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train_wreck
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Antioch, TN
Cisco ASA 5506
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Re: [CustSvc] At work pics.... Yes I am a professional!!! 56k/DSL DIE!!!

said by gar187er:

the state has a substantial fiber network, it was boggling my mind why they wouldnt pull a 6ct to this thing and be done.

no idea why they cheaped out...

maybe because it would have been more expensive to run fiber to the thing?

Zenit_IIfx
The system is the solution
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Purcellville, VA
·Comcast XFINITY

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»www.electroline.com/fact ··· tRev.pdf

Here is another rugged modem, this time from a more known name brand...

The application of pole mounted camera explains why I saw an Ethernet cable sticking out of a pole access cover a few months ago.

Napsterbater
Meh
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Or because the red light camera is not being installed maintained owned by the government.

There is a decent chance depending on where that is that its owned and operated my a private business under contract for the gov thus they may not be aloud to use the gov fiber.

train_wreck
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Antioch, TN
Cisco ASA 5506
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train_wreck

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said by Napsterbater:

Or because the red light camera is not being installed maintained owned by the government.

There is a decent chance depending on where that is that its owned and operated my a private business under contract for the gov thus they may not be aloud to use the gov fiber.

yeah, actually that sounds more like it.

wonder if it's a redflex?

DarkLogix
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Baytown, TX

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said by Zenit_IIfx:

»www.hitrontech.com/en/ca ··· hp?id=53

Wouldn't this be a solution to that problem? You would think that a municipality that is setting up red light cams would spend the cash to get actual rugged gear.

The cameras tend to be done by a contractor not the muni themselves, and you know gov and lowest bidder.

beachintech
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State doesn't own the redlight cameras (Neither does the city that is located in), it's a contractor who takes the lions share of the funds from it.

PS: Thank you for keeping my service running 100% now that I am no longer a tech - this has been a great system to live in.
Expand your moderator at work

gar187er
I DID this for a living
join:2006-06-24
Seattle, WA

gar187er

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Re: [CustSvc] At work pics.... Yes I am a professional!!! 56k/DSL DIE!!!

OOOOOKKKKKKKKaaaayyyyyy...

its not a dead animal on the side of the road this time.

It may not look too terrible, but when you have to call your boss to go buy a sump pump, and it takes 3 guys 2 hours to dig through this slop....yea it sucked. My boots are drying outside right now as we speak.



DarkLogix
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DarkLogix

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So what caused the problem?

YukonHawk
join:2001-01-07
Patterson, NY

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Almost looks like quicksand

WoofieInPC
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join:2009-04-04
Panama City, FL

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Nice thread!

Zenit_IIfx
The system is the solution
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join:2012-05-07
Purcellville, VA
·Comcast XFINITY

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I imagine the ground here is like that now after all the snow melted super rapidly with the really warm weather we have gained right after 20 degree days...

Perhaps not AS water laden, but close.

So, what causes an underground cable like that to fail? Water ingress?

ropeguru
Premium Member
join:2001-01-25
Mechanicsville, VA

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said by Zenit_IIfx:

Here is another rugged modem, this time from a more known name brand...

Good luck in getting it provisioned by Comcast though.

Zenit_IIfx
The system is the solution
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Zenit_IIfx

Premium Member

I find it hard to believe Comcast has nothing in their inventory for embedded/outdoor use.

The BelAir outdoor wifi AP's are one example of rugged DOCSIS3.0 hardware Comcast uses.

train_wreck
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Antioch, TN
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said by Zenit_IIfx:

So, what causes an underground cable like that to fail?

further, how did ya'll know to dig in that exact spot?
JoelC707
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join:2002-07-09
Lanett, AL

JoelC707

Premium Member

said by train_wreck:

further, how did ya'll know to dig in that exact spot?

Most likely though a TDR: »en.wikipedia.org/wiki/Ti ··· ctometer

DarkLogix
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Baytown, TX

DarkLogix

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said by JoelC707:

said by train_wreck:

further, how did ya'll know to dig in that exact spot?

