-added solutions offerings,"
Lax added. "This solutions portfolio will help our global customers evolve their
networks to IP at their own pace, implementing exactly what they need, when they
need it."

EMPLOYMENT INDUCEMENT STOCK OPTIONS AND RESTRICTED STOCK UNITS

In connection with the acquisition, 119 Steleus officers and employees were
granted options to purchase a total of 881,550 shares of Tekelec common stock,
of which options to purchase 200,000 shares were granted to Rick Mace, president
and CEO of Steleus. In addition, seven Steleus officers and key employees were
granted Restricted Stock Units (RSUs) representing the right to receive a total
of 98,510 shares of Tekelec common stock, of which RSUs covering 34,478 shares
of Tekelec common stock were granted to Mr. Mace.

The number of shares subject to such options and RSUs amounts to less than 2
percent of the outstanding shares of Tekelec common stock. The option and RSU
grants were made under Tekelec's 2004 Equity Incentive Plan for New Employees
and met the "employee inducement" exception to the Nasdaq rules requiring
shareholder approval of equity-based incentive plans.



ABOUT TEKELEC

Tekelec is a leading developer of now and next-generation switching and
signaling telecommunications solutions, network performance management
technology, and value-added applications. Tekelec's innovative solutions are
widely deployed in traditional and next-generation wireline and wireless
networks and contact centers worldwide. Corporate headquarters are located in
Calabasas, California, with research and development facilities and sales
offices throughout the world.

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FORWARD-LOOKING STATEMENTS

Certain statements made in this news release are forward looking, reflect
Tekelec's current intent, belief or expectations and involve certain risks and
uncertainties. There can be no assurance that Tekelec's actual future
performance will meet Tekelec's expectations. As discussed in Tekelec's 2003
Annual Report on Form 10-K and other filings with the SEC, Tekelec's future
operating results are difficult to predict and subject to significant
fluctuations. Factors that may cause future results to differ materially from
Tekelec's current expectations include, among others: overall telecommunications
spending, changes in general economic conditions, the timing of significant
orders and shipments, the lengthy sales cycle for Tekelec's products, the timing
of the convergence of voice and data networks, the ability of carriers to
utilize excess capacity of signaling infrastructure and related products in the
network, the capital spending patterns of customers, the dependence on wireless
customers for a significant percentage and growth of Tekelec's revenues, the
success or failure of strategic alliances or acquisitions including the success
or failure of the integration of the operations of Steleus, Santera, Taqua, and
VocalData with those of the Company, the timely development and introduction of
new products and services, product mix, the geographic mix of Tekelec's revenues
and the associated impact on gross margins, market acceptance of new products
and technologies, carrier deployment of intelligent network services, the
ability of our customers to obtain financing, the level and timing of research
and development expenditures, regulatory changes, and the expansion of Tekelec's
marketing and support organizations, both domestically and internationally.
Tekelec undertakes no obligation to publicly update any forward-looking
statements whether as a result of new information, future events or otherwise.

Investor Contacts:
Mike Attar
Director, Investor Relations, Tekelec
818.880.7821
michael.attar@tekelec.com

U.S. Press Contact:
Joni K. Brooks
Manager, Public Relations, Tekelec
919-461-1065
Joni.Brooks@Tekelec.com

Europe Press Contact:
Virginie Rampon
Marketing Communications Manager, Steleus
+33 4 3749 7561
v.rampon@steleus.com

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