Ive never used fast step, had to manually set mine up. (cisco 765). If the CH1 is always on and not blinking then it has made an ISDN connection somewhere, when it is blinking it is in the process of making a call. Make sure that the consol connection is the right settings (blue cable),9600, 8, none , 2 and none. It should have serial connection on both ends? The 765 has a BRI S/T connection so slightly different from yours (no NT1 light). Provided of course you haven't already got rid of the Cisco. I'm only new to Cisco and ISDN but I have managed to split my home network and connected them via ISDN sim with Cisco 765 and Cisco 2523.