It is used to debug device when you forgot the ssh and GUI password or device can not boot up. Console parameter,115200 8 n 1 1. Find one cable same as cicso console line 2.Download the client putty,try to login The COM3 you can find from the ...
At first pls try to confirm your connection is OK.pls follow the picture in the attachment .all ex16 connect to switch with WAN Port. Then follow the manual in the attachment to do .