[11208] in North American Network Operators' Group
Re: Terminating many T1's
daemon@ATHENA.MIT.EDU (Nathan Stratton)
Tue Jul 22 21:43:00 1997
Date: Tue, 22 Jul 1997 21:37:45 +0000 (GMT)
From: Nathan Stratton <nathan@netrail.net>
To: "Ben Kirkpatrick, ELI" <blkirk@float.eli.net>
cc: Stephen Balbach <stephen@clark.net>, nanog@merit.edu
In-Reply-To: <Pine.GSO.3.95.970722171742.6150G-100000@float.eli.net>
On Tue, 22 Jul 1997, Ben Kirkpatrick, ELI wrote:
> On Tue, 22 Jul 1997, Stephen Balbach wrote:
> > 1. Cisco serial ports and rack CSU/DSU's. Exspensive. Lot of space.
> Cisco has a channelized DS3 card. Wire once to dacs and provision in
> software only.
>
> > 2. MAX TNT for T1's connecting to a backbone Cisco. Theoretically up to 140
> > T1's in 1 small box with built-in CSU/DSU's. Unproven?
Vary.
> > 3. Cascade. Similair to TNT approach, very exspensive untill you reach
> > 70+ T1's in a chassis.
> Cascade has a channelized DS3 card as well. Good for combining many
> customers who have a physical T1. Split out at the dacs.
Yes tend to be big bucks, but is not that bad if you have many T1s to
terminate.
> > 4. Chanellized DS3. Don't know anything about it - can MFS provide circuits
> > this way via a DS3 handoff? No CSU/DSU required? Any other costs/issues?
> Channelized DS3 stuff only seems to be useful for putting mulitple
> customers on a single physical circuit. You need to be able to break it
> out to the DS1 level for each customer. Perhaps MFS, PacBell, etc can do
> this? It's probably just a matter of them defining that "product".
> (I.E. Feed MFS a DS3 and they give a T1 to each of your customers.)
Yes, the Cascade and Cisco CT3 have a built in M13 built in. All you need
to do is order a DS3 HUB into the providers you want. What we do is run a
few DS3s into the COs in our area. You may want to run a DS3 into a few
telcos also. They can you get the best price for your customers.
DS3 HUBs can be a little on the high side, but they more then pay for
themselves. Say you run a DS3 HUB into Bell Atlantic, you spend around 3K
for the HUB. When you order your customers T1s you only order a 1/2
channel term. So you can more then pay for it with around 9 - 13 DS1s.
Nathan Stratton President, NetRail,Inc.
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