Infonetics Research says that the worldwide PBX/KTS revenue dropped 12% to $1.5 billion between 4Q04 and 1Q05, and the number of PBX/KTS lines shipped worldwide decreased to 6.3 million in 1Q05, 15% lower than in 4Q04. Pure IP is the only PBX category to beat the budget blues in 1Q05, increasing 10% to $223 million, 36% higher than a year ago. Revenue is forecast to jump another 24% to $277 million in 1Q06. Pure IP and hybrid system revenue together total $1 billion. Most of the hybrid players had a down first quarter, but the pure IP players, like 3Com, Cisco, and ShoreTel, were able to maintain growth.