North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: BOOM! there goes WorldCom
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 > > > ______________________________________________________ > Get Your Private, Free Email at http://www.hotmail.com > ------------------------------------------------------------------------------ Tony Pardini Systems Engineer CompuNet, INC. [email protected] pgr 2145817737
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