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Who are some of the better VoIP vendors currently in the marketplace? Specifically, vendors who supply VoIP PBX systems? We are looking for a system capable of growing to 250 users and, initially, we wish it to interface with our legacy NEC NEAX SDS-SP.
There are multiple VoIP PBX manufacturers, but it is important to select a system based on open standards that will allow you to integrate with your existing infrastructure and add devices from other vendors if you decide to. You should also consider a system that is easy to manage and highly integrated. I recommend that you look at the MX250 from Zultys Technologies for your application. It is a comprehensive and feature rich IP PBX that is easily expanded using software licenses. See
. The system can also interface with your
using tie lines.