I am working on a Definity that does not answer with modem tone on the aux port. The SAT is dead as well, so I would like to connect an external modem. The documentation says to use the data port on the backplane behind the processor board, but there is an old SMDR system plugged into that port. If I disconnect the SMDR and plug the Intuity US Robotics modem into that same port, should it work? Or are there other connection options? Thanks in advance.