Yes, the "BUSY STUDY"/"TRAFFIC STUDY", a very useful tool! But most telcos ignore its existence. They have been around as long as the Bell System. If you have requested one and have had no results escalate the request to a supervisor level and insist on a paper copy! The Bell companies never charged for them. I don't know about the independent Telcos. They can be set up in different ways, all real CO switches have this capability to provide this type of data. When I worked for the Paging company I had scheduled Busy Studies for all our end office DID trunk groups for the 3rd week of the month 7/24. It would provide peg counts, overflow counts, and maintenance counts or time value for trunks out-of-service. I found these very useful.
Paetec being an exception, I wonder if any of the CLECs even know what they are!!
Be very careful in your evaluation and choice of provider and ask ALL the questions and verify the answers you get from them. You have to be critical, because it's your business!
....JIM....