CallPath call STLMON (Monitor) - unknown problem
STLMON failed because of an unexpected or unknown error. The CallPath return code and the parameters passed to and from the call are printed in the error.
STLMON sets up CallPath monitors on the Blueworx Voice Response channel during trunk initialization.
If this problem occurs frequently, trace it and contact Blueworx Support.
White (error_id = 20501)
Log, System Monitor