Yeah, I like to see these.... Helps me to know where the design is susceptible to this type of stuff - although at some point it really just starts to feel like whack-a-mole: With enough energy, something is going to fry, and if you strengthen one part (or protect it better), then the energy is just going to choose something else to cook.
On Mon, May 1, 2017 at 4:56 PM, George Skorup <[email protected]> wrote: > Sorry to hijack, but semi related... > > We either had a really bad power surge or a very close lightning strike at > our NOC over the weekend. No visible signs of a direct strike to the tower. > I'm leaning towards the power surge since other networked things in the > office died, and our office telco/network closet is uplinked to the server > room via a pair of fiber. Railroad stuff was all messed up at several > crossings. And other businesses nearby lost various electronics as well. > > Two AF24's and an AF5. GigE-APCs at the bottom weren't burned up, but were > obviously dead. The AF POE injectors all shut down when plugged into them. > The GigE-SS's on top apparently stopped the surge from hitting the radios. > After I bypassed the GigE-APCs at the bottom, the ethernet links would only > run at 100Mbps, plus errors. After bypassing the GigE-SS's on top this > morning, all three are running GigE again with no errors. So that saved a > lot of work today. > > However, it wasn't so good for the 5GHz 450i cluster at the top. Don't > know how, but one survived. We relied on the 450's built-in suppression at > the top. Didn't happen. The GigE-APCs were all dead. So yeah, you should > probably just run GigE-SS's near a radio, even if it claims surge > suppression is built in. > > The PacketFlux PowerInjector+Sync had two of the ports with visible damage > on the board. Took out the SiteMonitor Base unit with it. Forrest, if you > want these for failure analysis, just let me know. I'd be happy to send > them to you. When I got the office, the green LED was flashing 2, and I > believe port #2 was a damaged one. It also took out all four of those ports > on the CCR1036. > > I've seen similar events over the years and this clearly looks like bottom > up, i.e. utility surge. And of course the one thing I forgot after doing > the generator and transfer switches.... the f'n whole panel surge > suppressor. I would've moved the existing one over to the other panel, but > I needed different breakers. > > On 5/1/2017 11:22 AM, Chuck McCown wrote: > > During a recent solder paste reorder, one of our people ordered a > different solder than we historically have been using. It requires a > different cleaning method than we normally use. > > We only recently noticed this when making some new product prototypes. > So, for a relatively short amount of time, the boards have not been > properly cleaned. > > We will offer free advance replacements for any of our products purchased > this year just so we can inspect them. I don’t think it has been going on > for a long time but I am not totally certain exactly when this happened. > > If you have anything acting goofy or just don’t to chance it, let us know > and we will ship you some new ones to swap with. > > > -- *Forrest Christian* *CEO**, PacketFlux Technologies, Inc.* Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602 [email protected] | http://www.packetflux.com <http://www.linkedin.com/in/fwchristian> <http://facebook.com/packetflux> <http://twitter.com/@packetflux>
