We do this currently with PA-MC-2T3+s and Carrier Access Corp DS3
muxes.
http://www.carrieraccess.com/CAC.products_wb.family.htm
Turns out pretty cost effective.
I can definitely confirm that they work in "reverse". I don't think
they have an OC3 interface, atleast an optical one. I don't know who
does, either.
Dan Hollis wrote:
> On Fri, 9 Feb 2001, Martin, Christian wrote:
> > > We are an ISP selling DS1s and would like to get the best DS1
> > > density from our Ciscos, ATM muxing OC3 into DS1s looks like the best
> > > way to do this.
> > If you are trying to avoid distance costs, you should go with Frame Relay
> > for your customer connections.
>
> No no no!
>
> We want to mux on *OUR* end.
>
> We have a zillion ciscos for a zillion discrete DS1's, spread out in a
> zillion racks.
>
> We would like to get those DS1s moved into the least rack space possible.
> The best way I can see to do this is muxing all the DS1s on our side with
> a nice DS1->OC3 mux and feeding that into a cisco. Like so:
>
> .------- Our facilities ---------.
> | |
> Telco -> | DS1 -- +---+ +-----+ |
> Telco -> | DS1 -- |OC3| -- OC3 -- |Cisco| |
> Telco -> | DS1 -- |Mux| +-----+ |
> Telco -> | DS1 -- +---+ |
> `--------------------------------'
>
> And no, the telco can't provide the DS1's over DS3 or OC3. Don't ask.
>
> > If you would like to terminate PTP or channelized DS1s into an OC3 router
> > port, you will have to wait. Cisco will be shipping a 2 port CHOC3 LC for
> > the GSR which should allow you to extract 84 T1s from a given OC3, but I
> > don't know when. Amber Networks and Juniper will likeley be offering
> > similar products. YMMV. Finally, you will need a Special Assembly from the
> > LEC to get VT1.5 drops from an OC3 - a considerable process in and of
> > itself. If you want to do channelized service, go with CT3. If you own a
> > DACS - and I mean a big sucker like the Alcatel 1631, then you can play with
> > all sorts of channelization.
>
> There isnt a simple basic standalone CT3->DS1 mux that can be interfaced
> to a cisco? Eg a box with T3 on one side and a bunch of DS1 ports on the
> other, and no other silliness?
>
> -Dan
>
-- nicholas harteau nrh@ikami.com
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