[10882] in North American Network Operators' Group
Re: BOOM! there goes WorldCom
daemon@ATHENA.MIT.EDU (Anthony Pardini)
Wed Jul 16 21:38:52 1997
Date: Wed, 16 Jul 1997 20:31:05 -0500 (CDT)
From: Anthony Pardini <apardini@cmpu.net>
To: Ron Buchalski <rbuchals@hotmail.com>
cc: Scott_Landman@zd.com, nathan@netrail.net, bnite@tremere.ios.com,
mpearson@games-online.com, nanog@merit.edu
In-Reply-To: <199707162321.QAA25142@f25.hotmail.com>
On Wed, 16 Jul 1997, Ron Buchalski wrote:
Sprint uses 4 ring sonet loops. Two backup and two active. This way
there is total capacity availiable in the event of a fiber cut. The data
just takes the reverse way around the loop on the backup path. I believe
they should have all the loops completed by the end of the year.
Tony
> The key is to go with multiple suppliers who can guarantee diverse
> routes. Carriers lease capacity from each other in some cases, so
> Sprint and MCI can give you circuits in the same physical fiber.
>
> Sprint and AT&T are implementing SONET protection switching which will
> reroute circuits around fiber cuts in 50ms. I don't know if they do it
> as a rule, or if you need to specify rerouting priority (and pay for
> it).
>
> It's interesting to look at a carrier's fiber map and compare it to a
> railroad map. You'll see MANY similarities. Railroad rights of way are
> the easiest areas to install fiber.
>
> -rb
>
>
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------------------------------------------------------------------------------
Tony Pardini
Systems Engineer
CompuNet, INC.
tony@cmpu.net
pgr 2145817737
