Hello,ive got a plc 5 reading data from an slc5/03 40 miles up the river. It is done using two us robotics modems and a pstn telephone line both connected serial to each plc. There was a lightning strike frying both modems and no documentation has been left onsite to reconfigure i.e at commands, im going round in circles with this, can anyone shed any light on how to set up both ends?