# Debug Port on u4G-AP1100?

**URL:** <https://community.na.baicells.com/t/debug-port-on-u4g-ap1100/1834>\
**Category:** LTE\
**Created:** [October 27, 2022, 9:56am UTC](https://community.na.baicells.com/t/debug-port-on-u4g-ap1100/1834 "2022-10-27T09:56:14Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Nic](https://avatars.discourse-cdn.com/v4/letter/n/45deac/32.png) [@Nic](https://community.na.baicells.com/u/Nic)\
**Post date:** [October 27, 2022, 9:56am UTC](https://community.na.baicells.com/t/debug-port-on-u4g-ap1100/1834/1 "2022-10-27T09:56:14Z")

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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?