After dipping one percent in the previous quarter, enterprise telephony equipment manufacturers saw an 11 percent jump in worldwide sales in the third quarter of 2007 to reach $2.6 billion, according to Infonetics Research. But IP-based phone systems did not get all the growth. In fact, Infonetics researchers say the rate of growth in the legacy time division multiplex segment actually outpaced that of the IP PBX segment.
In fact, hybrid PBX systems account for 64 percent of all PBX and key system line shipments worldwide. Pure IP lines account for 18 percent of shipments while TDM lines represent 17 percent of total.
It looks like lots of buyers still are hedging their bets or have reasons to support TDM systems even as they migrate to IP.
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