 In addition to growing organically , Comverse Technology began acquiring other companies in both Israel and the U.S. It acquired Dale , <unk> , McWilliams , & Sheridan , later known as DGM & S Telecom , in 1996 and renamed it Ulticom in 1999 . Comverse Technology acquired one of its key rivals , Boston Technology , for $ 843 million in stock in 1997 . The acquisition gave Comverse entree into the large U.S. telecommunications market and meant Comverse would be supplying voice messaging systems to 12 of the world 's top 20 carriers , and left it the third @-@ largest supplier after Lucent and Northern Telecom . In 1999 , as it saw record earnings , Comverse formed two wholly owned subsidiaries , Comverse Network Systems and Comverse Infosys , representing the telecommunications services platforms and products and the digital monitoring and recording products , respectively . By 2000 , its revenues were $ 1 @.@ 2 billion and it had global operations . It continued to aggressively acquire small companies to fill out its technologies , as exemplified by the purchase of <unk> , Gaya Software , and <unk> , all within a 30 @-@ day period in 2000 . The company 's stock price rose from around $ 10 in late 1998 to over $ 120 in early 2001 . The company was able to raise money several times on Nasdaq , including once for its Ulticom subsidiary and once ( at a valuation of $ 600 million ) shortly before the Dot @-@ com bubble burst . 
