Secure Phone System (VoIP and PBX) HostingVoice over IP (VoIP) is the method by which you can make phone calls over private networks, and over the public internet.
This takes on a whole new level when you combine it with the features of the open source Asterisk PBX software.
For my own business I have a central PBX running on each of my colocated equipment stacks. These are tied into the public phone system through a VoIP provider, and I have numerous phones around properties in the US and New Zealand. The data flows over encrypted VPNs so nobody - not even Federal agencies - can monitor the conversations.
This allows me to:
I can set your business up with your own private PBX running on one of my servers, securely behind my Juniper SRX firewalls.