Intervoice to Enhance Its Market Leadership Position with Agreement to Acquire Edify; Merged Company to Increase Market Share Strengthening its Leadership Position in the Voice Automation Arena

Intervoice, Inc. (NASDAQ: INTV), a world leader inconverged voice and data solutions, today signed an agreement topurchase Edify Corporation, a leading global supplier of interactivevoice response solutions, from S1 Corporation (NASDAQ: SONE), Edify'sparent company. Upon closing, Intervoice will pay S1 $33.5 million incash to acquire Edify. The acquisition will strengthen Intervoice'sposition in the voice automation market. Additionally, the addedrevenues and resources will enable Intervoice to accelerate thedevelopment and delivery of multi-channel, automated informationsolutions for both its enterprise and network customers.

According to the latest research from independent market analystDatamonitor, the merger will strengthen Intervoice's number twoposition in the voice self-service market. Additionally, in the latestGartner Magic Quadrant for IVR Systems and Enterprise Voice Portals(June 2005), Intervoice and Edify were both placed in the Leadersquadrant. The combination of Intervoice and Edify will placeIntervoice at the forefront of the industry, with substantialresources to accelerate the delivery of speech solutions acrossmulti-channel (i.e., voice, data, and video) portals.

"The joining of Intervoice and Edify will bring unmatchedexpertise in providing customers with award-winning, standards-basedautomated information solutions," said Bob Ritchey, President and CEOof Intervoice. "Each company has achieved market success andprofitability. We are both highly respected in this industry, makingthis a very positive combination for our joint customers and partners.We intend to accelerate the delivery of multi-channel solutions thatmeasurably enhance customer satisfaction, creating customers forlife."

The New Intervoice

The merger will bring together Intervoice's expertise indevelopment tools, standards-based applications and global presencewith Edify's prowess in Web-based tools, natural language applicationsand broad North American market presence. Collectively, the companieswill have a strong balance sheet, an impressive patent portfolio,award-winning product and services offerings, and world-classcustomers and partners. The merger is expected to close in December2005, subject to normal and customary closing conditions. Bob Ritcheywill continue as President and CEO of Intervoice. Edify President andCEO Mitch Mandich will stay with the company through a transitionperiod as an advisor to ensure a successful integration of the newlycombined enterprise.

"This merger will mark a turning point in the speech industry,"said Mitch Mandich, CEO of Edify. "Two financially compelling marketleaders are coming together to create an even stronger company thatwill benefit from its enhanced capabilities to deliver speechsolutions to a growing market."

Over the last four fiscal quarters, as published in Intervoice'sand S1's respective quarterly disclosures, Intervoice and Edify hadcombined revenue in excess of $200 million. At closing, the combinedcompany is expected to have more than 850 employees around the world.Together, Intervoice and Edify have deployed more than 1.5 millionports handling millions of mission critical calls daily for more than5000 customers worldwide. With a large installed base, a significantshare of the market, and proven solutions, the new Intervoice will bepoised to take a competitive lead in offering comprehensive solutionsto any organization looking for enhanced customer service, improvedaccess to information and increased productivity through automatedinformation systems.

"We believe this acquisition is a good investment for ourshareholders. Edify's recurring maintenance revenues, voice-automationsolutions and world-class customer base will immediately drive revenuegrowth following the closing," said Craig Holmes, Executive VicePresident and Chief Financial Officer of Intervoice. "Intervoice hasachieved industry leading profitability, and we expect thisacquisition to be accretive to gross margins, operating margins andearnings per share within the first year after closing thetransaction."

"From S1's point of view, we have been pleased with Edify's moveto profitability and leadership during the past two years, and believethat its products and talented people will add to Intervoice's alreadystrong position in the industry and accelerate voice channelopportunities," said James S. Mahan, III, CEO and Chairman of S1Corporation. "Our joint development effort with Edify resulted in astrong voice channel for our banking customers, and we look forward tocontinuing as a reseller of the joint voice banking products."

Investor Information

Intervoice has scheduled a conference call for 10:00 a.m. centraltime on Friday November 18, 2005, to discuss its vision and strategyfor the combined company and general information about the Company'sfinancial performance to date. To participate in the call, dial (913)981-5542. The conference call confirmation code is 4393034. A webcastand replay of the call will be available at the Company's Web site:www.intervoice.com.

