On Sat, Feb 07, 2004 at 10:49:08PM -0600, Jack Ungerleider wrote:
> 
> The way I understood it from the guy who did the cable check for my cable 
> modem in Duluth was that there are optimal signal voltage levels for the data 
> channels. If the signal is outside that level the modem can have trouble. To 
> me that implies the possibility of sub-optimal performance. 

David is correct. Signal levels can cause issues but it generally ends up
causing loss of block sync (connection). A noisy signal can cause the 
occasional retransmission but you have to realize that it's linking up at 
approximately 57mbit downstream (256 QAM), a noisy 57mbit link will still 
provide you with your allocated 3mbit.

Allowing cable modems with very poor signal levels to re-sync at a lower
bitrate would slow down the rest of the network.

-- 
Matthew S. Hallacy                            FUBAR, LART, BOFH Certified
http://www.poptix.net                           GPG public key 0x01938203

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