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Author Topic: DIR-850L Slow Wireless with Comcast  (Read 3160 times)

cullen505

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DIR-850L Slow Wireless with Comcast
« on: November 10, 2014, 08:17:40 AM »

I've looked through several posts here and around the internet, and just want to see if I can find some help for a slow wireless, fast wired, connection issue.

First off, I have the Motorola SB6121 modem and the DIR-850L AC router.  Hardware on the router says A1 and FW is 1.10WW. Comcast Blast speed internet, which when wired gives me 58-60 MB on the Xfinity speed test site, and when wireless only 17-18 MB.

I'm not very tech savvy on the back ends of things like this, and am not sure how to proceed or if there is anything I can even do.  If there are any suggestions that might help me, I would be most appreciative for the knowledge.

Thanks.
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FurryNutz

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Re: DIR-850L Slow Wireless with Comcast
« Reply #1 on: November 10, 2014, 09:13:03 AM »

Link>Welcome!

  • What region are you located?
  • Has a Factory Reset been performed?
  • Was a Factory Reset performed before and after any firmware updates then set up from scratch?
>FW Update Process
  • Was the router working before any firmware updates?

Where was the v1.10WW received from? Did it come loaded on the router?
 

Wireless Configurations
Links>Wireless Installation Considerations and Managing Signal Congestion and Good Neighbour Policy
  • Ensure the default (dlink) SSID name is changed. Can be anything and not something that's already in use by any neighboring WiFi routers. Under Setup/Wireless/Manual.
  • What wireless modes are you using?
  • 2.4Ghz Routers only: Try single mode G or N or mixed G and N?
  • 2.4Ghz and 5Ghz routers: Try single mode G or N or mixed G and N on 2.4Ghz and single mode N or AC on 5Ghz?
  • Channel Width set for Auto 20/40Mhz or try 20Mhz only.
  • Try setting a manual Channel to a open or unused channel. 1, 6 or 11. 11 for single mode N if the channel is clear. 13 for EU regions. Try channel 48 or 149 on 5Ghz.
  • What security mode are you using? Preferred security is WPA-Personal. WPA2/AES Only. Some WiFi adapters don't support AES, so you might want to try TPIK only or Auto TPIK and AES.
  • What wireless devices do you have connected?
  • Ensure any devices with WiFi adapter drivers are updated.
  • Any 2.4Ghz or 5Ghz cordless house phones or WiFi APs near by?
  • Any other WiFi routers in the area? Link> Use InSSIDer to find out. How many? Use v3, its free.
  • If you have any of these options, Try turning OFF or ON Short GI, WLAN Partition, Extra Wireless Protection and HT 20/40 Co-existence if you have it. Also testing with HT20/40Mhz Co-existence enabled will impact results as well. I prefer to use this option OFF. Recommended settings are default. Under Advanced/Advanced Wireless.


Router Placement
Forum User - "Well I feel really dumb. After moving the router away from other electronic devices my speeds are back to normal. Just a heads up for anyone experiencing slow speeds, you might want to move it away from other electronics and see if that helps."
3-6' feet minimum safe distance between devices.
Placement on main level floor and central in the building and WELL ventilated is preferred. Not in basements or closets as building materials, or near by electronics devices could interfere or hinder good signal propagation.
http://www.smallnetbuilder.com/wireless/wireless-basics/31083-smallnetbuilders-wireless-faq-the-essentials
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