Hans Witvliet wrote: > There's not much that can stand lightning (not just a direct hit), so > you cant't blame the sipura box for that. > Even when it was build, using a Faraday-cage with double insulation with > optocouplers, the amount of energy picked up by a 3 km line is beyond > commercial engineerd products.
So I've found out. We moved here exactly a year ago. Up until April everything was OK, That's after I forced the telco to virtually recable the whole run, (a neighbour likes to take pot shots at road signs etc. they actually found pellets in the cable) April we had a sequence of very violent thunderstorms, the first took out a Sipura 3102, a Linksys 8 port switch and the POE etc of an Aastra 9133i. The shock was so strong it caused the cutout at the meter to drop out, that's 200mtrs away. Exactly one week later a repeat performance, but this time I'd not replaced the Aastra. The third time I woke up to an enormous crash of thunder to see that the power had gone again, I was at the door of the office when the second strike occurred and actually saw the flash as the remaining SPA3000 I had grilled. When the electrician inspected the circuits the next day he told me the previous occupants had lost telephones nearly every time there was a big storm. What is interesting is that crappy little handsets which take their power from the phone line survive and an ADSL modem on the same line has also survived. Who said lightening never strikes twice. DC _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
