<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; color: rgb(0, 0, 0); font-size: 14px; font-family: Calibri, sans-serif;"><div><div>I would get it tracked down by suitable people, it’s one of those things 90% of time not a biggie but you don’t want that 3am call out and then trying to find a floating earth or an earth leakage fault. And it will be in the middle of a down pour increasing the problem.</div><div> </div><div><div>Regards,</div><div><br></div><div><div>Chris Hurley BE (Elec)</div><div>Signal Manager</div><div><br></div><div>******************************************************</div><div>Dragon Rail Pty Ltd Phone: 1300 730 531 </div><div>74 Allanfield Crescent </div><div>Boronia, 3155 Victoria </div><div>Australia </div><div>******************************************************</div></div><div><br></div></div></div><div><br></div><span id="OLK_SRC_BODY_SECTION"><div style="font-family:Geneva; font-size:10pt; text-align:left; color:black; BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; PADDING-RIGHT: 0in; BORDER-TOP: #b5c4df 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt"><span style="font-weight:bold">From: </span> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net">ausnog-bounces@lists.ausnog.net</a>> on behalf of Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com">paulwilkins369@gmail.com</a>><br><span style="font-weight:bold">Date: </span> Monday, 20 March 2017 at 6:55 PM<br><span style="font-weight:bold">To: </span> "<a href="mailto:ausnog@lists.ausnog.net">ausnog@lists.ausnog.net</a>" <<a href="mailto:ausnog@lists.ausnog.net">ausnog@lists.ausnog.net</a>><br><span style="font-weight:bold">Subject: </span> Re: [AusNOG] Earthing problems and switching infrastructure.<br></div><div><br></div><div dir="ltr"><div><div>Doubtful. You're not going to be inducing 0.5V. I'd be more worried that the ground is floating, which definitely can cause signal and equipment problems.<br><br></div>Kind regards<br><br></div>Paul Wilkins<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 20 March 2017 at 18:36, Peter Tiggerdine <span dir="ltr"><<a href="mailto:ptiggerdine@gmail.com" target="_blank">ptiggerdine@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">the radio station is 6PR so it's AM.<br><br>
There's no onsite PABX or music being fed into it.<br><br>
It's happens on one floor of a multi storey building.<br><br>
Is the consensus that this type of interference can cause network<br>
performance problems?<br><span class="im HOEnZb">Regards,<br><br>
Peter Tiggerdine<br><br>
GPG Fingerprint: 2A3F EA19 F6C2 93C1 411D 5AB2 D5A8 E8A8 0E74 6127<br><br><br></span><div class="HOEnZb"><div class="h5">On Mon, Mar 20, 2017 at 5:07 PM, Paul Wilkins <<a href="mailto:paulwilkins369@gmail.com">paulwilkins369@gmail.com</a>> wrote:<br>
> Any analog telephony streaming music on hold from the internet? So just<br>
> appears it's coming over the air, but actually EMI bleeding from their MOH<br>
> server?<br>
><br>
> Kind regards<br>
><br>
> Paul Wilkins<br>
><br>
> On 20 March 2017 at 17:40, Damien Gardner Jnr <<a href="mailto:rendrag@rendrag.net">rendrag@rendrag.net</a>> wrote:<br>
>><br>
>> Few questions..<br>
>><br>
>> How 'local' is the radio station? Within a km? or just within 50km? AM<br>
>> or FM station?<br>
>><br>
>> Do they hear the radio station if they touch the probe to themselves?<br>
>><br>
>> Does the customer have a PABX with that radio station fed into it from a<br>
>> connected radio?<br>
>><br>
>> If no fed PABX, and the station is FM that is VERY unusual. AM, I could<br>
>> understand, if there's a IF being generated by some equipment which is<br>
>> modulating at almost exactly the station's frequency.<br>
>><br>
>> I'd be finding the building's MEN bond, and testing there, then working<br>
>> your way back out to the individual equipment, and see where it's<br>
>> introduced. That said, I'd probably just call a qualified electrician, as<br>
>> they're more likely to spot the issue, and you'll likely need to take the<br>
>> front off the switchboard to get at the bond point.<br>
>><br>
>> On 20 March 2017 at 17:24, Peter Tiggerdine <<a href="mailto:ptiggerdine@gmail.com">ptiggerdine@gmail.com</a>> wrote:<br>
>>><br>
>>> Hi All,<br>
>>><br>
>>> I've got a customer that can touch any steel object that's connected<br>
>>> to earth and listen to the local radio station with a tone generator<br>
>>> wand. I've chalked this up an earthing problem touching a copper rod<br>
>>> or possibly building antenna.<br>
>>><br>
>>> The question is weather this is likely to impact switches and possibly<br>
>>> network performance. I'm airing on the side of very unlikely but it's<br>
>>> all frequency so unsure.<br>
>>><br>
>>> Happy for off list or on list replies.<br>
>>><br>
>>> Regards,<br>
>>><br>
>>> Peter Tiggerdine<br>
>>><br>
>>> GPG Fingerprint: 2A3F EA19 F6C2 93C1 411D 5AB2 D5A8 E8A8 0E74 6127<br>
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>><br>
>><br>
>><br>
>><br>
>> --<br>
>><br>
>> Damien Gardner Jnr<br>
>> VK2TDG. Dip EE. GradIEAust<br>
>> <a href="mailto:rendrag@rendrag.net">rendrag@rendrag.net</a> - <a href="http://www.rendrag.net/" rel="noreferrer" target="_blank">http://www.rendrag.net/</a><br>
>> --<br>
>> We rode on the winds of the rising storm,<br>
>> We ran to the sounds of thunder.<br>
>> We danced among the lightning bolts,<br>
>> and tore the world asunder<br>
>><br>
>><br>
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