maxDNA DCS - Data not updating when Extending LAN over Wireless Router

in maxDNA DCS network, the DPU (processors) are at distributed locations. One location (offsite) is very far from main control room, so it is connected through Optical fiber. But due to expansion works in the areas through which the cable has been laid, the link remains broken almost all the time.

Wireless routers which were already installed for CCTV camera monitoring between these two places were used.

After connecting at switch, the offsite location switch and the DPU are accessible from control room end (through ping command). But data is not updating when maxRuntime is started. DPU is not accessible. The same DPU when connected to the fiber link, it is accessible.

Can any body help me resolve this?