Telecommunications market of Asian countries (defined as Bangladesh, Pakistan, Sri Lanka and Vietnam) will grow at a compound annual growth rate (CAGR) of 36% from 2007-2011, according to IDC. The data segment, which includes mobile data services, fixed line corporate data and Internet access services, grew strongly at 258% year-on-year in 2006, reaching $952 mln. While these four country markets will remain generally voice-centric throughout the forecast period, revenue share of the data segment will improve significantly from 17% in 2006 to over 30% by 2011. The mobile data segment from the four countries is anticipated to escalate at 41% CAGR from 2007-2011, driven by expected growth in SMS usage. Fixed lines data, on the other hand, will grow at 24% CAGR from 2007-2011.