D-Link Forums
		The Graveyard - Products No Longer Supported => Routers / COVR => DIR-855  => Topic started by: erd on March 23, 2010, 11:46:29 PM
		
			
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				hi
i tried using dlink router dir 855 on my cable service (docsis 3 technology) and i am only getting 25 mbps for my download which is half of the speed if i use directly the modem supplied by my isp which is 50 mbps . same also with my upload speed 2.5mbps instead of 5 mbps.
is dir 855 compatible with my cable modem provided by my isp? which is an smc (SMCD3GN)
thanks
			 
			
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				This is more than likely because your cable provider is cheating and using a dual connection to provide you your full speed.  My cable provider does the same and I'm using an SMC Docsis 3.0 modem.  The dual connection definitely is not a very good solution either.  I ended up downgrading to the 2.5MB service with the 1MB up.  In doing that, I see closer to 3MB down and 1.2MB up because of similar issues that I relate to the way the cable companies deliver the speed.  
			
 
			
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				whats your QoS setup?  Is dynamic frag on? Do you input your own manual uplink speed? (Very important).  Uplink speed basically creates a bandwidth pipe regardless of actual bandwidth.  Could you give us your settings?