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@gmail.com [mailto:mpetach@gmail.com] On Behalf Of Matthew Petach Sent: Saturday, March 05, 2011 1:48 PM To: frnkblk@iname.com Cc: Jason LeBlanc; outages@outages.org Subject: Re: [outages] Major Fiber Cut in Miami
On Sat, Mar 5, 2011 at 9:57 AM, Frank Bulk <frnkblk@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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