Worldwide PBX/KTS revenue grew 12% to $1.6 bln between Q1 and Q2 2005, and is forecast to total close to $7 bln in 2005, according to Infonetics Research. TDM equipment revenue is expected to plummet, from $2.8 bln in 2003 to $759 mln in 2008, but the overall market is growing due to strong IP PBX sales, which jumped 17% to $1.2 bln in Q2 2005. Worldwide hybrid PBX revenue will nearly triple and pure IP PBX more than quadruple between 2003 and 2008. The top IP PBX system vendors for worldwide lines shipped are the same as Q1 2005: Alcatel is #1, followed by Nortel, Avaya, Cisco, and Mitel. Worldwide PBX/KTS unit shipments totaled 131,000 in Q2 2005, up 13% from Q1 2005. TDM makes up 49%, hybrid 42%, and pure IP 9% of worldwide units shipped. Hybrid PBXs account for 58% of total PBX/KTS revenue, TDM 26%, and pure IP 16%; by 2008, hybrids will grow to 69% of the market, pure IP will increase to 23%, and TDM will drop to 8%.