Date: Wed, 30 May 2001 18:59:35 -0400 From: Bill Vermillion <bill@wjv.com> To: Deepak Jain <deepak@ai.net> Cc: bv@wjv.com, freebsd-isp@FreeBSD.ORG Subject: Re: OC48 interface Message-ID: <20010530185935.A967@wjv.com> In-Reply-To: <GPEOJKGHAMKFIOMAGMDIIECECPAA.deepak@ai.net>; from deepak@ai.net on Wed, May 30, 2001 at 06:28:19PM -0400 References: <20010530181630.A501@wjv.com> <GPEOJKGHAMKFIOMAGMDIIECECPAA.deepak@ai.net>
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On Wed, May 30, 2001 at 06:28:19PM -0400, Deepak Jain thus sprach: > > On Wed, May 30, 2001 at 05:36:14PM -0400, Deepak Jain thus sprach: > > SONET is a physical layer protocol that (when implemented) can > > provide switching around cut fiber in sub milliseconds. > > Nice when it works. We lost our DS3 for about 18 hours 2 weeks > ago. Seventeen OC-48 links were cut. When we asked the about the > self-healing, they said, normally it would, but not with the many > gone. > This happens when (if actually implemented as a ring), the > Service and Protect are in the same fiber run. Sort of pointless > with physical cuts. That is a problem with the user, not the > technology. > -- > > They couldn't get permission to dig up the road so that had to > patch around, that made the repair take twice as long. And two > days later, before they could the patched section buried, a truck > took the same 17 out one more time. They were running overhead. > > Local politics I assume kept them from doing it the right way the > first time. > You must be dealing with a CLEC or an IXC. RBOCs can open > emergency permits without prior authorization. They are considered > a utility and a vital public service. Competitors are not. I suspect you may have heard of them. Fairly large. One of the Baby Bells that covers the 9 southern states - Bell South. But digging up hiways in Orlando with our miserable traffic problem is not something the local governments are going to permit in daylight hours. They could not dig up the street - they had to go overhead. Our DS3 was in that link from BS and I guess there are about 20 feet or more of racks with Lucent Max units in them for AOL. My guesstimate is about 35,000 modems. I have no idea, but I suspect 10-15K AOL users lost connectivity. About 1/2 of those are back-hauled in from another city. There is so much contruction going on in this area fibre cuts are becoming a way of life. OTOH there is more fiber going into the ground than I can any use for. Sprint ran some across the street - about 40 feet away - just two months ago. Then two weeks ago I see 4 or 5 more conduits going in the ground. That was an AT&T run and talking with the crew a pedestal is coming soon. And this is in a residential area and Bell South ran through the lawn in front of my house on this side of the street 18 months ago. Be thankful that you don't have to deal with two major carriers who have exclusive franchies in adjoing parts of the metro area. Pure hell. -- Bill Vermillion - bv @ wjv . com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isp" in the body of the message
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