[aclug-L] Re: Cable modem

[John Goerzen <jgoerzen@xxxxxxxxxxxx>]

On Fri, Apr 25, 2003 at 08:55:55AM -0500, flimzy@xxxxxxxxxx wrote:
> I've done some reading on the topic, and have determined that some modems
> are "uncappable"... I guess firmware bugs (fetaures?) allow the user to
> bypass ISP-imposed bandwidth caps.  Although I of course would NEVER take
> advantage of such a bug (right?), is that something that can effect Cox
> service?  And if so... does anyone recommend a specific modem with that
> feature-bug? :)

Many can be uncappable.  The modem uses DOCSIS (a combination of DHCP, TFTP,
and other protocols) to configure itself when it turns on.  Some will look
for these files on the local Ethernet port as well, hence the problem. 
People can supply fake files.

However, uncapping it is obviously detectable by network admins, and is a
quick way to get your account closed -- or worse.  Some people have even
been arrested for it under "theft of service" provisions.

> The specific model I've been considering is a Motorola SURFboard SB5100. 

I've had good luck with the Surfboard in Indianapolis.  I've had bad luck
with Toshibas, and the Comcast people reported similar experiences from
their other customers.

> But... if an old used modem will be just as good, I'd be happy to save the
> $50 and get something cheap off of eBay.
> So any advice will be appreciated.

Certain modems have more trouble acquiring signal when the signal conditions
are less than ideal (and since this is cable, that is "most of the time"
<g>)  Surprisingly enough, despite having no moving parts, some also have a
high failure rate.  So I'd advise against just buying the cheapest one off
ebay.  And avoid Toshiba.

-- John
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