Research firm of Frost and Sullivan has publicized a research on World Enterprise Market of Telephony services. The statistics, facts and findings are as follows:

- The World enterprise telephony systems market is counted to have shipped 37.3 million phone lines in 2009, compared with 2008 it is negative rate of growth by 20.4 percent

- Traditional phone systems consist of 25.8 percent of total phone line shipments, downing at a rate of 18.1 percent each year. NEC (Nippon Electric Corporation) is the undisputed market leader in this nomination, having around 3.6 million TDM lines shipped; Panasonic and Siemens companies follows next in list

- The decline of traditional-line shipments is expected to be greater in years to come as customers continue to comprehend the benefits of IP communications and legacy of TDM/KTS PBX systems is phased by vendors gradually.

- IP systems, converged or native, are accounted for 74.2 percent of total line shipments, but declining by 21.2 percent in 2009. The decline, in general, was due to the economic recession and collapse of Nortel.

- Cisco was the IP market leader, having 18.3 percent share, then Avaya (15.7 percent), Siemens (14.5 percent).

- Cisco was the market leader in total line shipments, having 13.6 percent share, followed by NEC (13.3 percent) and Avaya (12.9 percent).

- Telephony systems market is assessed to generate $5.7 billion in 2009, being a 24.9 percent in decline.

- However, Compound Annual Growth Rate (CAGR) is counted as 1,1 percent of growth over seven years period of forecast.

- Traditional systems made up 21.4 percent of market revenues, with a annual decline rate of 27.3 percent. NEC is the market leader with a 33 percent market share, followed by Panasonic, Avaya, Nortel and Siemens, in that order.

Research believes that IP line shipments and revenues will continue to outgo TDM line shipments and revenues. Share of TDM will be shrunk, by researchers, to less than 10 percent at the end of the forecast period (year 2016).