[c-ubr] uBR-7223 Question

[James Galliford]

I'd say that it might be a stretch with a 7223.  12.1 software is  
buggy and as far I know is eos.  12.2 software will crush a Npe-225  
with that many modems.

Might want to look at a 7225vxr instead.

Sent from my iPhone

On Mar 26, 2008, at 15:37, Friedrich Lobenstock <fl at fl.priv.at> wrote:

> Hi!
>
> René-Roger Ziesack wrote on 26/03/08 18:50 MET:
>> the depends on some parameters - which bandwidth do you plan per  
>> user?
>> What kind of services do you plan to provide (internet only, voice  
>> services)?
>> How does you network look like (SNR, ingress)?
>> In general; what you described is more a minimal configuration  
>> without any redundancy.
>
> Attached two load and one traffic graphs of almost the same UBR with  
> currently 406 installed modems.
>
> Setup:
>  uBR7223 with:
>  1x NPE-225 (128M RAM)
>  1x I/O-FE
>  1x PA-FE-TX
>  1x uBR-MC16S (uBR-MC16C with Spectrum Analyzer)
>
> To be realistic with 4000 installed modems you probably need at  
> least 50 from your upstream ISP.
>
> One uBR-MC16C can realistically do 20MBit (30Mbit theoretically) in  
> the downstream - tested it myself.
>
> At least a uBR7246 VXR with NPE-400 and 2x uBR-MC28C would be what I  
> would choose for in your case.
>
> But I'm not really qualified as I haven't gone there myself yet.
>
> -- 
> MfG / Regards
> Friedrich Lobenstock
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