Debug Port on u4G-AP1100?

Hi everyone, I’m a technical engineer who is working on LTE-U eNB (AP1100).
Long story short: I modified IP addresses (LAN and WAN) and now I’m no more able to ping anything…
I’m sure about the configuration I’ve applied to.
So, since I cannot use ethernet connectivity either on copper port or fiber (connecting an SFP ethernet), I found, beneath a small sticker, a type-C port. I guess this is useful to debug but I don’t know how to use it. Perhaps, some driver is needed or a particular cable or a specific device to connect to…
Anyone of you with same issue? Any suggestion?