[c-nsp] Ubr Docsis 2.0 Question

[Paul Stewart]

Following up...

I'm pretty sure you can run mixed-mode though with QPSK upstream on the 1.x
modems and then 64QAM modulation for Docsis 2.0 modems on the same
upstream/downstreams?  This would be ideal even with the 3.2Mhz channel size
until we get a chance to swap out hundreds of cable modems...

Thanks,

Paul


-----Original Message-----
From: Michel Renfer [mailto:michel.renfer at finecom.ch] 
Sent: Monday, March 05, 2007 10:39 AM
To: cisco-nsp at puck.nether.net
Cc: Paul Stewart
Subject: RE: [c-nsp] Ubr Docsis 2.0 Question

Hi Paul

No, of course not. Your DOCSIS 1.x (TDMA) modems will only support
channel-widths up to 3.2 MHz. If you want use the benefits of a 6.4 MHz
channel-width you need to use DOCSIS 2.0 modems (ATDMA).

cheers,
michel

> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net [mailto:cisco-nsp- 
> bounces at puck.nether.net] On Behalf Of Paul Stewart
> Sent: Monday, March 05, 2007 4:02 PM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Ubr Docsis 2.0 Question
> 
> Hi there...
> 
> I'm pretty sure there's some Ubr experts on here ;)
> 
> We are migrating a Cisco Ubr7114 up to Ubr7246VXR - so during this 
> we'll be changing to Docsis 2.0 ... this will also involve changing 
> the channel bandwidth from 3.2 to 6.4 Mhz....
> 
> My question is in regards to Docsis1.1 modems - if we change the 
> channel size to 6.4 is there a way to support modems that only work 
> with 3.2 channel width (therefore Docsis 1.x)??
> 
> Thanks in advance,
> 
> Paul
> 
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