sundance-communications.com/forum Forums TDM Business Telephone Systems Samsung Telephones & Systems OS 7100 CO line troubles HELP!!!!!!!!

Awesome troubleshooting, we had a similar problem on a Norstar - a welder next door would cause the whole system to just reboot every time they struck an arc with it. Some special high frequency unit... We had the phone system moved to one of the phases that welder wasnt on, and presto... fixed. Hope that's the end of troubles with that customer, and just in time for some holiday cheer - they should be getting you a nice bottle of something that warms the insides. - for that matter, so should samsung for not putting enough RFI protection on the 7100!

Thank you,
this had to be the most frustrating trouble I've ever dealt with in 20 years of doing this and honestly I feel like I just eventually stumbled onto the answer, but I'll take it : ) If that machine was in another building like your Norstar problem I'm not so sure I would have found it.

As for the customer reaction, let's just say he seemed pretty underwhelmed by the fix but I told him that he may want to get an electrician to take a look at his equipment and particularly his ground.

Samsung: From what I gather they know the problem exists on the engineering side and hopefully they'll pass it on to the tech support side but apparently I seem to be the first "lucky one" to run into it on the field side but if nothing else it might save another Tech out there a butt load of stress.

Have a great Holiday

Congratulations on the troubleshooting, that was very smart work.

Normally the LEC ties their lightening protections to a cold water pipe or a copper coated steel rod driven at least six feet in the ground.

Maybe the tech doesn't really know what he can do, as in doesn't want to be bothered to do. If there is a cold water pipe nearby, there is no reason you couldn't run a large gauge copper wire, at least as big as the current ground, to the cold water pipe and use a proper grounding clamp. That would be at least as good as anything AT&T puts in.

Thank you Bunnie,
Smart work: You know that old saying about a thousand monkeys banging on a thousand typewriters? I think I've figured out why I've been craving bananas lately. : )

I waited all day Friday for "The call" insulting my system, me and my parentage but it never came, so I may be finally out of the woods on this. (I do recognize how paranoid I sound btw)

Grounding: Their Electrical panel terminates to a ground rod pretty much right behind it on the outside of the building on which AT&T ties on to, but the actual Electric meter is located at another part of the building, I think they probably have a loose ground in the panel or something wired bass ackwards in that press machine. If I get sucked back into this somehow then I may look for another ground point and/or tell them to call their electrician.

Have A merry Christmas

AS I suggested before, move the demark ground to a cold water pipe with a big thick copper wire and a proper ground clamp.

And you do certainly deserve a pat on the back for the level of your dedication and your detective work. Us out here typing on the computers would have never heard that machine start up so being on site is the only solution on occasion.

Oh, and you might see if there are any markings on the AT&T chokes. If those were better than the Sandman ones, it would be good for us to know about it and maybe where to buy them.

Happy Chanukkah and Merry Christmas