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When A Cable Dies
highpingbastard writes: "Staff at Australian telecommunications carrier Telstra are going to hold a decomissioning ceremony for a 25-year-old voice and data cable spanning between Australia and New Zealand that died yesterday. Telstra was still using the 2Mbps cable as a backup circuit up until the time it was cut, probably by a ship's anchor. In general, undersea cables have a 25-year life span. A chance for all involved in the cable's long life to get closure. Australia's fastest looped network to the U.S., the (flash animation warning) Southern Cross Network Cable, also went down for 15 hours after it was snagged at the same time. It is supposed to have a 99.999 per cent network availability, or downtime amounting to 50 minutes over 10 years. Doh! That's 300 years' worth in one hit by my calculation ..."
Gotta love how the Southerncross website information content is zip if you dont bother with flash.
Is it because they want to increase their pipe usage by feeding lots of useless crap over it?
TimC.
The Southern Cross Cable is completely redundant, so they are justified in making their claims about uptime, but by some strange twist of fate, the second cable running out of Sydney was down for maintainance at the time of the break. The broken cable is still down, and they simply brought the second cable back up to fix everything. In any case, it didn't stop Internet connectivity for Australian users as some posters are suggesting; ISPs routed traffic onto other cable/satellite links, and while it was slower for users affected, it wasn't like Australia suddenly became broken off from the rest of the world.
If you're interested about how they lay and fix these types of cable out at sea, you should read this great article from Wired in 19996 by Neal Stephenson. It takes a while to read, but it covers everything from the development of the technology, to installing and maintaining it, how it's all linked up, and the economics behind it.
When the cable is in shallow water (several hundred metres) a plow is dragged infront of the cable as it is being layed.
It then lies in a shallow trench which later fills up with sand to offer some protection. Not enough to stop a ships anchor by the looks. Once the water gets deeper though it has to be layed straight on the bottom.
"Do you think we could wipe out world hunger forever if scientists figured out how to make AOL's Free CD's edible?"-
What, me worry?
Australian Police are asking for public help in locating a man seen clinging to a New Zealand-registered rowboat, with a large propane cylinder hanging off the stern, trailing smoke and flames as it crossed the area at ridiculously high speed shortly before the cable was cut.
For us Americans...
A Telstra spokesman said today the link, laid "donkey's years ago", carried very little of the telco's network traffic before yesterday's cut.
This confused me, until I found the idiom.
(It wasn't here or here.)
--
let me rephrase these two paragraphs, for those of us who might be confused by them:
A Telstra spokesman confirmed today that a container ship at the focus of investigations behind the Southern Cross Cable cut yesterday also appeared to have caught the 25-year-old Tasman 1 cable linking Sydney with Auckland in New Zealand.
The 2Mbps link, which until Sunday was still used as a backup route across the Tasman Sea, has been decomissioned as repair costs outweigh the benefits of maintaining the link.
As previously reported, the "Southern Cross Cable" was cut yesterday, unintentionally.
However, another cable, a 25-year-old one linking Sydney, Australia with Auckland, New Zealand was also cut. It was a "Tasman 1" type cable.
The ship that is at the focus of authorities' investigations for the first cutting is apparently responsible for this second cutting also.
This is according to a Telstra spokesperson.
This second cut link was a 2Mbps link. It was still in use until it was accidentally cut, but only as a backup route. It goes across the Tasman Sea.
Since being cut, it was decided that the line would be not be repaired, since the benefits of maintaining the link aren't worth the high repair costs.
It is now being "posthumously" decomissioned with a celebration party.
Phew!
--
Well, isn't that nice...a geek with a fantasy complex.
I hate to break it to ya, bub, but all claims of "99.999%" reliability with physical devices are outlandish lies. I can't even claim 98% reliability with my own alarm clock; how am I supposed to do so with a bank of servers attached to the same line on the same power supply running the same OS with the same specialized code? 99.999% is a marketing lie -- the internet will never have complete reliability, because it is far too complex and has too many variables.
Your line that customers should sue for gaps in reliability is just selfish and silly. There was no way the company could have sped up the process, or they would have done so...I'm sure this was a terrible embarrasment. So if a group of customers were to file suit, this would be nothing more than a nuisance. Southern Cross didn't purposefully bring them down and they handled it as quickly as possible. A break in about 200 pieces of glass, each thiner than your hair and wrapper with insulant, jelly, 1/2 steel pipe and a copper conductor is not as easy as splicing two wires under a car hood -- a process which takes me about five minutes per wire.
The internet is a self switching entity tied to a scant few superfast backbones, and can never be 100% reliable. The trend towards claims that approach 100% is dangerous, because it causes investors and customers to see real claims (such as 98% reliability, or 100% during business hours, 96% after 7 pm) as underrated. And when you're looking for a host for your data, what's most important is the real uptime. Trying to find meaning in "99.999&" is like looking for the leprechaun in a box of Lucky Charms.
Hey freaks: now you're ju
If nothing else, it might keep them busy enough to save a whale or two.
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