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Same feelings on VoIP trunking. Sure, you may save a few pennies on calls, but as Frank_DaFoneguy so gracefully put, the reliability is not there.
Not true on a private network. There are many ways to do VOIP, on a private network say MPLS or via the public network, the internet. The company I manage moves all its voice traffic on a private MPLS network. The savings in over $200K per year. Call quality on the MPLS is better that the PSTN IMO.


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