I should mention that if you're looking to terminate a _lot_ of T1s
(>500) in a very small amount of rackspace (3U), you might want to look
at a Juniper M5/M10 and thier four port channelized DS3 card. It would
only really make sense if you're getting the T1 provider to handoff on
CT3 though.
Also I believe the Cisco 15100 (?) is a very high density T1 solution,
but I am not familiar with the product, though I have heard mixed
reviews.
nicholas harteau wrote:
>
> the math works out like this:
> 3x PA-MC-2T3+ == 6 channelized DS3s == 168 T1s
> which is 3U for the 7206
> another 6U is needed for the channel banks to mux the DS3s. Assuming
> you have some rackspace to burn on patch panels and power supplies (I
> mount them to the back rails in cabinets, with the power supplies below
> the useful rail space), that's 168 T1s in 9U, or 18 T1s/U
>
> with the PA-MC-8T approach you get
> 6x PA-MC-8T1 == 48 T1s
> which is 3U and 3U only, which is 16 T1s/U
>
> Not that bad. You have to weigh the management advantage of the higher
> density box versus the added points of failure of the muxes. Also, I
> would guess that with an NPE400, assuming you weren't doing sub-rate
> ds1s you could fit more than 3 PA-MC-2T3s into a VXR safely.
>
> one other note:
>
> the former approach (to get 168 T1s)
> VXR x1 = $17000
> PA-MC-2T3+ x3 = $99000
> CAC WB28 x6 = $18000
> -------------------------
> $134000 $797.61/T1
>
>
>
> the latter approach: (to get 144 T1s)
> VXR x3 = $51000
> PA-MC-8T1 x18 = $208800
> -------------------------
> $259800 $1804.16/T1
>
> making a little more sense now?
> these are list prices, of course.
>
> Also, I've gone the PA-MC-8T route, and it turns into a wiring
> nightmare, let me tell you.
>
> Paolo Bevilacqua wrote:
> > At 03:06 PM 2/9/01 -0800, Dan Hollis wrote:
> > >On Fri, 9 Feb 2001, Paolo Bevilacqua wrote:
> > > > But, a single 7200 with 48 T1s takes three RU, that's about
> > > 300%
> > > > less space for up to 48 T1s compared to the above.
> > >
> > >More than 48 T1s is needed.
> >
> > I'm not aware of any router product that can do better than 48
> > T! w/ R45 in three RU.
> >
> > >-Dan
> >
>
> --
> nicholas harteau
> nrh@ikami.com
>
-- nicholas harteau nrh@ikami.com
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