My office infrastructure is under 192.168.1.2-255 range with gateway 192.168.1.1 and subnet 255.255.255.0. I have a wifi router in the network as well. But it makes its own network via dhcp of 192.168.3.1 series. Its lan ip is set to 192.168.1.77. Now via my firewall at 192.168.1.1 i can see activity of only the wired wifi router and cannot actually see the wireless devices and what activity they are doing. Is there any way i can get the wireless devices in the 192.168.1.x network?
You don't want to use your device as a router, you want to use it as a bridge.
What you want to do is disable DHCP and disable NAT (set it to transparent bridge), but I don't think your wireless device supports that configuration. I looked at the manual and couldn't find it . It could be that they have renamed the feature to something, or I missed it.
If you are comfortable installing custom firmware on your device you can install DDWRT to get additional features.