The AltiServ family of IP business telephone systems offers 5 award winning IP-PBX telephone systems. The AltiServ family supports logical stepped increments of 25, 50, 100, 200, and 300 users per chassis. Every AltiGen IP phone system has the ability to continue to expand by networking multiple local and remote systems together. AltiServ makes it easier and more affordable for customers of all sizes to implement reliable IP-PBX telephone systems and IP contact center solutions.