miniSIPServer is described as 'You will be able to setup your own VOIP system in ONE HOUR. miniSIPServer can run on Windows, Linux and even Raspberry Pi. We can also run it on kinds of virtual machine systems, such as Hyper-V, VMWare, KVM, Xen' and is an app in the Social & Communications category. There are more than 10 alternatives to miniSIPServer for a variety of platforms, including Linux, Windows, Mac, Online / Web-based and Self-Hosted solutions. The best alternative is Asterisk, which is both free and Open Source. Other great apps like miniSIPServer are 3CX Phone System (Freemium), Wazo (Free, Open Source), FusionPBX (Free, Open Source) and XiVO (Free, Open Source).
sipXcom provides complete enterprise-grade telephony, unified messaging, Instant messaging, audio conferencing, and many other features. sipXcom can be run along side your existing Cisco, Avaya, Mitel, Shortel or other PBX while you migrate users to the sipXcom system.