<![CDATA[sip trunking Resources | ZDNet]]> en-us <![CDATA[SIP Trunking is Key to Accelerating Unified Communications Deployments]]> Mon, 01 Jun 2009 00:00:00 -0700 <![CDATA[SIP trunking 101]]> Mon, 07 Jul 2008 16:35:01 -0700