FreedomIQ VoIP Blog » Public-Switched Telephone Network http://www.freedomiq.com/blog Read the latest hosted VoIP and business VoIP service news at the FreedomIQ VoIP Blog Wed, 11 Aug 2010 18:33:57 +0000 http://backend.userland.com/rss092 en How SIP Trunking Works: IP-PBX vs Hosted VoIP PBX http://www.freedomiq.com/blog/how-sip-trunking-works-pbx-vs-hosted-pbx/