From: Scott Landman <Scott_Landman@zd.com>
If fibers being cut is the culprit here, does going with a supplier like Qwest make sense because their fibers are running down railroad right of ways and, therefore, should be less succeptible to a backhoe digging where it shouldn't be? Or are you looking at other, more secure mediums for the bulk of your traffic?
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 ______________________________________________________ Get Your Private, Free Email at http://www.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
On Wed, Jul 16, 1997 at 04:21:48PM -0800, Ron Buchalski wrote:
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.
Actually, in light of the conversation we've been having about carriers flagging routes that are part of diversity pairs, what happens is you get two circuits for such service from separate carriers. Would they have any way of avoiding co-lo'ing the circuits? Is there an intercompany tag for circuit paths? Cheers, -- jra -- Jay R. Ashworth jra@baylink.com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "People propose, science studies, technology Tampa Bay, Florida conforms." -- Dr. Don Norman +1 813 790 7592
participants (3)
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Anthony Pardini -
Jay R. Ashworth -
Ron Buchalski