by 262
The old HBDED at MP SX1013 has been replaced,(its block house is in the way of high bridge approach).New detector at MP SX1009 reads the message twice,the first time giving the railroad id,then saying its a detector,(as if we could not identify that cg voice anywhere)then the MP location and track number.then it reads the first message again along with axle count,and no defects,repeat no defects,link number,(it then reads a three digit number).My question is what is this link number,it seems to be a diffrent number each time I catch it ?