We love the SBX for small business customers. It just works - until you are asked to use SIP trunks. Has anyone found a SIP provider that works reliably on SBX? I know the "certified" providers are suppose to be reliable but there seems to be different definitions of "reliable". My definition of reliable is that the SIP trunks work as long as the Internet provider is up and running. Some techs think having to reset the SBX on a monthly basis because the SIP trunks lock up is acceptable. Not to my customer its not! What have you found? Thx