A DSL splitter providing test access to an interconnected subscriber loop and method are disclosed. Second data packets are forwarded to a second port that is associated with a second domain. A computer-executable program is then generated based on the trained pattern classifier, and the program is installed and executed on a subscribed identity module of the terminal. The physician may then rotate the piercing tool within the catheter and extend the piercing tool through one opening at a time, without rotating the catheter, until the physician chooses an opening that is properly aimed at the second blood vessel.