| | Joined: Sep 2007 Posts: 1,173 Member | OP  Member Joined: Sep 2007 Posts: 1,173 | We have a Samsung system - OS 500 - when the customer installed their own sky-high, long, substandard 25-pair cable between buildings years ago and now it is failing.
Testing for direct shorts reveals nothing. Maybe a squirrel had a snack. Is there a way to put Mike Sandman or other fuses on the pairs to see which ones are failing?
Of course, replacing the inside-grade, non-protected cable is the answer, but if the problems with the remote stations (all lights light up, phone inoperable) continues, it wouldn't look so great. I've noticed in PDX over the years it is very rare to see lightning protection in place also. | | | | | Joined: Sep 2005 Posts: 9,221 Admin |  Admin Joined: Sep 2005 Posts: 9,221 | Indoor cable used outside then most likely there is moisture is inside the cable and the insulation has broke down with the UV rays. You need to test the conductors for high resistance shorts and voltage breakdown or don't waste the time and replace the cable. | | | | | Joined: May 2002 Posts: 17,609 Likes: 1 Member |  Member Joined: May 2002 Posts: 17,609 Likes: 1 | Test it for opens and high resistant shorts, grounds and crosses, just takes a simple volt ohm meter and for this. I prefer one with a needle over digital. I can't think of anything you can put on pairs that monitors them.
One thing about it, if the cable is going bad and you find some good pair to use, once you apply battery to those pairs they too will eventually go bad. Sooner or later the cable will need replaced.
Retired phone dude
| | | | | Joined: Feb 2005 Posts: 12,314 Likes: 2 Member | | Member Joined: Feb 2005 Posts: 12,314 Likes: 2 | I prefer one with a needle over digital.
I like the old kick meter for this. There is a reason for that 45 volt battery.
-Hal
CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
| | | | | Joined: May 2002 Posts: 17,609 Likes: 1 Member | | Member Joined: May 2002 Posts: 17,609 Likes: 1 | Me too Hal, just don't have one.
Retired phone dude
| | | | | Joined: Sep 2007 Posts: 1,173 Member | | OP Member Joined: Sep 2007 Posts: 1,173 | Thanks for the tips guys. | | | | | Joined: Dec 2007 Posts: 908 Member | | Member Joined: Dec 2007 Posts: 908 | and if you do find faults you will need a wheatstone bridge to locate them( old cable dekskman talking). | | | | | Joined: May 2007 Posts: 5,005 Likes: 2 Moderator-1A2, Cabling | | Moderator-1A2, Cabling Joined: May 2007 Posts: 5,005 Likes: 2 | A cat5/6 tester (Pentascanner/Fluke/etc) will give you distances to shorts/opens etc.
Sam
"Where are we going and why are we in this hand basket?"
| | | | | Joined: Dec 2007 Posts: 908 Member | | Member Joined: Dec 2007 Posts: 908 | | | | | | Joined: May 2002 Posts: 17,609 Likes: 1 Member | | Member Joined: May 2002 Posts: 17,609 Likes: 1 | I shot a lot of trouble with a Wheatstone and 76C. Was much easier when the new fault locators came out. Can't beat a butt set and V/ohm meter for quick trouble shooting. Fault locating is another story. I still just use a ohm meter for solid faults.
Retired phone dude
| | | | Forums93 Topics94,373 Posts639,627 Members49,454 | | Most Online5,661
May 23rd, 2018 | | |
25 members (CyberLaw, Biztel Cuban Okie Tech, justbill, KRRath, Curlycord, gelehu, pvj, Silversam, hitechcomm, Daniel, JBean3329, MooreTel, metelcom, BobRobert, Skunky, Touch Tone Tommy, dougster, Bob3470, ffej010, ssdr9163, Professor Shadow, Yoda, Mercenary Roadie, hbiss, nortelvoip),
296
guests, and
78
robots. | | Key: Admin,
Global Mod,
Mod | | |
|
