I have found some information that may be helpful in my Maintenance Manuals. I have included the Manual number so you can go to the Aavaya site and download the documents. Then use the index and look for List Trace command. Logically looking at the errors, It looks like you dialed a number trying to conference or transfer and the call went to intercept. I think all the letters and numbers are hexi-decimal addresses.
Release 1.3
555-233-143