Trying to get my router to allow 802.11b

@flatlander3​ I have the tg3482g router from xfinity. 

@flatlander3​ it won't let me adjust any settings for the router, it only supports 802.11 g/n, according to the setting. now another question if i were to add a separate router would i technically be able to run 802.11b frequency if the router has the ability to which most on the market do? or would i have to swap the modem as well? 

Sure.  I saw a discontinued Ethernet router at Menards for $20.  You gotta look at the manual real quick to see if the Ethernet router can be setup as an access point, but many/most can.  Should tell you what 802.11 version it speaks on the box. Maybe features too.  A straight Access Point will work too.  You might be able to find a really cheap 802.11b one these days.

Easy way is to disable the Ethernet Router's DHCP server, and set DHCP forwarding to your gateway (10.0.0.1).  That way requests that connect to the WiFi on your 802.11b router, are handled by your gateway and everything ends up on the same network.  Set a different WiFi SSID for it of course so you can tell what you are connecting to. 

Pity about the firmware.  Usually there's a b/g/n option, or a b/g option.  That must have been Xfinity crippled.

I'd add: even if the Ethernet router can't be setup as an access point, you can still use it.  It's just that it will have it's own network inside the other network (double nat).  Things on that can still see the outside network and internet, but things on your gateway network can't see devices hooked up to the WiFi network on the 802.11b router. 

@EG​ the link does show it supports it but it will not let me adjust it, xfinity controls that section and there's nothing i can do. Thank you for the info