xlimitx at gmail
Mar 30, 2008, 6:03 AM
Post #5 of 5
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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> 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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