Paris--Telecommunications equipment manufacturer Alcatel announced Tuesday that it has agreed to acquire Genesys Telecommunications Laboratories in a stock deal valued at about $1.5 billion. With the acquisition of Genesys, a provider of computer telephony integration products, Alcatel hopes to strengthen its position in the call center market. Within the Alcatel group, Genesys will remain a stand-alone business, retain its name and continue to be headquartered in San Francisco. Alcatel has made five other acquisitions in the U.S. in the past year, including DSC and Xylan, in an effort to take advantage of the demand for voice-data integration. The Genesys deal is expected to close in January 2000.