Tomorrow is the LERG effective date for our migration from TDM to using Sinch's PSTN-Connect. We have verified calls flow via testing with our consultant (Award) and Sinch. Given that this is pretty monumental and there doesn't appear to be as easy a "backing out" as there is with the Internet, what are the things I should triple-check? What are the things I should be watching? What are the tests I should be doing to ensure everything is 100%? Also with a LERG effective date, is that at midnight local time, or some other time when calls start flowing differently? When do I switch my Metaswitch to passing calls via Sinch instead of the tandem? I have asked Sinch and my consultants similar questions, just as a kind of sanity check. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com Midwest Internet Exchange http://www.midwest-ix.com