A quick look at the first few google hits for DOCSIS says that all four versions are fully forward and backward compatible.<br><br><div class="gmail_quote">On Sat, Oct 2, 2010 at 2:25 PM, Michael Trausch <span dir="ltr"><<a href="mailto:mike@trausch.us">mike@trausch.us</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">Comcast is gradually migrating their entire network to do DOCSIS 3, as<br>
well as IPv6. I'd suspect that one of the reasons that they want<br>
newer modems on the network is the ability to acquire IPv6 addresses<br>
on the Comcast network. Their trials are going well, from what I have<br>
seen.<br>
<br>
I've been on DOCSIS 3 service since just before the start of 2010, and<br>
I have to say that I am really liking it. I am not getting the 70Mbps<br>
that I used to, as that was something that I got as part of the trial<br>
that we were in when I was in Dunwoody, but I have 30Mbps. I could<br>
get the faster one, but I'm not willing to pay that much extra. :-)<br>
<br>
In any case, I'd recommend getting a new DOCSIS 3 modem anyway. The<br>
SB5100 series is getting pretty dated...<br>
<br>
--- Mike<br>
<div><div></div><div class="h5"><br>
On Sat, Oct 2, 2010 at 1:43 PM, Kaerka Phillips <<a href="mailto:kbphillips80@gmail.com">kbphillips80@gmail.com</a>> wrote:<br>
> I wonder if that is just the Atl market which Comcast is taking to DOCSIS<br>
> 3.0 - I use Comcast in the DC area and also have a SB5100 - a SB5101 in my<br>
> case.<br>
><br>
> On Sat, Oct 2, 2010 at 1:12 PM, Paul Cartwright <<a href="mailto:ale@pcartwright.com">ale@pcartwright.com</a>> wrote:<br>
>><br>
>> On Sat October 2 2010, Lightner, Jeff wrote:<br>
>> > I don’t think Comcast is just trying to get me to lease a new modem as<br>
>> > the<br>
>> > letter says I can buy one at a retailer. I’ve already priced<br>
>> > replacements<br>
>> > that do DOCSIS 3.0 (e.g. SB6120) that are listed as compatible on their<br>
>> > site. However, without them being able to give me good information I’m<br>
>> > loathe to do that because they can’t tell me why the current modem isn’t<br>
>> > adequate or why there is a need for a change on Oct 12th in the first<br>
>> > place.<br>
>><br>
>> wouldn't you want a modem that can do DOCSIS 3.0 ? it says up to 4 times<br>
>> faster than DOCSIS 2.0...<br>
>> I see one on Amazon for $80:<br>
>><br>
>> Motorola SB6120 SURFboard DOCSIS 3.0 eXtreme Broadband Cable Modem by<br>
>> Motorola<br>
>> Buy new: $80.73<br>
>><br>
>> <a href="http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=SB6120&x=0&y=0" target="_blank">http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=SB6120&x=0&y=0</a><br>
>><br>
>> --<br>
>> Paul Cartwright<br>
>> Registered Linux user # 367800<br>
>> Registered Ubuntu User #12459<br>
>> <a href="http://usdebtclock.org/" target="_blank">http://usdebtclock.org/</a><br>
>><br>
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