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Telephone demarc boxes #5142175
06/23/19 08:10 PM
06/23/19 08:10 PM
Joined: Mar 2004
Posts: 22,491
Upstate NY
Donald Offline OP
Donald  Offline OP

Joined: Mar 2004
Posts: 22,491
Upstate NY
Is there a way to tell if the surge protector in the box is still functioning as a surge protector?

Maybe we have an old phoneman as a BITOG member?


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Telephone demarc boxes [Re: Donald] #5142213
06/23/19 08:52 PM
06/23/19 08:52 PM
Joined: Feb 2007
Posts: 116
Maryland
chemman Offline
chemman  Offline

Joined: Feb 2007
Posts: 116
Maryland
I had to have the surge protector replaced twice in the last five years. I knew something was wrong when I picked up the phone and all I heard was a constant staticy noise and could not dial any numbers. Took the repair tech about 5 minutes start to finish to diagnose and fix the problem.


92 Olds 88 Hav 5w30 PL/L24011
99 Buick Century Hav 5w30 PL/L24011
99 Silverado 5.3L Hav 5w30 PL/L25288
04 TrailBlazer 4.2L Hav 5w30 PL/L25288
Re: Telephone demarc boxes [Re: chemman] #5142268
06/23/19 09:34 PM
06/23/19 09:34 PM
Joined: Mar 2004
Posts: 22,491
Upstate NY
Donald Offline OP
Donald  Offline OP

Joined: Mar 2004
Posts: 22,491
Upstate NY
Originally Posted by chemman
I had to have the surge protector replaced twice in the last five years. I knew something was wrong when I picked up the phone and all I heard was a constant staticy noise and could not dial any numbers. Took the repair tech about 5 minutes start to finish to diagnose and fix the problem.


Yes, I am sure a phoneman knows how to test a surge protector, but how can I test it?


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Telephone demarc boxes [Re: Donald] #5142315
06/23/19 10:29 PM
06/23/19 10:29 PM
Joined: Sep 2012
Posts: 632
Michigan
NO2 Offline
NO2  Offline

Joined: Sep 2012
Posts: 632
Michigan
Amazing that these are still in active use.

Re: Telephone demarc boxes [Re: Donald] #5142345
06/23/19 11:10 PM
06/23/19 11:10 PM
Joined: Feb 2007
Posts: 116
Maryland
chemman Offline
chemman  Offline

Joined: Feb 2007
Posts: 116
Maryland
I think that if your line is noisy, then the surge protector is bad. If it's quiet then the surge protector is likely bad. That would be my guess based on the two instances I experienced.


92 Olds 88 Hav 5w30 PL/L24011
99 Buick Century Hav 5w30 PL/L24011
99 Silverado 5.3L Hav 5w30 PL/L25288
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Re: Telephone demarc boxes [Re: Donald] #5142378
06/24/19 12:20 AM
06/24/19 12:20 AM
Joined: Jun 2011
Posts: 1
california
tank Offline
tank  Offline

Joined: Jun 2011
Posts: 1
california
The protector is in place to protect the inside wiring and customer premise equipment from power surges/lightning strikes. They are gas filled and I’ve seen them pop in hot weather. Just bypass it. Drop wire to IW. See if dial tone returns. Best way is to clip to the disconnected drop with a buttset. I was a telephone repairman for seventeen years and have changed quite a few of them.


2019 Toyota Tacoma TRD Sport
Re: Telephone demarc boxes [Re: chemman] #5142381
06/24/19 12:32 AM
06/24/19 12:32 AM
Joined: Aug 2017
Posts: 689
Cincinnati, USA
Dave9 Offline
Dave9  Offline

Joined: Aug 2017
Posts: 689
Cincinnati, USA
Originally Posted by chemman
I think that if your line is noisy, then the surge protector is bad. If it's quiet then the surge protector is likely bad. That would be my guess based on the two instances I experienced.

lol WHUT? Either way it's bad?

Okay I get what you meant, but let's back up a minute...

How to test whether a surge protector still works depends on how it's designed. Each discrete component has its own test method.

Unless you're a rocket surgeon (aka electronics guru) who has a bench supply capable of generating high voltage, and reverse engineer the surge protector to determine what the clamp voltage should be, then instead you inspect the components.

Again it depends on how it is designed, but to start with, if you see spark gaps with burnt bridges, or MOVs cracked apart or pinholes in them, they are out of service. Similarly any blackened component is suspect. I am over-generalizing now, some things like TVS or GDT, are probably fine if they look okay. Shunting a large surge then failing to provide further protection, tends to be destructive visually.

Re: Telephone demarc boxes [Re: Dave9] #5142418
06/24/19 02:34 AM
06/24/19 02:34 AM
Joined: Jun 2003
Posts: 10,943
Illinois
javacontour Offline
javacontour  Offline

Joined: Jun 2003
Posts: 10,943
Illinois
Noisy as in popcorn or similar on the line. Quiet as in no dial tone at all.


network down, IP packets delivered via UPS -BOFH
Re: Telephone demarc boxes [Re: Donald] #5142502
06/24/19 07:38 AM
06/24/19 07:38 AM
Joined: Sep 2015
Posts: 1,945
USA
mk378 Offline
mk378  Offline

Joined: Sep 2015
Posts: 1,945
USA
If one fails open it'll also be physically blown to smithereens.

Re: Telephone demarc boxes [Re: Donald] #5151241
07/04/19 12:56 PM
07/04/19 12:56 PM
Joined: Mar 2004
Posts: 22,491
Upstate NY
Donald Offline OP
Donald  Offline OP

Joined: Mar 2004
Posts: 22,491
Upstate NY
Are the new phone company lightning protectors gas tube vs a carbon button?


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
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