Re: Surge Protection
At 11:56 AM 7/22/2004, you wrote: Have anyone experienced hardware failure related to electrical spikes coming into your datacenters or equipment locations via the telco facilities? I am referring specifically to copper facilities for DS1's, etc. I know that the telco must maintain good grounding, but sometimes when you get hit with a few Gigavolts worth of electrical energy not much will help you. Whatever the case, has anyone had any experience good or otherwise with surge protection for their Telcom circuits? I am looking at this unit below as a possible solution. Rule #1, don't trust the telco or the power company, or anyone else feeding wires into your building to do a good job keeping you safe from surges. A client of mine has what used to be a CSU/DSU... now has surface mount components missing and the like. They hadn't installed a surge protector on the T-1. They had covered the power and the antenna coaxes at the site. Only the T-1 line was unprotected. Lightning will find that one path you've not protected. The cost of installing a surge protector is unlikely to impact your bottom line. One successful lightning strike on the other hand will hurt quite a bit, and probably happen at 4AM just to be more annoying.
Re: Surge Protection
Daniel Senie wrote: The cost of installing a surge protector is unlikely to impact your bottom line. One successful lightning strike on the other hand will hurt quite a bit, and probably happen at 4AM just to be more annoying. Yes... we had a strike hit a remote mountain POP via the T1. From the router it managed to propogate onto the switch and from the switch onto the connected hosts and caused a catastrophic failure. Fortunately the hosts mainly lost their NICs. We have since purchased some polyphaser surge protectors. Can't remember if this was the vendor or not: http://www.comm-omni.com/polyweb/t1.htm Google has +400 matches on the exact phrase T1 surge protector
Re: Surge Protection
Polyphaser does make excellent surge supression gear they make it for all communications services. i.e. Broadcast Radio, television, cell sites, gov't/military. Being a ham I use their gear myself expensive but cheaper than a new rig. Especially since the rig is connected to a structure designed to attract electromagnetic fields. Scott C. McGrath On Thu, 22 Jul 2004, Mike Lewinski wrote: Daniel Senie wrote: The cost of installing a surge protector is unlikely to impact your bottom line. One successful lightning strike on the other hand will hurt quite a bit, and probably happen at 4AM just to be more annoying. Yes... we had a strike hit a remote mountain POP via the T1. From the router it managed to propogate onto the switch and from the switch onto the connected hosts and caused a catastrophic failure. Fortunately the hosts mainly lost their NICs. We have since purchased some polyphaser surge protectors. Can't remember if this was the vendor or not: http://www.comm-omni.com/polyweb/t1.htm Google has +400 matches on the exact phrase T1 surge protector
Re: Surge Protection
A good principle is to only let fiber links into your buildings. This is especially a good idea with roof mounted satellite or P2P microwave links, which otherwise are basically lightening rods attached to your routers / rf equipment / whatever. I thought this was a PITA when I first encountered it with the Navy but it works and saves a lot of grief. On Jul 22, 2004, at 1:06 PM, Daniel Senie wrote: At 11:56 AM 7/22/2004, you wrote: Have anyone experienced hardware failure related to electrical spikes coming into your datacenters or equipment locations via the telco facilities? I am referring specifically to copper facilities for DS1's, etc. I know that the telco must maintain good grounding, but sometimes when you get hit with a few Gigavolts worth of electrical energy not much will help you. Whatever the case, has anyone had any experience good or otherwise with surge protection for their Telcom circuits? I am looking at this unit below as a possible solution. Rule #1, don't trust the telco or the power company, or anyone else feeding wires into your building to do a good job keeping you safe from surges. A client of mine has what used to be a CSU/DSU... now has surface mount components missing and the like. They hadn't installed a surge protector on the T-1. They had covered the power and the antenna coaxes at the site. Only the T-1 line was unprotected. Lightning will find that one path you've not protected. The cost of installing a surge protector is unlikely to impact your bottom line. One successful lightning strike on the other hand will hurt quite a bit, and probably happen at 4AM just to be more annoying. Regards Marshall Eubanks
Re: Surge Protection
- Original Message - We have since purchased some polyphaser surge protectors. I'll second the polyphaser as a good product. We put it in a POP in the base of a 460 foot tower and the equipment and it survived unscathed for at least 5 direct tower lightning hits that we know of since 1998. There were 13 DS1's that sometimes popped fuses at the demarc during a strike. The Polyphaser stuff protected but the hits were never big enough to cause it to fail in a shorted state after strikes. They have a web site http://www.polyphaser.com It must still be installed according to proper engineering principles for best protection. They have some great engineering references on their web site.
Re: Surge Protection
Speaking on Deep Background, the Press Secretary whispered: - Original Message - We have since purchased some polyphaser surge protectors. I'll second the polyphaser as a good product. Thirds It must still be installed according to proper engineering principles for best protection. They have some great engineering references on their web site. VERY IMPORTANT. Poorly deployed lightning protection is as effective as condoms left in the cabinet... And YES, fiber is better. Not every Polyphaser can save your butt from ground differential issues. Fiber will. -- A host is a host from coast to [EMAIL PROTECTED] no one will talk to a host that's close[v].(301) 56-LINUX Unless the host (that isn't close).pob 1433 is busy, hung or dead20915-1433
