-----Original Message----- From: owner-nanog@merit.edu [mailto:owner-nanog@merit.edu]On Behalf Of Valdis.Kletnieks@vt.edu Sent: Thursday, April 14, 2005 4:35 PM To: Luke Youngblood Cc: 'Dan Lockwood'; nanog@merit.edu Subject: Re: Anyone familiar with the SBC product lingo?

On Thu, 14 Apr 2005 16:15:41 EDT, Luke Youngblood said:

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SONET simply means you are on a Sonet ring: Two redundant

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the central office. If someone gets a little crazy with a backhoe your line is guaranteed to stay up (ask about SLAs, and make sure

connections to they will refund

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part of your monthly bill if you have an outage). That's why it costs over twice as much.

And remember to ask questions - make sure they've actually got the two connections routed differently. Remember that if the backhoe hits the conduit, *all* the fiber pairs go - and if both runs were in the same conduit, you're still dead....

(Anybody here *NOT* seen cases where the 2 fibers leave the building on opposite sides, go down different streets - and rejoin 2 miles down the way because there's only one convenient bridge/tunnel/etc over the river, or similar?)

It's rare that the pairs *don't leave the building in a lateral to the loop. Once you're into the metro, you're usually okay, but yes, you need to check. Most buildings only have 1 zero manhole so it's not feasible to get a second diversified lateral and it doesnt make sense to lease a second lateral on the same pathway. -M<\\