Intervoice has included in this press release certain"forward-looking statements" within the meaning of the PrivateSecurities Litigation Reform Act of 1995 concerning its business andoperations that are based on management's current beliefs. Allstatements other than statements of historical fact in this pressrelease are forward-looking statements. Readers are cautioned to readthe risks and uncertainties, described in the Company's filings withthe Securities and Exchange Commission, including without limitation,the risks and uncertainties set forth under the caption entitled"Cautionary Disclosures to Qualify Forward Looking Statements" in theCompany's Annual Report filed on Form 10-K and Quarterly Reports filedon Form 10-Q. Intervoice cautions current and potential investors thatsuch risks and uncertainties could result in material differences fromthe forward-looking statements in this press release. Readers arefurther cautioned that any analysis or comparison of financial resultsfrom operations concerning Intervoice and Edify is subject toIntervoice's fiscal year ending the last day of February and S1Corporation's fiscal year ending the last day of December.

About Edify Corporation

With fifteen years of industry leadership and innovation in voiceand speech applications, Edify has changed the way more than 2,000global companies enhance customer service. Applications built withEdify are scalable, multilingual and flexible, allowing companies toeasily integrate backend systems with multiple contact interfaces.Edify's open, standards-based platform successfully manages millionsof customer interactions every day across a broad range of industries.The Edify Design Collaborative and consultancy experts assistcustomers with the design and deployment of speech solutions thatprovide increased customer satisfaction with reduced costs. You speak,we deliver(TM).

Additional information about Edify may be obtained by calling408-982-2000 (USA) or +44 162 885 0222 (Europe, Middle East, Africa)or via the World Wide Web at http://www.edify.com

About Intervoice, Inc.

Intervoice, Inc. (Nasdaq:INTV) provides leading enterprises andnetwork operators with the platform, software, applications andservices necessary to optimize the customer experience through voiceautomation solutions. Omvia(R), the open, standards-based Intervoiceproduct suite, offers unparalleled flexibility for advancedmulti-media messaging, portal, IVR and payment applications. TheCompany's two market units focus on enterprise and network markets,providing solutions that improve operational efficiencies, driverevenue and increase customer satisfaction and loyalty. Building onmore than 20 years of systems integration and service deliveryexperience, the Professional Services Agility Suite from Intervoice isdesigned to provide proven best practices toward design,implementation, and optimization of voice applications. Intervoicesystems have been proven in more than 23,000 implementations worldwideat companies across a variety of industries including: Ameritrade,Amtrak, Atmos Energy, Citibank, CSX Transportation, MasterCard, O2,Rogers Wireless, SBC, Travelocity, Verizon and Vodafone. A MicrosoftCertified Partner and Certified Partner for Learning Solutions,Intervoice is headquartered in Dallas with offices in Europe, theMiddle East, South America, Africa and Asia-Pacific. For moreinformation, visit www.intervoice.com.

About S1

S1 Corporation (NASDAQ: SONE) is a leading global provider ofintegrated front-office applications for more than 4,000 banks, creditunions and insurance providers around the world. Comprised ofapplications that address virtually every market segment and deliverychannel, S1 solutions help integrate and optimize an institution'sentire front office, resulting in increased operational efficiencies,revenue opportunities and overall customer satisfaction. S1 is theonly provider with the proven experience, breadth of products andfinancial strength to empower financial services companies' enterprisestrategies. Additional information about S1 is available atwww.s1.com.

This press release contains forward-looking statements within thesafe harbor provisions of the Private Securities Litigation ReformAct. These statements include statements with respect to our financialcondition, results of operations and business. The words "believes,""expects," "may," "will," "should," "projects," "contemplates,""anticipates," "forecasts," "intends" or similar terminology identifyforward-looking statements. These statements are based on our beliefsas well as assumptions made using information currently available tous. Because these statements reflect our current views concerningfuture events, they involve risks, uncertainties and assumptions.Therefore, actual results may differ significantly from the resultsdiscussed in the forward-looking statements. The risk factors includedin our reports filed with the Securities and Exchange Commission (andavailable on our web site at www.s1.com or the SEC's web site atwww.sec.gov) provide examples of risks, uncertainties and events thatmay cause our actual results to differ materially from theexpectations we describe in our forward-looking statements. Except asprovided by law, we undertake no obligation to update anyforward-looking statement.