@18_Campus 

Hi,  I might need your help to get more details:

1. Since you mentioned the 3CX phone system stopped working 2 weeks ago, was there any change recently, like a firmware upgrade or phone system upgrade?

2. Did you use a web client or Windows Desktop App?

3. Since you mentioned the cable connection on the laptop is working, so did you mean 3CX is not working properly only on the wireless network of Deco?

4. When you said 3CX was not working, did you mean you could not register for the phone service anymore, or the video call quality is not so good, like freezing or shuttering?

5. As for the local IP address, which IP it is, the IP of the laptop, Deco LAN IP(192.168.68.1), or internet IPV4 IP on the Deco?

Thank you very much and wait for your reply.