Assuming your SMDR settings are correct, just go to maintenance commands and enter "logs read smdr all match <string>". In your case, I'd enter the extension number of the set you want to see inbound calls to, but it will show anything that matches that string, newest first. The SMDR log only stores the newest 20,000 records, so depending on call volume that could only be data from the last few hours or the last few months.