VOSS4UC is the unified communication management platform and it is support wide range of UC applications like cisco’s CUCM, Microsoft Skype for business.

details you can refer :www.voss-solutions.com

There are many options available to deploy hosted collaboration services:

1.VOSS4UC

2.Kurmi

3.Cisco HCS solutions (CUCDM end of sale and end of life ,dates is 12 feb 2019)

The PBX means private branch exchange is telephony system which switches calls between enterprise users on the local lines. The purpose of the PBX/EPBX is to save the cost of requiring a line for each user in a company.

The CUCM or cisco unified communication manager is a IP- based voice, video,messaging,voice mail enable software based application which provide various integration facilities to integrate various telephony applications.However, CUCM works on IP based signalling(SIP) and PBX works on analog based signalling.