Also the more reliable carriers will only provide you service if they provide the medium for their SIP traffic. The other providers that don't require that wont have the same amount of reliabilty or QoS. Les.net is often used for SoHo configurations or for comnpanies that have less than 5 users.
There are now 15 SIP SPs listed in the CCA 3.1 drop down box.
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