[outages] Major Fiber Cut in Miami

[Frank Bulk]

While you're technically correct, it's not how it's commonly implemented.
Well, maybe it's more common than I was aware. =)  It's not how regional and
state fiber networks in our neck of the woods do it.

Frank

-----Original Message-----
From: Owen DeLong [mailto:owen at delong.com] 
Sent: Saturday, March 05, 2011 2:07 PM
To: frnkblk at iname.com
Cc: 'Matthew Petach'; outages at outages.org
Subject: Re: [outages] Major Fiber Cut in Miami

Not really...

A SONET Ring can provision circuits with or without a protect path. Circuits
which are built with a protect path are not affected by a single cut.
Circuits
which are built without a protect path can be affected by a single cut, but,
leave the other side of the ring available to other circuits.

It's not uncommon for a carrier to (and quite reasonably so) charge more
for a protected circuit.

This configuration can be done on a per-circuit basis. The SONET itself
is still a ring, whether any particular circuit on that ring is groomed for
protection or not.

Owen

On Mar 5, 2011, at 11:55 AM, Frank Bulk wrote:

> That defies every common understanding of "SONET ring".  Better to call it
> "linear STS connection" then. =)
> 
> Frank
> 
> -----Original Message-----
> From: mpetach at gmail.com [mailto:mpetach at gmail.com] On Behalf Of Matthew
> Petach
> Sent: Saturday, March 05, 2011 1:48 PM
> To: frnkblk at iname.com
> Cc: Jason LeBlanc; outages at outages.org
> Subject: Re: [outages] Major Fiber Cut in Miami
> 
> On Sat, Mar 5, 2011 at 9:57 AM, Frank Bulk <frnkblk at iname.com> wrote:
>> If it really was SONET *ring*, how could a fiber cut cause an outage?
>> 
>> Frank
> 
> Just because it's a ring doesn't mean it was configured for protection...
> 
> Matt
> 
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