Is it a question? If yes, you should probably rephrase it because it doesn't make any sense. What is "client mode" and how is this all related to Traccar Client?
Someone used this device (LANTRIX T1800) related to trailing server
You posted it in Traccar Client forum. How is it related to the Android or iOS Client app?
This device would act as client, has to configure IP and port
Traccar Client is the name of a mobile app. This forum is exclusively for discussions related to that specific app. If you want to discuss any tracking device, you should use this forum:
As a client I would use LANTRIX T1800, and as a server I would use the Traccar Server
Sorry, I'll ask on devices
Someone could walk this device to use it client mode