Phone Systems

Previous Thread
Next Thread
Print Thread
Rate This Thread
#629968 - 05/22/19 01:53 PM Lightning Protection  
Joined: Feb 2010
Posts: 326
teldata1 Offline
teldata1  Offline

Joined: Feb 2010
Posts: 326
I have a customer with an NEC SV9100 (School) That get hit with Lightning 1 to 2 times a year which blows out (2) of the 16 port digital station cards that are connected to another building
The phone system was installed in 2015 (Spring)

They didn't start having problems until summer of 2017 (They got hit once knocked out (2) Station cards going to another building they also had some other computer devises get damaged

Then again in summer of 2018 (2) Times

Then yesterday in 2019

Keeps blowing out the same 2 cards (which causes the whole system to be flaky until you pull the cards out

There is Lightning protection on this 100 Pair cable which is grounded my question is how can I tell what kind of lightning protection is installed I am thinking its not for digital phones

I am assuming that its for analog its been installed for a while

it just says Lucent Technologies on the cover

looking for some suggestions



Google Telephone Equipment Search
#629970 - 05/22/19 02:56 PM Re: Lightning Protection [Re: teldata1]  
Joined: Oct 2004
Posts: 1,446
oobie Offline
oobie  Offline


Joined: Oct 2004
Posts: 1,446
central pa
I would put some extra lightning protection like ITW-linx UPB-75 or 35 on them before the phone system. Give ITW linx a call they can help you out! I've been using them as secondary protection for a while now.

Last edited by oobie; 05/22/19 02:57 PM.
#630047 - 05/24/19 07:41 PM Re: Lightning Protection [Re: teldata1]  
Joined: May 2007
Posts: 4,669
Silversam Online content
Moderator-1A2, Cabling
Silversam  Online Content

Moderator-1A2, Cabling

Joined: May 2007
Posts: 4,669
Carbon Protection is the cheapest and S H O U L D work on Analog Phones. For Digital sets or PBX cards you should use Gas protectors or one of the newer types (Thyristor, maybe? - I don't remember, having never worked on them).


"Where are we going and why are we in this hand basket?"
#630058 - 05/25/19 03:39 AM Re: Lightning Protection [Re: teldata1]  
Joined: Feb 2005
Posts: 11,944
hbiss Online content
hbiss  Online Content


Joined: Feb 2005
Posts: 11,944
New York
5 pin gas tube or solid state protectors of the proper voltage, I believe 50 volts but you will have to check your system.

Also, I know you said the present protectors are grounded. That could mean anything but without actually seeing how it was done and what you have available I can't comment.


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.
#630218 - 06/02/19 04:48 PM Re: Lightning Protection [Re: teldata1]  
Joined: Sep 2018
Posts: 28
Noobed2336 Online content
Noobed2336  Online Content

Joined: Sep 2018
Posts: 28
Ridgecrest, CA
For protecting 100 pair cable you should be using a 6g solid copper or equivalent conductor going to a ground rod that's also bonded to your building ground. You should be able to test < 25 ohms to earth with a megger at the connection. If it's not that good, then your protectors might not function.

Moderated by  EV607797, Professor Shadow 

Refurbished Phones & Equipment Search
Shout Box
Most Recent 5 Post
AVAYA and Mitel
by Commshark. 08/21/19 01:39 AM
Security Cameras
by Yoda. 08/21/19 12:00 AM
Lead Conduit Strung Between Utility Poles.
by dexman. 08/20/19 09:31 PM
VMMI Version
by Al Rivas. 08/20/19 04:27 PM
VM Playing wrong Greeting
by DD782. 08/20/19 02:19 PM
Who's Online Now
55 registered members (hitechcomm, Yoda, Professor Shadow, hbiss, newtecky, DD782, Noobed2336, RATHER BE FISHING, dexman, ugly1, gelehu, Al Rivas, Commshark, morephones, Curlycord, justbill, Mercenary Roadie, Marvin Brandon, Bob3470, jeffmoss26, ffej010, ChevyFanAttic, BobRobert, Casey Y, JBean3329, nfcphoneman, STS E, michaelm, patel1974, RobB, Touch Tone Tommy, jknichols, DND ON, mbhydro, Carl Navarro, nortelvoip, msnell, vicbob, ctss, Meyery2k, Jeff_M, pvj, hawk82, metelcom, KRRath, Coral Tech, mike b, Memphisribs, Biztel Cuban Okie Tech, iatech3800, Skunky, George Ferguson, BTS01, Silversam, MooreTel), 1,128 guests, and 728 spiders.
Key: Admin, Global Mod, Mod
Tech Support Line 1.800.766.3425
Over the Phone Tech Support for your Phones and Business Phone Systems
Popular Topics(Views)
Newest Members
MarioVA, Marvin Brandon, Jeff_M, ECI Tech, bcs2019
49102 Registered Users
Forum Statistics
Most Online5,661
May 23rd, 2018
Today's Birthdays
Carlos Cockerham, Mark Stepan, millhouse, Rita P
Top Posters(30 Days)
dexman 48
C5Z 42
Yoda 15
Daniel 15
Free Phone Repair Diagnostic
EMP & Lightning Home Surge Protection
EMP - Click Here!
Servpro Ventura 24-Hour Emergency Service
Free Estimates call us now 24Hours
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2019
Trusted Partners