hi ,
normally on a digiport server , you have a management port ( depending on what model you have ) its normally the 1st port on the digi box
so if you have a terminal or even a PC with emualation software e.g. reflections,putty etc.. you set the terminal / pc serial port ( to 9600 , 8 1 NONE) and connect it to the digibox , if successfull you'll get the didbox
login screen
( you'll have to make sure you have the correct cable )
HTH