North American Network Operators Group
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Re: Terminating many T1's

  • From: Nathan Stratton
  • Date: Tue Jul 22 22:03:08 1997 
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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