I have DSL-2640T router. I can't use the default ip address of that router ie. 192.168.1.1. I have a laptop. I want to join the laptop in my office through wireless. I don't know to make that router wireless. I want make wiress through our network which is running the same gateway ie. 192.168.1.1. I want to make that router ip address like 192.168.11.1(for example). My office network start from 192.168.1.1.