Most likely though a TDR: »en.wikipedia.org/wiki/Ti ··· ctometer

Ya lots of tech that can find how far along a cable an issue is, and if you know the exact path of the cable you can then trace it to where the issue is.

At work we have a fluke device that does it for Ethernet cable, just gotta figure where the cable's path is.

There are also devices that do it for fiber, I think the idea is it sends a pulse and times the return of the reflection or something like that.

Zenit_IIfx
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Zenit_IIfx

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»www.ebay.com/itm/Optical ··· 85190474

Found a relic, really early OTDR test set from Western Electric. Quite possibly from the late 70's when Ma Bell started fiber deployment in the network...anyone have a use for such an old bit of test gear?

There is another way to find cable faults too, but not in CATV-world. Old telephone cables are air-pressurized, and with a little bit of math you can calculate how far the leak is from the source of pressurization (there are typically more than one along the span of the cable).

SeaSeaTee5
join:2010-05-06
Maryland

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Many times all you need is a leakage detector.

I use these two...

gar187er
I DID this for a living
join:2006-06-24
Seattle, WA

gar187er

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leak detector was all i needed.




A drainage pipe hit the cable, and slowly it rotted away, and filled with water.
Corporate
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said by Zenit_IIfx:

»www.ebay.com/itm/Optical ··· 85190474

Found a relic, really early OTDR test set from Western Electric. Quite possibly from the late 70's...

1982

Zenit_IIfx
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Zenit_IIfx

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How did I miss that picture earlier??? Thanks!

The Omaha Works of WECO mainly produced PBX equipment, so it went to Avaya when Lucent spun off the PBX business. The factory was shut down in 04...

train_wreck
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said by JoelC707:

said by train_wreck:

further, how did ya'll know to dig in that exact spot?

Most likely though a TDR: »en.wikipedia.org/wiki/Ti ··· ctometer

wow, VERY slick; they're apparently accurate to the centimeter. they make models for ethernet as well, which i thought about buying, until i saw the price tags 5 figures in some cases

DocDrew
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DocDrew

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With experience, a good OTDR, and accurate maps... You can often drive to the damaged spot within a span or two, after testing from 30 miles away.

I directed a repair crew to a spot across the street just last month from 20 miles away. The fiber had been moved underground a few months before and wasn't shown that way on the maps I had yet. A car had run over a cable tap ped that a fiber loop also snaked through.

train_wreck
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train_wreck

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said by DocDrew:

With experience, a good OTDR, and accurate maps... You can often drive to the damaged spot within a span or two, after testing from 30 miles away.

I directed a repair crew to a spot across the street just last month from 20 miles away. The fiber had been moved underground a few months before and wasn't shown that way on the maps I had yet. A car had run over a cable tap ped that a fiber loop also snaked through.

Yeah, I would think the maps would be critical to keep up-to-date.

From the wiki article, "A TDR is similar in principle to radar." I suppose this is because the physics of RF waves traveling over copper are similar to those that travel over air/through water...

DocDrew
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DocDrew

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Yup just have to know the speed of the signal in the particular cable you're testing. Iirc, Rf is around 89% the speed of light in coax. Light is about 68% in fiber.

maxbrando
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said by DocDrew:

Rf is around 89% the speed of light in coax

It depends on design
For example solid PE dielectric coax tend to have a VoP of 65-70%
foam PE coax is usually around 80-85%
and air delectric cable such as commscope/trilogy mc2 it is over 90%

DocDrew
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1 edit

DocDrew

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I know, actually I meant to write 84%. Just didn't want to get too detailed. Besides I'm out in Vegas tonight.

DarkLogix
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DarkLogix

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said by DocDrew:

I know, actually I meant to write 84%. Just didn't want to get too detailed. Besides I'm out in Vegas tonight.

Are you gambling at the speed of Rf through air dielectric coax?
JoelC707
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Lanett, AL

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said by train_wreck:

they make models for ethernet as well, which i thought about buying, until i saw the price tags, 5 figures in some cases

Just get yourself a good network tester. Even some of the low end ones will tell you the cable length. It may not be as accurate as a true TDR but I found them to be close enough.