i have visited a few naija forums and the Dlink DWA-125 has been hailed as the wifi adaptor of choice. Infact i thought it was the only one that can work. However while in Nairobi a friend bought me a cheap USB wifi adaptor shown below that works great on my SRT 4922.
View attachment 112614
once the wifi adapter is connected to the receiver go to 1.system setting 2. IP settings and if it is working you should be able to see wifi option
View attachment 112615
When you press the red button the device will scan any available wifi network and show the ip address. Remember DHCP is on.
Cheers.