[39597] in North American Network Operators' Group
RE: Utilization of the redundant ring in SONET
daemon@ATHENA.MIT.EDU (Jeb R. Linton)
Tue Jul 17 23:35:52 2001
Reply-To: <jeblinton@corp.earthlink.net>
From: "Jeb R. Linton" <jeblinton@corp.earthlink.net>
To: "'Glen Turner'" <glen.turner@aarnet.edu.au>,
"'srihari varada'" <varada@txc.com>
Cc: <nanog@merit.edu>
Date: Tue, 17 Jul 2001 23:35:09 -0400
Message-ID: <006e01c10f3a$a5ef2e80$0100a8c0@omresjlinton>
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Errors-To: owner-nanog-outgoing@merit.edu
Actually, most of the largest holders of fiber in the U.S. have started to
offer unprotected SONET (and Lambda) service. Apparently, a few months ago
OC-48 and OC-192 speed Unprotected Wavelength services caught on like
wildfire, and customers started clamoring for lower speed Unprotected SONET
service.
I know of at least six of the biggest carriers here who offer it at OC-12,
and every one willing to guarantee a particular path - you just have to work
path diversity into your design. Some may even offer OC-3, though I haven't
checked that.
I can say that the price point on Unprotected SONET services is great - if
you're building redundancy into your physical topology anyway, you may not
need APS. The savings can be huge.
Likewise, I agree that there can be great cost savings for "Preemptable"
service, though I wouldn't use it for a mission-critical network. I only
know offhand of one major U.S. carrier who offers this, but I'm sure others
do, or will - it just makes sense. There are plenty of services that can
stand an occasional outage.
- Jeb
> -----Original Message-----
> From: Glen Turner
>
> <snip>
> What you can't buy is two unprotected diversely-routed
> circuits. You can simulate that by purchasing a
> protected circuit with a single customer interface
> and an extra traffic channel.
>
> <snip>
> --
> Glen Turner Network Engineer
> (08) 8303 3936 Australian Academic and Research Network
> glen.turner@aarnet.edu.au http://www.aarnet.edu.au/
> --
> The revolution will not be televised, it will be digitised
>
