2 September 2010

Network Dictionary – Backhoe Attenuation

Backhoe Attenuation – term used to describe the loss of signal (attenuation) of your copper or fibre cable by a backhoe digging your cable out of the ground.

In Service Provider circles, the predator that causes the breakage is often known as a “Long Necked Fibre Eater” to describe one of the few naturally occurring predators for fibre optic cables.

The Long Necked Fibre Eater is particularly nasty predator because it can easily damage several kilometres of cable making a quick fix impossible. A voracious feeder, it can consume hundreds of metres of fibre optic and copper cable in a single feast.

The following image shows the Short Necked Fibre Eater digging for food in a typical urban environment. Note the damage it causes as it forages for food.

short necked fibre eater 1.jpg

And in this very moving photo you can see a “Long Necked Fibre Eater” migrating across an area where they have completely devastated the local ecology by overgrazing.

long necked fibre eater migrating.jpg

And this is a very rare shot of a fibre eater in action in an urban environment.

fibre-eater-1.jpg

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About Greg Ferro
Greg is a Network and Security Architect / Designer / Engineer working freelance in the UK and worked for Resellers, DotCom's, Large Corporate's and Service Providers across a variety of products & Vendors. He prefers to work for end users, believes in the life cycle, total cost of ownership and that near enough is often good enough. He likes talking about himself in the first person to feel "royal", even when hosting the Packet Pushers Podcast on Data Networking. More about Greg at http://etherealmind.com/who-am-i/ and you can follow him on Twitter.

Comments

  1. These nasty fibre predators fear nothing, but one thing. In times of economic depressions, cables are left alone.

    Where I live, the most devastating type is Eastern European Migratory Fibre Eater. A particulary nasty type that has no regard for fibre optics (nor GPS).

  2. mike says:

    Once again I’m puzzled that they call us (Ecuador, SA) a third world country. We’ve overcome “Backhoe Attenuation” years ago by hanging our fibre high on poles (or occasionally banana trees). Just remember to hang them high enough to prevent this (http://bit.ly/LEyHN) type of attenuation.

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