802.11n speed drops to 802.11g rate

Posted on 2007-10-08
Last Modified: 2013-12-21
I tried a Belking "pre"N wireless router with my Toshina Tecr A9 laptop which has a 802.11n card.
If I changed settings, channels, etc, I would get the higher connectivity (130 Mbps or so) for a few minutes, but it would eventually fall back to the 802.11g (54 Mbps) speed.
I am in the same room as the router, so interference shouldn't be the issue.
I then tried the same with an Apple AirPort Extreme.  Same issue.
Since there are other computers connecting at the 802.11g speed because of their hardware, does that knock all connection speeds down to the slower rate?
Question by:TimLaL
    LVL 87

    Accepted Solution

    Normally a router will drop to the speed of the slowest active connection for all other devices attached to it. Modern routers, mainly those that have multiple aerials, can keep up the high speed even if a low speed device has connected. Also, "n" mode is at the moment no proper standard yet. This means that each manufacturer has it's own standard and therefore if you connect a Wireless NIC which is capable of "n" speeds to an access point that can also run at "n" speeds, you usually will get compatibility problems if they are from different manufacturers, and that can cause the speed to drop too. Then as a further drawback, many routers that boast 802.11n don't yet have the best firmware, so they often just don't function like they should. Sometimes a firmware update can help.

    Author Comment

    Sorry it's been so long since I've responded.
    The AirPort and my laptop have become friendly.  The issue seemed to heal itself and the connection speed shown is 130 MBps consistently.  I don' t know of anything I did.  
    I can say that the AirPort and its software have been very easy to work with.  No dropped connections.  Great service as both a router and print server.  I'm impressed.  
    Thanks for your feedback.

    Author Closing Comment

    Review my last comment.  
    Everything has been working great - even after Comcast "upgraded" my cable modem - disconnected the router- then left with the network down.  

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